Intermediate Process Research Articles

Elucidating the Underlying Reactivities of Alternating Current Electrosynthesis by Time‐Resolved Mapping of Short‐Lived Reactive Intermediates

AbstractAlternating current (AC) electrolysis is an emerging field in synthetic chemistry, however its mechanistic studies are challenged by the effective characterization of the elusive intermediate processes. Herein, we develop an operando electrochemical mass spectrometry platform that allows time‐resolved mapping of stepwise electrosynthetic reactive intermediates in both direct current and alternating current modes. By dissecting the key intermediate processes of electrochemical functionalization of arylamines, the unique reactivities of AC electrosynthesis, including minimizing the over‐oxidation/reduction through the inverse process, and enabling effective reaction of short‐lived intermediates generated by oxidation and reduction in paired electrolysis, were evidenced and verified. Notably, the controlled kinetics of reactive N‐centered radical intermediates in multistep sequential AC electrosynthesis to minimize the competing reactions was discovered. Overall, this work provides direct evidence for the mechanism of AC electrolysis, and clarifies the underlying reasons for its high efficiency, which will benefit the rational design of AC electrosynthetic reactions.

Elucidation of Underlying Reactivities of Alternating Current Electrosynthesis by Time-resolved Mapping of Short-lived Reactive Intermediates.

Alternating current (AC) electrolysis is an emerging field in synthetic chemistry, while its mechanistic studies are challenged by the effective characterization of the elusive intermediate processes. Herein, we develop an operando electrochemical mass spectrometry platform that allows time-resolved mapping of stepwise electrosynthetic reactive intermediates in both direct current and alternating current modes. By dissecting the key intermediate processes of electrochemical functionalization of arylamines, the unique reactivities of AC electrosynthesis, including minimizing the over-oxidation/reduction through the inverse process, and enabling effective reaction of short-lived intermediates generated by oxidation and reduction in paired electrolysis, were evidenced and verified. Notably, the controlled kinetics of reactive N-centered radical intermediates in multi-step sequential AC electrosynthesis to minimize the competing reactions was discovered. Overall, this work provides direct evidence for the mechanism of AC electrolysis, and clarifies the underlying reasons for its high efficiency, which will benefit the rational design of AC electrosynthetic reactions.

Effect of a novel intermediate heat treatment process on abnormal grain growth in 2219 aluminum alloy friction stir welds

The abnormal grain growth occurs in 2219 aluminum alloy friction stir welds during solution treatment, which results in the deteriorating mechanical properties of the weld. In this paper, a novel intermediate heat treatment process after friction-stir welding, including rapid heating and high-temperature treatment at 560 °C and annealing treatments, was proposed to suppress abnormal grain growth in the weld during subsequent solution treatment. The effect of the intermediate heat treatment process on the microstructure and mechanical properties of the weld was investigated and analyzed. The results show that the grains in the nugget zone grow continuously in a short time at a temperature higher than the eutectic line. There is no abnormal grain growth in most regions of the weld treated with the intermediate heat treatment after solution treatment. Compared with tailor-welded blanks directly with solution treatment, the elongation of the tailor-welded blanks treated with the intermediate heat treatment and solution treatment increases from 13.5% to 20% because of the improvement of weld strength. The increase in mechanical properties is more significant after artificial aging treatment. Because of the disappearance of the pinning effect of particles at high-temperature treatment, abnormal grain growth induced by particles cannot occur. The grains grow normally, improving their ability to resist abnormal grain growth during solution treatment. Fine grains result in a more uniform distribution of deformation in the solution-treated weld. Furthermore, it is more difficult for the particles at the grain boundary to cause crack propagation along the grain boundary after artificial aging treatment. This work helps guide how to suppress abnormal grain growth in the weld and further deepen the understanding of the phenomenon.

