Heat Treatment Regimes Research Articles

REGULATIONS OF THE FORMATION OF BAINETIC COMPONENT MATRIX IN ECONOMY ALLOYED CHROMO-MANGANESE ALLOYS

Purpose. The purpose of the investigation is to establish the regularities of the kinetics of supercooled austenite decomposition in the bainite temperature range (400−200 °C) in chromium-manganese cast iron for the development of thermal hardening regimes that increase the service life of products. Methodology. The object of the study are samples of research and industrial smelting of chrome-manganese cast iron containing 3,1 % carbon, 13,1 % chromium, and 15,75 % manganese. The study of the supercooled austenite decomposition kinetics was carried out by the dilatometric method in the temperature range of 400−200 °C, the study of the microstructure, phase composition, as well as the measurement of microhardness and hardness was carried out according to standard methods. Scientific novelty. The peculiarities of the supercooled austenite decomposition kinetics in the bainite temperature range (400−200 °С) in chromium-manganese cast iron were determined, the structure of the cast iron after aging consists of eutectic carbides Me (Cr, Mn, Fe)7C3, products of austenite decomposition, secondary carbides Me (Cr, Mn, Fe)7C3, Me (Cr, Mn, Fe)3C, as well as untransformed austenite in the amount of 70...75 %. The maximum hardness of the experimental cast iron was established during isothermal exposure at 350 °C for 35 hours. Practical value. The established regularities of the chromium-manganese cast iron structure formation and the determined and optimized temperature-time intervals of the supercooled austenite isothermal decomposition in cast iron are the basis for the development of heat treatment regimes to increase the strength, wear resistance of the material and the service life of its products.

OPTIMIZING POROUS MATERIALS WITH PREDICTION THERMAL PHYSICAL CHARACTERISTICS

The article presents experimental data, based on which the influence of various factors on the strength and thermophysical characteristics of porous heat-insulating materials was studied.
 Porous bodies in thermal power engineering are used for thermal protection of power plants, various aggregates, in thermal insulation structures of buildings and technological networks. The properties of these materials and the field of use depend on their chemical composition and method of production.
 The task of this research is to obtain a raw material mixture for heat-insulating material of the closed-cell type with increased thermal resistance and porosity by optimizing its qualitative and quantitative composition. The goal is also to improve the method of obtaining porous heat-insulating material by changing the temperature and time regimes in order to improve the physical, mechanical and operational characteristics, which will allow the material to be used in a wider temperature range.
 Based on the dependences of strength and thermophysical properties on the density of the finished material obtained in the work, it was concluded that the best characteristics are the samples of the porous material with the lowest density, which are formed at the maximum humidity of the raw material. Kinetics of drying and heat treatment of the raw material mixture, thermal regimes are the main factors that determine the porosity, strength and thermal conductivity of the finished heat-insulating material.
 Performed laboratory studies of the material proposed in the paper allow choosing the required temperature regimes of heat treatment. Thus, the task of further research is to choose a method of organizing effective heat and mass exchange, modeling these processes, experimental testing of the obtained data, and creating a method for determining the main technological and structural parameters of the method of obtaining a new material.
 The performed experimental studies made it possible to determine the conditions for the implementation of new technologies for the production of porous materials with the possibility of predictive determination of their properties.

Effect of heat treatment on mechanical properties and the structure of the tin-free aluminum bronze

Nowadays bronze products have quite high demand, for example, bronze liners, bushings, flanges, etc. Bronze is a rather malleable antifriction material with good corrosion resistance. Depending on the different methods of melting and processing bronze, it is possible to increase strength properties and reduce cost of production of bronze products. There are various types of tin-free bronze, such as aluminum, lead, beryllium, manganese, magnesium, chromium, zirconium, cadmium, silicon, bronze. In this article, cast tin-free bronzes produced by two casting methods, such as casting in a casting mold and casting on gasifiable models (CGM), are considered. The advantages and disadvantages of each method are analyzed. Experimental regimes of heat treatment during CGM were developed and tested. The tests of mechanical characteristics are carried out on prototypes and a full-fledged liner that is used in the nodes of a spindle device. The microstructure of samples during CGM before and after heat treatment is studied. Dependence of time resistance, relative, elongation, hardness and impact toughness on various heat treatment modes was studied. A general comparative analysis of mechanical properties depending on the method of melting and processing of bronze samples was also carried out. The economic calculation was carried out, which revealed the economic effect of CGM with further heat treatment. The heat treatment regimes have been developed, which make it possible to use the CGM casting method for inserts with obtaining mechanical properties at the level of casting into the mold according to GOST 493‒79.

