Growth Phenomena Research Articles

Prediction of deciduous teeth eruption in Brazilian children: A cross-sectional study nested in a prospective birth cohort (BRISA)

BackgroundDental eruption is part of a set of children´s somatic growth phenomena. The worldwide accepted human dental eruption chronology is still based on a small sample of European children. However, evidence points to some population variations with the eruption at least two months later in low-income countries, and local standards may be useful. So, this study aimed to predict deciduous teeth eruption from 12 months of age in a Brazilian infant population.MethodsWe developed a cross-sectional study nested in four prospective cohorts – the Brazilian Ribeirão Preto and São Luís Cohort Study (BRISA) – in a sample of 3,733 children aged 12 to 36 months old, corrected by gestational age. We made a reference curve with the number of teeth erupted by age using the Generalized Additive Models for location, scale, and shape (GAMLSS) technique. The explanatory variable was the corrected children´s age. The dependent variable was the number of erupted teeth, by gender, evaluated according to some different outcome distributional forms. The generalized Akaike information criterion (GAIC) and the model residuals were used as the model selection criterion.ResultsThe Box-Cox Power Exponential method was the GAMLSS model with better-fit indexes. Our estimation curve was able to predict the number of erupted deciduous teeth by age, similar to the real values, in addition to describing the evolution of children’s development, with comparative patterns. There was no difference in the mean number of erupted teeth between the sexes. According to the reference curve, at 12 months old, 25% of children had four erupted teeth or less, while 75% had seven or fewer and 95% had 11 or fewer. At 24 months old, 5% had less than 12, and 75% had 18 or more. At 36 months old, around 50% of the population had deciduous dentition completed (20 teeth).ConclusionThe adjusted age was an important predictor of the number of erupted deciduous teeth. This outcome can be a variable incorporated into children’s growth and development curves, such as weight and height curves for age to help dentists and physicians in the monitoring the children’s health.

Post-Traumatic Growth Pada Wanita Yang Mengalami Toxic Relationship Menurut Perspektif Psikologi Islam

This research aims to investigate the phenomenon of Post-traumatic growth (PTG) in women who experience toxic relationships according to an Islamic Psychology perspective. PTG refers to the positive changes and growth that emerge after a traumatic experience, and this research focuses on how women who have been involved in toxic relationships experience positive growth in accordance with the teachings and principles of Islamic Psychology. This research will use a qualitative approach with in-depth interview methods with a number of women who have experienced toxic relationships. Additionally, text and content analysis will be used to identify patterns of positive growth that emerge from these traumatic experiences. The collected data will be analyzed by referring to Islamic psychological concepts such as patience, trust, and muhasabah. It is hoped that the results of this research will provide a deeper understanding of how women experience positive growth after experiencing a toxic relationship, as well as how the principles of Islamic Psychology, such as trust and patience, play an important role in this process. The implications of this research can contribute to the development of a more holistic psychotherapy approach based on Islamic values to help someone overcome traumatic experiences and achieve positive growth.

Praktik Manajemen Strategi Dalam Membangun Kontinuitas Usaha UMKM: Analisis “Rantai Tak Putus” Karya Dee Lestari

Micro, Small and Medium Enterprises (MSMEs) have a vital role in the Indonesian economy, creating new jobs, innovation and unique strategies. The growth phenomenon of MSMEs presents challenges and opportunities, encouraging the need for targeted strategies, in-depth market understanding and adaptability. This research explores strategic management practices in MSMEs in Dee Lestari's "Rantai Tak Putus". The strategies implemented include internal development, making the right decisions, and consistency in implementing positive values. The MSME players in this book are able to adapt strategic management to their business needs, not only for immediate business growth, but also to build a solid foundation for long-term sustainability. This creates an environment that supports business growth, strengthens competitiveness, and ensures the adaptability of MSMEs to change for sustainable business continuity.