Economic competitiveness of pultruded fiber composites for wind turbine applications

Pultrusion manufacturing of fiber reinforced polymers has been shown to yield some of the highest mechanical properties for unidirectional composites, having a high degree of fiber alignment with consistent performance. Pultrusions offer a low-cost manufacturing approach for producing unidirectional composites with a constant cross-section and are used in many applications, including spar caps of wind turbine blades. However, as an intermediate processing step for wind blades, the additional cost of manufacturing pultrusions must be accompanied by sufficient increases in mechanical performance and system benefits. Wind turbine blades are manufactured using vacuum-assisted resin transfer molding with infused unidirectional fiberglass or carbon pultrusions for the spar cap. Infused fiberglass composites are among the most cost-effective structural materials available and replacing this material in the cost-driven wind industry has proven challenging, where infused fiberglass spar caps are still the predominant material system in use. To evaluate alternative material systems in a pultruded composite form, it is necessary to understand the costs for this additional manufacturing step which are shown to add 33%–55% on top of the material costs. A pultrusion cost model has been developed and used to quantify cost sensitivities to various processing parameters. The mechanical performance for pultruded composites is improved versus resin-infusion manufacturing with a 17% increase in design strength at a constant fiber volume fraction, but also enables higher achievable fiber volume fractions. The cost-specific mechanical performance is compared as a function of processing parameters for pultruded composites to identify the opportunities for alternative material and manufacturing approaches for wind turbine spar caps. Four materials are compared in a representative wind turbine blade model to assess the performance of pultruded carbon fiber systems and pultruded fiberglass relative to infused fiberglass, where the pultruded systems produce lower weight blades with various cost distinctions.

Intermediate temperature tensile behavior and processing map of a spray formed 7075 aluminum alloy

The intermediate temperature deformation behavior and microstructural evolution of a spray formed 7075 Al alloy were performed at temperatures 60–120 °C with strain rates 0.00001–0.1 s−1. The results reveal that the softening mechanism of the intermediate temperature deformation is dynamic recovery (DRV), which can be quantitated by Zener-Hollomon (Z) parameter. The constitutive equation can reasonably predict the stress-strain behavior of the alloy at intermediate temperatures. The activation energy is related to the deformation process and the interactions of the substructure, the average value is 140.1 kJ/mol. The higher efficiency of power dissipation in the processing map is related to the DRV at lower deformation temperatures. The optimum processing domain is located at the temperature of 90–120 °C and strain rate of 0.006–0.1 s−1 with a power dissipation efficiency range of 20%–40%. The processing parameters of the intermediate temperature deformation should be strictly controlled according to the strain. The uniform microstructure of 7075 alloys obtained by spray forming is crucial to overcome the disadvantage of poor deformability. The inferior coordinated deformation facilitates crack propagation at low strain rates. The high-density dislocation provides adequate nucleation sites for dynamic precipitation. The level of dynamic restoration facilitates the transformation from low angle grain boundaries (LAGBs) to high angle grain boundaries (HAGBs). The dislocations move to the grain/sub-grain boundary to form dislocation walls at low temperatures. The contribution to the stress from grain boundary (13.2–17.7 MPa), nanoscale precipitates (65.7–191.5 MPa), and dislocation (5.9–23.4 MPa) increases the difficulty of deformation. The deformation process at higher temperatures (105–120 °C) can be facilitated by the dissolution and coarsening of the nanoscale precipitates, and dislocation motion at the grain boundary.

Turbulence of the Fin-de-siècle: Arts Through the Looking-Glass of Intermediality

This paper addresses the fin-de-siècle period as a time when most of what are called intermedial processes, that is to say, those processes that arbitrate aesthetic design at the intersection between different media, began to play a substantial role in the production of cultural artifacts. The epoch is investigated through the prism of intermediality, which manifested itself as a valuable tool in the development of the arts and media, particularly after the birth of photography and cinematography. These intermedial processes fostered a media-based creative experimentation that culminated in the modernist and postmodernist movements. The role of intermediality in the fin-de-siècle, particularly in light of the syncretic processes it originated, is considered as an aftereffect of the tumultuous events of the time, which in a way acted as a stimulus for this new-fangled aesthetics. The paper concludes that the turbulence that characterizes this epoch, as well as the diffusion of new artistic and philosophical movements, impacted the development of mixed (intermedial) arts, stimulated their growth and activated the exploration of intermedial forms and genres in all the arts. This is the era of mass publishing and the growth of literacy rates, an era that laid the foundations for future theories on intertextuality and the idea of the work of art as an inclusive “canvas” inside of which all media have a place.