Effect of heat treatment on mechanical properties and the structure of the tin-free aluminum bronze

Nowadays bronze products have quite high demand, for example, bronze liners, bushings, flanges, etc. Bronze is a rather malleable antifriction material with good corrosion resistance. Depending on the different methods of melting and processing bronze, it is possible to increase strength properties and reduce cost of production of bronze products. There are various types of tin-free bronze, such as aluminum, lead, beryllium, manganese, magnesium, chromium, zirconium, cadmium, silicon, bronze. In this article, cast tin-free bronzes produced by two casting methods, such as casting in a casting mold and casting on gasifiable models (CGM), are considered. The advantages and disadvantages of each method are analyzed. Experimental regimes of heat treatment during CGM were developed and tested. The tests of mechanical characteristics are carried out on prototypes and a full-fledged liner that is used in the nodes of a spindle device. The microstructure of samples during CGM before and after heat treatment is studied. Dependence of time resistance, relative, elongation, hardness and impact toughness on various heat treatment modes was studied. A general comparative analysis of mechanical properties depending on the method of melting and processing of bronze samples was also carried out. The economic calculation was carried out, which revealed the economic effect of CGM with further heat treatment. The heat treatment regimes have been developed, which make it possible to use the CGM casting method for inserts with obtaining mechanical properties at the level of casting into the mold according to GOST 493‒79

Effect of heat treatment on the content of microorganisms in drinking milk

The microflora of raw milk is in the center of constant attention at the enterprises where it is processed. Since the microbiota of pasteurized milk is determined by the percentage of heat-resistant bacteria that are present in the milk raw material. Defects during storage are associated with the development of residual microflora of pasteurized products. The aim of the work was to determine the quantitative changes in milk microflora using different pasteurization temperatures. Pasteurization of raw milk of the first and extra grades was carried out at t = +72 °С and t = +91 °С with a holding time of 15–20 s. In pasteurized and raw milk, the residual amount of microorganisms of different groups was determined: mesophilic, psychrotrophic, lactic acid, heat-resistant, and spore-forming. It was found that in raw milk before pasteurization, the main part of the microflora was psychrotrophic and mesophilic microorganisms up to 70%, the share of lactic acid microbiota was up to 25%, heat-resistant and spore-forming bacteria were 4% and 0.8%, respectively. The temperature regime of heat treatment (t = 72 °C exposure for 20 s) contributed to the reduction of mesophilic bacteria by 93.4% when using extra grade milk and by 91.5% when using first grade milk. That is, almost 6.4 times more bacteria remain in drinking milk when raw materials of lower quality are used. The intensity of death of heat-resistant microflora of milk under the regime of 72 °C with a holding time of 20 s was only 15.2 % when using raw extra milk and 4.2 % (first). Pasteurization at a temperature of 91 °C for 20 seconds had a much stronger effect on this microflora, as its efficiency was 52.9 % and 49.2 %. That is, the efficiency of the pasteurization mode was 3.5 and 11.7 times stronger, respectively, compared to the mode at a temperature of 72 °C. Therefore, in order to apply an effective pasteurization regime at the enterprise, it is necessary to know the quantitative and qualitative composition of the microflora of raw milk.

Influence of rare earth metals on volumetric characteristics of Al-Ni-Co-R alloys in crystalline and liquid states

Density of Al-Ni-Co-R (R = Nd, Sm, Gd, Tb, Yb) glass-forming alloys is studied experimentally by gamma-absorption method in a wide temperature range including crystalline and liquid states. Molar volumes and thermal expansion coefficients are calculated from the experimental data. It is shown that these melts remain strongly microheterogeneous systems at small overheatings above liquidus. Some regimes of melt heat treatment before quenching are discussed.