Факторы возобновляемого роста фирмы: теоретические подходы и анализ новостного контента

The aim of this paper is to systematize factors that contribute to a company’s transition to restarting growth after long-term stagnating or falling sales. Based on the systematization of factors for the growth restart documented in the world economic literature and the analysis of the news content from Russian enterprises’ websites and open Internet resources, factors for the restart of growth of Russian enterprises are identified. The research methods include systematization, grouping, calculation of economic coefficients, probabilistic analysis, correlation analysis, comparison of frequencies using the Pearson chi-square test. During the research process, a database of news content was compiled for 139 Russian enterprises that demonstrated rapid, renewable growth in 2016–2021. Based on a literature review and an empirical analysis of news content, five main groups of factors for the restarting growth of a company were identified (organizational factors; technological innovation and improvement of production processes; marketing factors; implementation of large projects; participation in exhibitions/competitions and receiving of awards/medals). The analysis of the news content of Russian enterprises shows that enterprises that have restarted growth most often mention organizational changes in the news agenda, and less often marketing and innovation factors. The correlation and frequency analysis revealed non-trivial relationships between joint mentions of groups of growth factors in firm news. Patterns of frequency of combinations of factors in comparison with cases of their independent manifestation were also revealed. The results of the analysis, systematization and verification of the significance of factors for company’s restarting growth will help investors make decisions about investing in promising enterprises that are capable of transitioning to growth after a long stagnation or decline in sales. The specificity of the data on which the factors are identified (news content) will allow investors to use leading indicators of restarting growth without waiting for the company to publish financial statements. Firstly, a description and comprehensive study of a new concept is carried out – renewed growth of enterprises after long-term stagnation or falling sales. The phenomenon of renewable growth of enterprises has not been comprehensively studied before. In the world literature there are observations of individual examples of similar dynamics at the macro-level and in regional studies. However, at the enterprise level, there are only works that describe individual factors of renewable growth. Secondly, factors of renewable growth described in the world literature are systematized. Thirdly, based on the authors’ approach, a sample of Russian enterprises with renewable growth is formed, growth factors are identified based on the analysis of news content on these enterprises, and their research is carried out using economic and mathematical methods.

Understanding the nanoscale phenomena of nucleation and crystal growth in electrodeposition.

Electrodeposition is used at the industrial scale to make coatings, membranes, and composites. With better understanding of the nanoscale phenomena associated with the early stage of the process, electrodeposition has potential to be adopted by manufacturers of energy storage devices, advanced electrode materials, fuel cells, carbon dioxide capturing technologies, and advanced sensing electronics. The ability to conduct precise electrochemical measurements using cyclic voltammetry, chronoamperometry, and chronopotentiometry in addition to control of precursor composition and concentration makes electrocrystallization an attractive method to investigate nucleation and early-stage crystal growth. In this article, we review recent findings of nucleation and crystal growth behaviors at the nanoscale, paying close attention to those that deviate from the classical theories in various electrodeposition systems. The review affirms electrodeposition as a valuable method both for gaining new insights into nucleation and crystallization on surfaces and as a low-cost scalable technology for the manufacturing of advanced materials and devices.

An Overview of Strategies for Conceptualizing Derivative and their Applications in Daily Life for Secondary-Level Mathematics Students

Derivative is a foundational concept in calculus but can be challenging for secondary students to grasp conceptually. This paper provides an overview of research-backed strategies for developing a strong conceptual understanding of derivative. Visual and intuitive approaches are discussed, such as relating the derivative to real-world con-texts involving speed, growth, and modeling phenomena. The importance of multiple linked representations and building connections between graphical, numeric, verbal and symbolic perspectives is emphasized. Strategies for motivating learning through real-world applications and simulations relating concepts to students' lives are out-lined. Procedural expertise and conceptual mastery are cultivated together. The benefits of a conceptual learning, problem solving abilities, and STEM-related fields are noted. Curricular recommendations focus on conceptual exploration prior to for-mal definitions. Thus, the paper highlights best practices for conceptualizing deriva-tive through visual-intuitive, multi-representational and application-based ap-proaches to promote flexible, adaptive understanding and lay the groundwork for calculus success.

Investigating the fracture toughness of the self compacting concrete using ENDB samples by changing the aggregate size and percent of steel fiber

In reality, concrete structures are normally under various loadings, and results of different studies have shown that cracks in these structures and their materials, due to their nature as well as the loading type, do not develop along the crack plane (pure mode I); rather, they expand under mixed modes, making the crack growth studies under these modes a very important issue. In the crack growth phenomenon, the fracture toughness is a very effective parameter usually calculated by ENDB samples because they are easy to handle. In this study, several samples were made by changing the maximum aggregates size (dmax = 9.5, 12.5 & 19 mm) and the amount of hooked-end steel fibers (SF = 0.1, 0.3 & 0.5%), and tested under different loading modes (pure/mixed modes I and III) using the strain control jack device. According to the results, the lowest fracture toughness belonged to pure mode III, aggregates with dmax = 12.5 mm performed better in the self-compacting concrete reinforced with steel fiber, Also, the results show that the increasing trend of steel fibers does not have a positive effect on the fracture toughness performance.