Agronomic and environmental aspects of organo-mineral fertilizers produced with a by-product of the intermediate process of tanning

IntroductionThe by-product of the intermediate process of tanning (BPIPT) can be used in the manufacturing of environmentally-friendly organo-mineral fertilizers (OMF). However, the presence of potentially toxic elements (e.g., chromium, Cr), can hinder the use of BPIPT in agriculture. This study aimed: i) to evaluate soil chemical and biological properties following the application of fertilizers produced with a BPIPT, in contrast to other OMF produced with traditional organic matrices; and ii) to assess the impacts of such products on wheat growth and nutrition.MethodsSamples (0-0.2 m) of two Oxisols [Red-Yellow Latosol (LVAd) and Red Latosol (LVd)] were used in this study, consisting of two experiments (with five treatments and five replicates) using different OMF, in a sequence: 1) incubation of fertilizers in soil samples for 30 days, and 2) wheat cultivation (30 days) after the fertilizer incubation. The treatments consisted of an arrangement of mineral fertilizers based on nitrogen, phosphorus, and potassium (NPK fertilizers), associated with OMF based on BPIPT (OM-IPT and OM-IPT+S) or commercial manure (OM-CM and OM-CM+S), with or without sulfur (S), and a control treatment. Elemental availability in soils and microbial attributes were determined after the incubation of the OMF in the soils. After wheat cultivation, plant biomass, nutritional composition, β-glucosidase activity, and fluorescein diacetate hydrolysis (FDA) were measured.Results and discussionThe application of BPIPT-derived OMF in the present study increased available Cr fraction contents in both soils. However, OM-IPT caused low soil acidification, enhanced wheat growth and nutrition, and stimulated microbial activity in soils (FDA and β-glucosidase), thus evidencing the agronomic and environmental benefits of this OMF and their potential to contribute to a cleaner, more sustainable agriculture.

Functional modules for visual scene segmentation in macaque visual cortex

Segmentation, the computation of object boundaries, is one of the most important steps in intermediate visual processing. Previous studies have reported cells across visual cortex that are modulated by segmentation features, but the functional role of these cells remains unclear. First, it is unclear whether these cells encode segmentation consistently since most studies used only a limited variety of stimulus types. Second, it is unclear whether these cells are organized into specialized modules or instead randomly scattered across the visual cortex: the former would lend credence to a functional role for putative segmentation cells. Here, we used fMRI-guided electrophysiology to systematically characterize the consistency and spatial organization of segmentation-encoding cells across the visual cortex. Using fMRI, we identified a set of patches in V2, V3, V3A, V4, and V4A that were more active for stimuli containing figures compared to ground, regardless of whether figures were defined by texture, motion, luminance, or disparity. We targeted these patches for single-unit recordings and found that cells inside segmentation patches were tuned to both figure-ground and borders more consistently across types of stimuli than cells in the visual cortex outside the patches. Remarkably, we found clusters of cells inside segmentation patches that showed the same border-ownership preference across all stimulus types. Finally, using a population decoding approach, we found that segmentation could be decoded with higher accuracy from segmentation patches than from either color-selective or control regions. Overall, our results suggest that segmentation signals are preferentially encoded in spatially discrete patches.

Regulating the Intermediate Process of Zinc–Bismuth Batteries by Iodide Ions

Regulating the Intermediate Process of Zinc–Bismuth Batteries by Iodide Ions

All-Optical Electrochemiluminescence.

Electrochemiluminescence (ECL) is widely employed for medical diagnosis and imaging. Despite its remarkable analytical performances, the technique remains intrinsically limited by the essential need for an external power supply and electrical wires for electrode connections. Here, we report an electrically autonomous solution leading to a paradigm change by designing a fully integrated all-optical wireless monolithic photoelectrochemical device based on a nanostructured Si photovoltaic junction modified with catalytic coatings. Under illumination with light ranging from visible to near-infrared, photogenerated holes induce the oxidation of the ECL reagents and thus the emission of visible ECL photons. The blue ECL emission is easily viewed with naked eyes and recorded with a smartphone. A new light emission scheme is thus introduced where the ECL emission energy (2.82 eV) is higher than the excitation energy (1.18 eV) via an intermediate electrochemical process. In addition, the mapping of the photoelectrochemical activity by optical microscopy reveals the minority carrier interfacial transfer mechanism at the nanoscale. This breakthrough provides an all-optical strategy for generalizing ECL without the need for electrochemical setups, electrodes, wiring constraints, and specific electrochemical knowledge. This simplest ECL configuration reported so far opens new opportunities to develop imaging and wireless bioanalytical systems such as portable point-of-care sensing devices.