Influence of Aging Treatment Regimes on Microstructure and Mechanical Properties of Selective Laser Melted 17-4 PH Steel

Aging is indispensable for balancing the strength and ductility of selective laser melted (SLM) precipitation hardening steels. This work investigated the influence of aging temperature and time on the microstructure and mechanical properties of SLM 17-4 PH steel. The 17-4 PH steel was fabricated by SLM under a protective argon atmosphere (99.99 vol.%), then the microstructure and phase composition after different aging treatments were characterized via different advanced material characterization techniques, and the mechanical properties were systematically compared. Coarse martensite laths were observed in the aged samples compared with the as-built ones, regardless of the aging time and temperature. Increasing the aging temperature resulted in a larger grain size of the martensite lath and precipitation. The aging treatment induced the formation of the austenite phase with a face-centered cubic (FCC) structure. With prolonged aging treatment, the volume fraction of the austenite phase increased, which agreed with the EBSD phase mappings. The ultimate tensile strength (UTS) and yield strength gradually increased with increasing aging times at 482 °C. The UTS reached its peak value after aging for 3 h at 482 °C, which was similar to the trend of microhardness (i.e., UTS = 1353.4 MPa). However, the ductility of the SLM 17-4 PH steel decreased rapidly after aging treatment. This work reveals the influence of heat treatment on SLM 17-4 steel and proposes an optimal heat-treatment regime for the SLM high-performance steels.

Structure formation and properties of sheet structural steels in the modes of ordinary and combined heat treatment with exposure in the intercritical temperature range

The features of the structure, the nature of the distribution of alloying elements and impurities between the structural components of sheet low-alloy steels that have undergone heat treatment with exposure in the intercritical temperature interval (ICTI), the structure formation and mechanical properties of these steels after the combined regimes of heat treatment with exposure in the ICIT were investigated. The analysis of the distribution of elements among the structural components of the studied low-alloy steels allowed us to establish that during heat treatment with direct exposure in the ICTI, such elements as manganese, chromium, aluminum, vanadium, sulfur, and phosphorus are concentrated mainly in the strengthening martensitic-bainite phase, while nickel, silicon and titanium are evenly distributed between the strengthening phase and ferrite. The conducted research on the example of sheet low-alloy steel 14G2 shows that the effects of grinding of ferritic grain, peаrlitic and martensitіс (bainite) components during combined processing with exposure in ICTI can be caused by implementation at low (450-550ºС) temperatures of isothermal decomposition the mechanism of multiple nucleation of ferrite microcrystals. It was established that the combined regimes with exposure in ICTI allow, without the application of hardening and tempering operations, to achieve in sheet low-alloy steel 14G2 mechanical properties at the level of strength class 390 according to DSTU 8541:2015 with yield strength values of 422-425 МPа and with high plasticity and impact viscosity Therefore, the use of these modes in a modified form can be recommended for the creation of end-to-end energy-saving technologies of heat treatment with exposure in the ICTI of low-alloyed steel sheet in the flow of thick-sheet mills equipped with normalization units. Keywords: structure formation, intercritical temperature interval, isothermal decomposition, martensitic-bainite phase, combined regime.

Effect of heat treatment regime on microstructure and phase evolution of AlMo0.5NbTa0.5TiZr refractory high entropy alloy