A universal and accurate LPMI method for calculating mismatch in heterogeneous ice nucleation.

The interfacial correlation factor f(m,x), where m refers to the interaction among ice, water and the substrate and x refers to the ratio of the critical nucleation size to the surface topography characteristic size of the substrate, plays a crucial role in the classical theory of heterogeneous ice nucleation as it significantly impacts the energy of nucleation. Generally, a smaller value of f(m,x) indicates a higher propensity for ice nucleation. The degree of structural compatibility between ice and the substrate greatly influences f(m,x), particularly on specific substrates. Several approaches have been proposed to calculate the lattice matching based on this idea, which allows whether a surface is favorable for nucleation to be determined. However, none of these methods adequately correlates the mismatch index with ice growth phenomena. In this paper, we embarked on a new attempt to calculate the mismatch index by combining the lattice parameter and Miller index (LPMI). Droplet freezing experiments have been carried out on α-Al2O3 and silicon surfaces with different Miller indices to verify the rationality of the LPMI method. Furthermore, we validated the LPMI method extensively against other works and further demonstrated its readiness, accuracy and universality for freezing problems. The results consistently show that δd = 2|di - ds|/(di + ds) with interplanar spacing more accurately predicts heterogeneous ice nucleation rates across a wide range of substrates than δ1 = (ai - as)/ai with the lattice parameter of ice and the substrate and is more generally applicable than δ2D = (di - di)/di with the distances between two adjacent and congener atoms on the same plane. We believe that the proposed approach will aid in the selection of substrates for promoting or inhibiting heterogeneous nucleation on a specific substrate.

Universal scaling relations for growth phenomena

The Family–Vicsek (FV) relation is a seminal universal relation obtained for the global roughness at the interface of two media in the growth process. In this work, we revisit the scaling analysis and, through both analytical and computational means, show that the FV relation can be generalized to a new scaling independent of the size, substrate dimension d, and scaling exponents. We use the properties of lattice growth models in the Kardar–Parisi–Zhang and Villain–Lai–Das Sarma universality classes for 1⩽d⩽3 to support our claims.

WORK ENGAGEMENT AS A MEDIATING EFFECT OF PERSONAL RESOURCES ON PERFORMANCE: AN EMPIRICAL STUDY OF WOODCRAFT MSMEs EMPLOYEE

This study explores the phenomenon of MSMEs growth in Tulungagung, with a specific focus on the woodcraft sector. The objective is to understand the relationship between personal resources, work engagement, and employee performance within this MSME context. The sample comprises 126 respondents through purposive sampling. Data were analyzed using descriptive and inferential approach employing Structural Equation Model (SEM) with the SMART-PLS application. The findings indicate that personal resources have a positive impact on both work engagement and employee performance. Additionally, work engagement effectively mediates the influence of personal resources on performance. This study contributes to the understanding of human resource management in MSMEs, highlighting the significance of work engagement as an effective mediator for enhancing employee performance. The implications of this research can serve as a basis for developing human resource management strategies in MSMEs, specifically focusing on improving work engagement and optimizing employee personal resources.

Analysis of Urbanisation’s Relationship with Clean Water Supply Ecosystem Services in Sukoharjo Regency, Indonesia

The phenomenon of urban population growth is a global concern which will result in a decrease in the value of ecosystem services in an area. Sukoharjo Regency is an area affected by the development of Surakarta City; therefore, rapid growth is taking place. The objective of this study is to investigate the interplay between urbanization, ecosystem services, and the provision of clean water in Sukoharjo Regency in 2022. The methods used in the study were calculating the percentage of the urban population to determine the level of urbanisation, AHP and overlay to ascertain the ecosystem service score, together with cross-tabulation to establish the relationship between these two variables. The result of this study is that the level of urbanisation produces a pattern that districts in the north tend to comprise a higher level. The clean water supply ecosystem services in Sukoharjo Regency obtained results dominated by the low to medium level. The situation regarding the level of urbanisation and ecosystem services in Sukoharjo Regency reveals a relationship where an increase in the level of urbanisation will reduce the value of ecosystem services.