Role of δ-phase on Mechanical Behaviors of Additive Manufactured Inconel 718: Detailed Microstructure Analysis and Crystal Plasticity Modelling

In this work, a multi-scale approach was applied to reveal the evolution mechanisms of the δ (Ni3Nb) phase and the resultant mechanical responses in wire-arc additive manufactured (WAAM) Inconel (IN) 718. Several heat treatment strategies, consist of homogenization, intermediate heat treatment and aging process, were firstly conducted to produce δ phases with different characteristics. The early evolution of the δ phase was then analyzed in detail via transmission electron microscopy. The nanoindentation and tensile tests were also used to verify the strengthen response of δ phase. Moreover, a crystal plasticity finite element (CPFE) model, taking into account the different configurations of δ phase, was developed to study and predict the micro deformation behavior. Results revealed that when the intermediate heat treatment time exceeded 1 h, the formation of the main strengthening phase γ" was constrained by the δ phase, accompanied by the coarsening of γ". The decrease of γ" phase and the destruction of coherent γ"/γ interface are the main causes of strength loss in the WAAMed IN718. The intergranular dislocation transmission was hindered by the δ phase, thereby increasing the grain boundary strength. However, the needle-like δ phase within the grain may cause premature fracture due to strain localization, thereby reducing the material properties. The evolution mechanisms of the δ phase obtained in this study provides theoretical guidance for the optimization of the microstructures and mechanical properties of WAAM Inconel 718.

Fully automated AI-based cardiac motion parameter extraction – application to mitral and tricuspid valves on long-axis cine MR images

PurposeIn cardiac MRI, valve motion parameters can be useful for the diagnosis of cardiac dysfunction. In this study, a fully automated AI-based valve tracking system was developed and evaluated on 2- or 4-chamber view cine series on a large cardiac MR dataset. Automatically derived motion parameters include atrioventricular plane displacement (AVPD), velocities (AVPV), mitral or tricuspid annular plane systolic excursion (MAPSE, TAPSE), or longitudinal shortening (LS). MethodTwo sequential neural networks with an intermediate processing step are applied to localize the target and track the landmarks throughout the cardiac cycle. Initially, a localisation network is used to perform heatmap regression of the target landmarks, such as mitral, tricuspid valve annulus as well as apex points. Then, a registration network is applied to track these landmarks using deformation fields. Based on these outputs, motion parameters were derived. ResultsThe accuracy of the system resulted in deviations of 1.44 ± 1.32 mm, 1.51 ± 1.46 cm/s, 2.21 ± 1.81 mm, 2.40 ± 1.97 mm, 2.50 ± 2.06 mm for AVPD, AVPV, MAPSE, TAPSE and LS, respectively. Application on a large patient database (N = 5289) revealed a mean MAPSE and LS of 9.5 ± 3.0 mm and 15.9 ± 3.9 % on 2-chamber and 4-chamber views, respectively. A mean TAPSE and LS of 13.4 ± 4.7 mm and 21.4 ± 6.9 % was measured. ConclusionThe results demonstrate the versatility of the proposed system for automatic extraction of various valve-related motion parameters.

New insights into triazole fungicide-caused hematopoietic abnormality in zebrafish based on GRα screening developmental toxicity

Triazole fungicides (TFs) are known to be common environmental contaminants that can be toxic to aquatic animals, but their developmental toxicity is not fully understood. To address this gap, we first used a glucocorticoid receptor α (GRα)-mediated dual luciferase reporter gene system to explore the possible development toxicity of ten TFs and found that flusilazole (FLU) exhibited stronger agonistic activity against GRα. Subsequent transcriptome sequencing showed that FLU exposure affected GRα activation and hematopoiesis associated with a variety of biological processes, including responses to corticosteroid release, embryonic hematopoiesis, erythroid differentiation, and the development of hematopoietic or lymphoid organs. Furthermore, based on in situ hybridization and staining techniques, we clarified that FLU decreased the expression of the primitive hematopoietic marker genes gata1 and pu.1. and caused the defects in the posterior blood island (PBI), thereby impacting intermediate hematopoietic processes. Also, FLU significantly reduced the expression of the crucial hematopoietic gene cmyb and disrupted the production of erythrocytes and bone marrow cells during definitive hematopoiesis. Consistently, we found that FLU induced lesions in the kidney, a hematopoietic organ, including the infiltration of inflammatory cells, tubular collapse, reduced tubular filtration area, and interstitial hydronephrosis. We also found that FLU increased aberrant red blood cells in the peripheral blood of zebrafish. These findings provide new insights into the developmental toxicity and ecotoxicological risk of TFs.