This paper reports the effect of heat treatment process on the ensuing microstructure evolution, and hardness variation of a cast and homogenized AlMo0.5NbTa0.5TiZr refractory high-entropy alloy (RHEA). Heat treatments were carried out on the homogenized samples at 1000, 1100, and 1200 °C for 10, 24, and 48 h. It was revealed that the phase decomposition in the alloy took place in a much shorter time than that reported in the literature. The significant tendency of Zr and Ti in respect of separation from the solid solution was found as the main reason for the formation of multi-phase structure and causing thermal instability. The phase decomposition occurred though the formation of Zr-rich needle-like phase constituents and Ti-rich globular ones. The semi-stable Zr-rich phase constituents are believed to form on B2 lamellas, and during their growth, the crystal structure gradually transforms from body-centered cubic (BCC) to a hexagonal close-packed (HCP) configuration. The electron back-scattered diffraction (EBSD) analyses confirmed that the HCP phase fraction increased significantly with increase in annealing temperature and/or time. A remarkable increase of 78% in Vickers hardness was measured for the sample heat treated at 1100 °C for 24 h compared to that of the homogenized state. It turned out that the morphology, size, interface coherency, and volume fraction of the needle-like precipitates played the leading role in influencing the alloy’s hardness. A comprehensive mechanism has been proposed for the phase decomposition of the alloy, based on the microstructure and chemical composition variations.

Effects of direct aging treatment on microstructure, mechanical properties and residual stress of selective laser melted AlSi10Mg alloy

• The as-fabricated microstructure benefits short-circuit diffusion of Si. • Direct aging treatment promotes unique precipitation behaviors. • Direct aging removes roughly 40% of the residual stress. • Mechanisms of residual stress removal are explored. • Over-aging treatment produces better mechanical properties. Direct aging treatment is an important post-processing procedure, yet little research has been done on how it balances the mechanical properties and the stress removal for selective laser melted (SLMed) AlSi10Mg alloys. Here, we proposed a typical direct aging treatment on SLMed AlSi10Mg alloys, and studied the effects on their microstructure, properties and residual stress evolution. The results indicate that the as-built microstructure is mainly composed of fine cellular α-Al and reticulated Si phases, and some pre-existing precipitates and dislocations are found in these cells. The direct aging treatment promotes the precipitation of the nano-scaled Si phase and preserves the network-like Si structure. Therefore, the strength of the peak-aged alloy increases while the ductility decreases. As the aging temperature increases from 160 to 200°C, aging hardening behavior was accelerated significantly. Aging at 160 °C for 4-9 h removes 32.0%-43.0% of the residual stress, which is attributed to the decomposition of the supersaturated α-Al matrix, the precipitation of the nano-Si phase and the exposure of low-angle grain boundaries (LAGBs). Considering the overal alloy performance obtained, over-aging at 160°C for 4 h is the optimized heat treatment regime. Under this condition, the yield strength (YS), ultimate tensile strength (UTS) and elongation (EL) of the alloy in the transverse and longitudinal direction are 309.5 MPa, 464.4 MPa and 8.3% and 286.4 MPa, 464.9 MPa and 5.1%, respectively.

Determination of the reasons for the rupture of links in the product “round flat‑link chain” after mechanical tests for fatigue strength at the consumer

The article describes the conducted research of the product “round flat‑link chain”, with the rupture of three links after heat treatment and mechanical tests at the consumer. The purpose of the research was to determine the cause of the destruction of the chain links. Visual inspection of the chain revealed breaks in three of the nine links. The rupture occurred in the area of factory branding. A metallographic study of two samples cut from a chain link with a break and a link without a break was carried out. During the study, a surface layer was found that was distinguishable from the main microstructure. The presence of the detected surface layer is due to surface hardening. The hardened area of the surface of the link with a break is almost two times smaller than in the link without a break. The amount of residual austenite is larger and larger in the link with the gap. As a result of the conducted studies, it was found that the destruction of the chain links occurred due to a violation of the heat treatment regime of the surface layer.

Comparison of melt evolution and flow mechanisms of Inconel 718, Ti6Al4V, 304 stainless steel, and AlSi10Mg manufactured by laser powder bed fusion, structures, and properties after heat treatments