Natural resource curse and fiscal decentralization: Exploring the mediating role of green innovations and market regulations in G-20 economies

Nations possessing a surplus of natural resources often encounter economic instability and political misconduct due to their significant dependence on the exportation of these commodities. On the other hand, it is argued by several academics that the phenomenon known as the “resource curse” can be alleviated by utilizing proficient governance, commitment to ethical standards, and adept resource management. The objective of the study is to analyze the impact of fiscal decentralization (FD) and natural resource rents (NRR) on mitigating the resource curse phenomenon in the G-20 countries. It explores the role of new technologies and market rules as mediators in this process. The fiscal decentralization, technological advances and market rules have potential to create sustainable environment for efficient resource use and sustainable development. Thus, current study is important to investigate these links. The present study utilizes structural equation models to examine the correlation between the NRR and FD concerning economic growth. The dataset utilized for the study encompasses data from the G-20 economies, covering the period from 1995 to 2022. The study’s findings suggest that nations exhibiting a significant expenditure decentralization level experience a more pronounced resource-blessing effect. Nevertheless, the impact of this phenomenon is mitigated by market rules and advancements in decentralized tax collecting and income distribution systems. The impact of FD on gross domestic product (GDP), particularly in the context of Expenditure decentralization (ED), is generally beneficial. However, it is important to note that regulations and innovations can adversely affect this relationship. The underlying rationale behind this assertion is that an increase in market regulations results in a corresponding proliferation of market rules, impeding economic progress. The findings presented demonstrate the intricate nature of the association between the NRR, FD, and the phenomenon of economic growth. Moreover, the research outcomes demonstrate the significance of achieving a harmonious equilibrium among these three components to facilitate sustainable growth.

(Invited) Electrochemical Deposition for Applications in the Semiconductor Industry

This year (2023) marks the 25th anniversary of the “Damascene copper electroplating for chip interconnections” publication by P.C. Andricacos et al [1] detailing the dual-damascene process and Cu superfilling of complex structures. And even though this was neither the only electrochemistry contribution to the semiconductor industry nor the first time to report successful plating of Cu structures, it signaled that electrochemical deposition would play prominent role in downscaling race [2]. The authors described Cu superfilling of a feature having characteristic dimensions of about 1 micron. Since then, electrochemists have focused intensely on electrolyte development, optimization of deposition parameters, and improvements in plating tools and process chambers, which went hand in hand with downscaling of features to be filled. Cu was plated on resistive substrates and alternative seeds, various surface pretreatments were applied, and nucleation and growth phenomena studied [3-6], until the focus shifted to alternative metals, such as Co [7]. While Chemical vapor deposition (CVD) and Atomic layer deposition (ALD) offer viable alternatives to electrochemical deposition (ECD) in fabrication of interconnects having width of several nanometers, new challenges and opportunities in 3D packaging and stacking appeared on the horizon. This field resembles more a ‘landscape’ than a ‘one-way street’ that damascene nano-interconnects were. While on one hand downscaling is gaining momentum here, too, there is also upscaling. For example, electrochemically deposited mega-pillars have diameters and heights exceeding hundreds of microns. More than a decade ago, a competitive race started between chemistry suppliers, tool manufacturers and scientists in the field to achieve bottom-up Cu fill of through-Si-vias (TSV) [8], structures meant to provide interconnections between vertically stacked integrated circuits. These structures had characteristic sizes an order of magnitude larger than the ones described in [1]. After demonstrating that superfilling of TSV was indeed possible, it became imperative to satisfy a plethora of production-line requirements, such as optimization of plating time or control of the so-called Cu pumping, a plastic deformation of Cu upon annealing. Plastic deformation leads to an uneven top surface and challenges in stacking layers on top of each other and is, therefore, undesirable. Today, researchers are contemplating possible benefits of the plastic deformation in Cu structures to establish a more robust and reliable Cu-to-Cu bonding process. Achieving defect-free fill of features was never the only requirement to be satisfied, but the ability to control plastic deformation in Cu features, or fabricate structures with specific texture, grain size, crystal structure [9, 10] on sub-micron scale, might require more thorough modifications of the current Cu plating processes. We will review this and other current trends in electrochemical deposition for applications in ‘classical’ semiconductor industry. We will also consider possibilities in technologies for Quantum computing, where a new spectrum of non-traditional candidate elements for plating could emerge [11, 12]. There, lessons learned from the downscaling of traditional interconnects could prove very useful.