Green and sustainable biomass supply chain for environmental, social and economic benefits

Bioenergy is a clean and renewable source of energy that can reduce global depency on fossil fuel, and it is a sustainable, economically viable, and socially acceptable. Bioenergy production aligns with several United Nations Sustainable Development Goals (SDGs) directly or indirectly. Bioenergy feedstocks are spatio-temporally distributed and, therefore, design of a green and sustainable Biomass Supply Chain (BSC) is pivotal for effective commercialization of bioenergy. The BSC starts with biomass harvest and includes collection, processing, storage, and transportation as intermediate processes and ends with biomass delivery at the conversion facilities. All these processes are spatially interlinked. Cost-effective bioenergy generation requires an effective and efficient BSC model. The absence of such model is the major cause of failure of bioenergy plants. With this backdrop, this paper reviewed literature related to BSC, and its elements. The elements are then linked with emissions, economy, and socio-cultural aspects to draw a wider picture of bioenergy for sustainable development. The challenges associated with bioenergy are elucidated with in-depth discussion. The analysis shows that green and sustainable BSC can be a major tool to achieve UN SDGs in many ways. On the contrary, present situation of BSC is challenging from multiple perspectives: environmental, socio-cultural, economic, policy, institutional as well as technological challenges. To achieve global deployment of bioenergy with net zero emissions target, use of advanced and emerging tools and techniques like artificial intelligence, machine learning, remote sensing & GIS, Life Cycle Assessment (LCA) and Bioenergy with Carbon Capture and Storage (BECCS) is recommended.

Nonlinear Stress-Free-State Forward Analysis Method of Long-Span Cable-Stayed Bridges Constructed in Stages

Structural analysis and construction control of staged-construction processes are major subjects in the context of modern long-span bridges. Although the forward and backward analysis methods are able to simulate situations, their main disadvantage is that they usually apply the stage superposition principle. In the actual construction process, due to changes made to the plan, the construction process needs to be adjusted at any time, and it is difficult to implement the construction process in complete accordance with the established plan. As a result, the existing simulation method based on the incremental structural analysis of each construction stage has poor adaptability to such adjustments. In this study, considering the strong geometric nonlinear behavior of the long-span cable-stayed bridge construction process, the geometrically nonlinear mechanical equations of the staged-construction bar system structure were derived. The minimum potential energy theorem was used by introducing the concept of the stress-free-state variable of the structural elements. The equation reflects the influence of the change in the stress-free-state variables of structural elements on the completion state of the structure. From the analysis of the geometrical condition that the equilibrium equation holds, the stress-free installation condition of the closing section of the planar beam element structure was obtained. A new simulation method for long-span cable-stayed bridge construction has been proposed, which is called the stress-free-state forward analysis. This method can directly obtain the intermediate process state of cable-stayed bridge construction without performing stage-by-stage demolition calculations, and causing the internal force and deformation of the completion state to reach the design target state. This method can realize the simulation of multi-process parallel operation in construction, and solves the problem of automatic filtering of temporary loads. To illustrate the application of the method, a long-span cable-stayed bridge was analyzed.

IDENTIFICATION OF BENZOIC ACID BY GC AND MASS SPECTROMETRY

Benzoic acid is an aromatic carboxylic acid naturally present in plant and animal tissues which can also be produced by microorganisms. Benzoic acid and a wide range of derivatives and related benzenoid compounds, such as salts, alkyl esters, parabens, benzyl alcohol, benzaldehyde and benzoyl peroxide, are commonly used as antibacterial and antifungal preservatives and as flavouring agents in food, cosmetic, hygiene, and pharmaceutical products. Benzoic acid (BA) is a commonly used antimicrobial preservative in food and beverages, especially in carbonated beverages, as it presents in its strongest antibacterial activity at pH 2.5–4.0. BA has inhibitory effects on the proliferation of bacteria and yeasts, a major cause of food spoilage. Although the addition of BA can extend the shelf life of drinks and prevent nutritional losses.Excessive intake of BA may cause diarrhea, abdominal pain, and other symptoms and even interfere with the intermediate metabolic processes of the body.