Process parameters and material type are the key influencing factors in laser powder bed fusion (LPBF) manufacturing. In this study, a three-dimensional high-fidelity discrete heat-flow-coupled model was developed to study the surface morphology, melt evolution, and defect formation mechanisms of four types of alloys formed using LPBF under different laser processes at the powder scale to optimize the process parameters. Four alloys were manufactured by LPBF with optimal process parameters. Multiple characterizations were adopted to disclose the effect of heat-treatment on the microstructure and mechanical properties of the as-built parts of four materials. During LPBF forming, the melts developed from continuous and semicylindrical to discontinuous and “medicine spoon”-shaped at low and high linear energy densities (LEDs), respectively. The Ti6Al4V powder bed exhibited a long trailing melt pool and acted deeper (i.e., keyhole mode). The AlSi10Mg powder bed exhibited a smaller melt pool and did not exhibit trailing (i.e., heat-transfer mode). For Inconel 718 alloy and AlSi10Mg alloy, the improvement of mechanical properties is due to the precipitation of nanoparticle phase. The equilibrium of α+β phase results in the ideal strength and plasticity of Ti6Al4V alloy. The gradual disappearance of the cellular substructure reduces the strength of 304 stainless steel, but increases the plasticity. Process parameters correlate simulations with experiments and establish a "process-structure-properties" system. This study provides insights into melt evolution and flow behavior and is a reference for selecting and optimizing materials, laser-process parameters, and heat treatment regimes in practical engineering.

Advanced high-strength steels for automotive engineering

Diagrams of supercooled austenite decomposition are constructed for new steels of the Kh2G2C2MF alloying system. They provide the application of a science-based approach to the development and improvement of technological heat treatment processes with the use of furnaces with oxidising atmosphere. It is shown that the bainite transformation cannot exist separately from the martensite transformation even at slow cooling speeds. Regimes of heat treatment are selected, providing a possibility to receive the necessary structure for formation of a required complex of mechanical properties in a wide range. It is established that the most perspective heat treatment regime scheme from the point of view of time savings is continuous cooling from the heating temperature. It is revealed that the main structural components of steels after various heat treatment regimes are bainite and martensite, whose ratio determines the mechanical characteristics. Bainite is carbide-free, which favourably influences the complex of mechanical characteristics. The excessive ferrite and ferrite-carbide mixture formed in the structure at slow rates of continuous cooling in the upper temperature range do not affect the mechanical properties since their amount is insignificant. It is established that new economically alloyed steels with chromium, manganese, silicon, molybdenum, vanadium, and different carbon content belong to third-generation automotive steels, which gives prospects of using this material for manufacturing various automotive parts to improve the entire structure.

Effect of heat treatment on content of δ-ferrite and properties of martensitic-ferritic steel

The results of a quantitative assessment of the content of δ-ferrite in martensitic-ferritic steel and its effect on properties under various heat treatment regimes are presented. It was found that with a high content of δ-ferrite, mechanical properties (tensile strength, toughness and hardness) significantly decrease after heat treatment (quenching + tempering). With a low content of δ-ferrite, it increases the hardness of steel. The content of δ-ferrite in 14Kh17N2 steel can be regulated by controlling the chromium and nickel content in the steel composition, as well as the quenching temperature.

Physical modeling of CCT diagram of tool steel 1.2343

The article deals with phase transformations and austenitizing behavior of the 1.2343 tool steel. Dilatation analyses of a series of samples were performed at various cooling rates, chosen in the range from 10°C·s−1 to 0.05°C·s−1. Acquired experimental data were used for evaluation of dilatometric curves in order to map the temperature ranges of phase transformations of the austenite to pearlite, bainite or martensite. All experimental samples from dilatometric analyses were then subjected to microstructural analyses and hardness measurements to characterize the microstructure and hardness for every tested heat treatment regime. At the end of the paper, the resulting CCT diagram was compared with the JMatPro software for accuracy evaluation.

Effect of homogenization on the structure, hardness and corrosion resistance of 1570C alloy

Influence of homogenizing annealing on the parameters of grain structure, phase constituents involving nanoscale aluminides of transition metals, hardness and corrosion resistance of the aluminum alloy 1570C (Al-5Mg-0.18Mn-0.2Sc-0.08Zr, mass.%) ingot was studied to optimize its heat treatment regimes according to a two-stage annealing scheme. At the first step, the ingot was annealed at 360°С for 6 hours (conventional route). At the second step, the annealing was performed at various temperatures in the range of 400 – 520°C for 1 hour. It was found, that additional high-temperature annealing resulted in some reduction in the alloy strength. However, it was quite effective to eliminate the chemical heterogeneity of the cast structure and increase the corrosion resistance maintaining grain size, dispersity and coherency of Al3(Sc, Zr) precipitates.