Void Growth Dynamics in Solid-State Batteries

Solid-state batteries (SSBs) can potentially offer improved energy density and safety, when compared to current lithium-ion batteries. Despite their irrefutable theoretical promise, further advancement of SSBs relies on developing a comprehensive understanding of various fundamental aspects including electro-chemo-mechanics, transport interactions, morphological evolution and related failure modes at solid-solid interfaces. Amongst the wide range of challenges, the formation and evolution of interfacial voids at the lithium-metal/solid-electrolyte interface during stripping is critical, due to its associated effect on internal short-circuit and cell failure during subsequent plating. The void growth phenomenon in SSBs is jointly determined by different factors such as the self-diffusion kinetics and mechanical response of lithium, reaction distribution at the solid-solid interface, and operating conditions such as external pressure and temperature. In this presentation, the pivotal role of reaction heterogeneity on the contact evolution process, along with key descriptors such as the lithium microstructure, surface morphology and contact percolation are discussed. The underlying asymmetry in terms of the competing electrochemical/mechanical processes and contact evolution during plating and stripping is highlighted. Lastly, the influence of non-uniformities in external pressure and temperature on the occurrence of disparate void growth patterns and electrochemical response is examined in this presentation.

Morpho-physiological, biochemical, and molecular responses of lettuce (Lactuca sativa L.) seedlings to chlortetracycline stress

Antibiotic contamination in soil is an emerging environmental problem due to its potential threat to the soil ecosystem. Among antibiotics, chlortetracycline (CTC) is widely used for livestock and accumulates in agricultural soil, leading to detrimental effects on various physiological and biochemical metabolic processes in crops. However, the adverse impacts of CTC on plants and their defensive mechanisms remain poorly understood. We aimed to investigate the physiological, biochemical, and molecular responses of lettuce to CTC toxicity and to understand better the regulatory mechanism influencing the growth and development of plants. In this study, lettuce seedlings were exposed to different CTC doses (0, 0.01, 0.1, 0.5, and 1 mg L–1) and grown for 4 weeks in a hydroponic system. The results showed that an initial CTC dose (0.01 mg L–1) induced a hormesis phenomenon in the seedling's growth accompanied by upregulation of anthocyanin production, and their biosynthesis and regulation-related genes (e.g., F3H, F3′H, DFR, UFGT, ANS, and MYB) were found upregulated. While increasing CTC doses displayed stimulated phenolic acid and flavonoid contents, it had negative impacts on plant growth and leaf fresh/dry biomass. A progressive increase in the contents of H2O2 and MDA in the plants was found as the CTC dose increased, while the relative water content (RWC) level decreased. The activities of antioxidant enzymes, like superoxide dismutase, catalase, ascorbate peroxidase, and peroxidase, displayed differential responses to CTC. In addition, CTC doses, especially at 0.5 and 1 mg L–1, tended to promote the production of abscisic acid and jasmonic acid, but salicylic acid remained unaltered. Overall, this study provides a new perspective insight into the toxic effects of CTC and the resilience mechanisms interlinked in lettuce plants' survival against antibiotic contamination.

Pertumbuhan Ekonomi Indonesia di Era New Normal

This research examines the phenomenon of Indonesia's economic growth in the context of the New Normal era. This era is marked by significant changes in daily life, especially in response to the global pandemic that has hit the world. The main focus of this research is to analyze the impact of the New Normal on Indonesia's economic growth, taking into account changes in consumption patterns, adaptation of the business sector, and economic policies implemented by the government. This research method involves analyzing macroeconomic data, opinion surveys, and case studies to understand changes in consumer behavior, business strategies, and economic policies taken by the government. The research results show that Indonesia, like other countries, experienced a significant economic transformation during the New Normal period. Although there are challenges such as a decline in economic activity in several sectors, this research also identifies new opportunities that are emerging, especially in the digital and sustainable sectors. In addition, this research provides policy recommendations for the Indonesian government to strengthen and accelerate economic recovery amidst the New Normal. These recommendations include strengthening digital infrastructure, increasing investment in sustainable sectors, as well as developing policies that support digital transformation and sustainable business adaptation. It is hoped that this research can contribute to stakeholders, researchers and policy makers in understanding the dynamics of Indonesia's economic growth in the New Normal era, as well as providing a basis for developing strategies to face this challenging future.