온라인 쇼핑 사업자의 온라인 상품 진열 관련 행위에 대한 공정거래법상 불공정거래행위 규정의 적용

The online product display method of online shopping operators basically has a common characteristic with the product display method of offiine large-scale retailers, and requires a search function as a decision aid provided for the purpose of helping consumers smoothly purchase due to the unique characteristics of the Internet shopping environment. However, this search function has a difference with the search function of a search setvice in which what the user wants is the search result itself for the purpose of providing information in that the search result is used as an intermediate process to check whether the product the customer wants is in stock and the location for the purpose of making a purchase decision. In addition, in that the online shopping operator's search function is a function related to the online product display method, it can be used similarly to the sales promotion activities of offiine large-scale retailers by displaying products on their shelves. Online shopping operators make specific adjustments to the algorithm applied to the recommendation system to promote sales by exposing certain products prominent on the search result screen. In this study, it was critically reviewed whether the conduct m which private brand('PB') products are exposed prior to products sold by third parties as a result of specific adjustments to the algorithm by combining the search function with the recommendation function for sales promotion by online shopping operators could be treated as a self-preferencing and unfair trade practices provision in the Monopoly Regulation and Fair Trade Act(“MRFTA”) could be applied to the conduct. Among the types of unfair trade practices, discrimination of trade terms and unfair customer inducement by deception, which are the conduct types that the Korea Fair Trade Commission applied to the behavior treated as a self-preferencing in other cases, and the principle of judging the impediment to fair trade common to the conduct types were reviewed from the interpretative perspective. Based on this review, as a hypothetical case, if a online shopping company makes specific adjustments to the algorithm as part of its sales promotion activities, and as a result, the company's PB products are exposed prominent in consumer search results than products sold by third parties, it was shown that the application of the unfair trade practices provision leads to some interpretation difficulties, and that a cautious approach is needed to determine impediment to fair trade.

Study on intermediate annealing process of thermal mechanical treatment of 7185 alloy with two stage deformation

This study investigated the effect of intermediate annealing (IA) during a special thermo-mechanical treatment on the microstructure and properties of 7185 Al alloy. The results show that after IA, many sub-structures are formed in the alloy and many particles are precipitated. The particle size increases and the width of the dislocation wall becomes narrower with increasing IA time and temperature. After the second stage of deformation, the dislocations are ordered again and generate micro shear bands (MSBs). The final T6 treated alloy under IA2 process (holding time for 40 min at 400 °C) has good plasticity and corrosion resistance. The tensile strength is 523 MPa, the yield strength is 458 MPa, the elongation is 17.6%, the depth of intergranular corrosion layer is 15.6 μm, and the corrosion grade after 6 and 12 h exfoliation corrosion is N, PC.

Age and Sex Differences in the Associations Among Socioeconomic Status, Affective Reactivity to Daily Stressors, and Physical Health in the MIDUS Study.

Low socioeconomic status (SES) is robustly associated with increased risks of morbidity and mortality. Affective reactivity to daily stressors has been proposed to be a mediator for this association. However, few longitudinal studies have empirically tested the indirect effect of SES on health through affective reactivity to daily stressors. This study aimed to test the indirect effect of SES on physical health via affective reactivity to daily stressors over a 10-year period and to explore age and sex differences in such indirect effect. Data were drawn from a subsample of 1,522 middle-aged and older adults (34-83 years of age, 57.2% female, 83.5% White) from the Midlife in the United States study. SES (i.e., education, household income, indicators of financial distress) was assessed in 2004-2006. Affective reactivity to daily stressors was computed using data collected during the 8-day daily stress assessment in 2004-2009. Self-reported physical health conditions were assessed in 2004-2006 and 2013-2014. There was a significant indirect effect of lower SES on more physical health conditions via elevated negative affective reactivity to daily stressors among women but not men. The indirect effect of SES on physical health conditions via negative affective reactivity to daily stressors was consistent across the middle and older adulthood. Our findings suggest that negative affective reactivity to daily stressors might be a key intermediate process contributing to persistent SES disparities in physical health, particularly among women.

Design and development of SS316L-IN718 functionally graded materials via laser powder bed fusion

In this study, the capability of the standard laser powder bed fusion process for the fabrication of SS316L-IN718 functionally graded materials with different designs was investigated. In addition to the successful demonstration of producing dense parts with minimal defects, the gradual evolution of the solidification structure from cellular to the dendritic, the smooth distribution of constituent elements, and the orientation and grain growth in the build direction were analyzed and discussed. Finally, we report that the gradient design with a 50 wt% mixed intermediate zone and optimum processing condition showed the best mechanical properties with a tensile strength of about 610 MPa and 31.5 % total elongation.