A unified explanation for variation of the grain growth exponent based on grain boundary migration kinetics

Based on molecular dynamics simulation on grain boundary migration, the large grain growth exponent extensively observed in high-purity nanocrystalline materials is proved to be ascribed to specific boundary migration kinetics determined. It is also found that temperature, topology of polycrystal and grain boundary type all affect the migration kinetics, which therefore causes the exponent to vary. The findings obtained in this work are capable of rationalizing various grain growth phenomena. In addition, triple junction drag against boundary migration has been evaluated and discussed.

Power law exponents for single bubbles growth in nucleate pool boiling at zero gravity

Nucleate pool boiling is an important boiling mode used in various fields of application. Bubble detachment and new bubble generation at the nucleation site is an important aspect of the process under terrestrial conditions. This sequence prevents prolonged observation of bubble growth phenomena. The problem can be circumvented by performing single bubble growth experiments under zero gravity conditions. Many experiments of this type are performed in a specially designed cell on board the International Space Station. Several combinations of boiling experimental parameters (pressure, heat flux, waiting time, degrees of subcooling) are tested. The bubble size evolution curve was found to represent the influences off the individual parameters best. Fitting attempts show that the experimental bubble growth curves can be nicely described by power law correlations. An analytical solution is given for the evolution of the liquid temperature field within the experimental test cell, in the absence of boiling incidents. It is shown that the time evolving difference between the solid/liquid interfacial temperature and the liquid saturation temperature is the basic factor that determines the bubble growth exponent. As an outcome, the whole experimental information on the bubble growth curves of 160 different boiling conditions is compressed in the form of tables that include the corresponding power law factors. These tables not only allow the reconstruction of the examined boiling curves but can also generate boiling curves in a dense grid of boiling conditions through interpolation of existing boiling data. The latter offers coherence and continuity in boiling computer codes over a broad range of conditions.

<i>In Situ</i> ALD-TEM System to Study Atomic Nucleation Phenomena - Enabled by Ultrathin Large Aspect Ratio Free-Standing Shell Structures

Today, Atomic Layer Deposition (ALD) sets the limits for achieving nanometer precision of thin, yet almost dense films. However, the initial growth process, determining possible film thinness, is poorly understood. A better understanding can be obtained with the help of in-situ characterization during film growth with high spatial and chemical resolution. Transmission Electron microscopy (TEM) would be a suitable and widely available technique to accomplish this objective. However, standard instruments have differing vacuum requirements than those necessary for ALD. During ALD, TEM detectors could be damaged as they are being exposed to corrosive volatile chemical compounds. Here we present a dedicated TEM holder design, where ALD deposition occurs inside a microchip containing a large area cavity surrounded by thin film Al2O3 membranes. These membranes act as windows for TEM characterization while decoupling the ALD process from the TEM environment. The microchip consists of longitudinal large overhang shell structures, themselves made by ALD and etched in an HF vapor etch processes. The set-up, which includes controlled heating, was tailored to ALD requirements, and passed a vacuum-pressure test. Post-mortem inspection of film growth on a silicon sample chip demonstrates the successful formation of an ALD Al2O3 film with 40 nm thickness inside the cavity. These results demonstrate the potential of the system to enable a range of experiments on growth phenomena that may lead to even thinner films and better control of interfaces than previously possible.

Microstructure evolution and strengthening mechanisms of electron beam welded 2219 aluminum alloy plate after hot spinning and heat treatment

To investigate the feasibility of spinning the welded aluminum alloys, hot spinning tests were conducted on the electron beam welded (EBWed) 2219 aluminum alloy thick plates at 400 °C and successfully obtained a 2.8 mm curved welded-spun plate with a total thickness reduction of 72 %. The abnormal grain growth (AGG) phenomenon of the base material during hot spinning could be observed due to the reduced pinning effect of the θ-Al2Cu phases and static recrystallization, while the fusion zone exhibited homogeneous recrystallized microstructure. After hot spinning, the yield strength of the base material increased from 89.3 MPa to 133.6 MPa and the yield strength of the joint increased from 93.1 MPa to 134.7 MPa. To further optimize the microstructure and improve the mechanical properties of the spun alloy, the subsequent solid solution and aging treatment were conducted. Most of the coarse θ particles dissolved into the matrix and a large quantity of needle-like θ′ precipitates were generated. The yield strengths of the base material and the joint increased to 213.1 MPa and 216.4 MPa, respectively, which was mainly attributed to the precipitation strengthening of the θ′ precipitates. The comparison between the calculated yield stress and the experimental results showed that the contributions of different strengthening mechanisms in strengths were reliable.