Preparation and characterization of a novel luminescence nano-sillenite (Bi12SiO20) glass ceramic within Bi2O3–ZnO–SiO2 system

Bismuth silicate with sillenite structure (Bi12SiO20) nanophase was prepared via melt–quenching technique in the Bi2O3–ZnO–SiO2 glass system. The effect of replacement ZnO by Bi2O3 was studied. Their thermal behavior showed the change of glass transition temperature (Tg) from 577 °C in the Bi2O3-free glass to 438 °C in ZnO-free glass. In addition, the crystallization temperatures were not only changed from two to one peak, but also decreased from 927 to 476 °C in the same order. According to the heat treatment regimes, willemite, sillenite, tetragonal Bi2O3, cubic Bi2O3 and traces of ZnO were crystallized with different ratios depending on the change in composition and temperature. Sillenite was enhanced with increase heat treatment temperature and/or Bi2O3 additions. Heat treatment at 650 °C/10 h revealed the best regime, where higher degree of crystallization was achieved. The microstructure at 700 ℃/30 min showed nano-scale oriented parallel rod crystals with hexagonal making at their end, whereas clusters of irregular nano-size crystals was appeared at 650 °C/10 h. Transmission spectra of the glasses in UV–Vis–midIR region were increased with Bi2O3 addition reaching 74% in 100B. Photoluminescence properties of both glasses and their corresponding glass–ceramics showed luminescence nature since the blue and green colors were clearly appeared. Calculation of optical bandgap (Eopt) revealed 3.2–2.19 eV with increasing Bi2O3; these values are located in the semiconducting range. The prepared samples can be utilized in electro-optical instruments, also the high transmission in mid-IR nominate it for IR transmitting windows.

Microstructural and mechanical investigations on the heat treatment rejuvenation of a long-term service-exposed GTD-111 Ni-based superalloy

Increasing firing temperature has been known to increase gas turbine machines' power generation and cycle efficiency. The Ni-based superalloys are excellent candidate materials with superior mechanical properties, oxidation, and corrosion resistance for elevated temperature applications. GTD-111 is a Ni-base superalloy that is utilized at high temperatures and stresses as a hot section blade of heavy gas turbines. However, working in such harsh environments is extremely degrading and causes microstructural and mechanical deterioration during long-term operation. In order to regenerate the microstructure and mechanical properties after specific service hours, rejuvenation heat treatments are applied. Nevertheless, a few reports investigated the effect of rejuvenation heat treatments on microstructure and mechanical properties of turbine blade components after long-time exposure, which are made of cast GTD-111 Ni-base superalloys. This study investigated the effect of various rejuvenation heat treatments on the microstructural changes, and high temperature-low stress creep properties of service-exposed GTD-111 turbine blades. The different parameters, such as solution temperature, cooling rate, and aging, are considered. It was found that a proper selection of solution temperature, cooling rate, and aging heat treatment can restore the microstructure and mechanical properties of a service-exposed blade close to an un-exposed condition. Among all heat treatment regimes, full solution at 1190 °C for 2 h (cooling rate 14 °C/min) + aging at 845 °C for 24 h (air cooling) showed the optimum restoration parameters from both microstructural and mechanical aspects.

Recent Advances on Composition-Microstructure-Properties Relationships of Precipitation Hardening Stainless Steel.

Precipitation hardening stainless steels have attracted extensive interest due to their distinguished mechanical properties. However, it is necessary to further uncover the internal quantitative relationship from the traditional standpoint based on the statistical perspective. In this review, we summarize the latest research progress on the relationships among the composition, microstructure, and properties of precipitation hardened stainless steels. First, the influence of general chemical composition and its fluctuation on the microstructure and properties of PHSS are elaborated. Then, the microstructure and properties under a typical heat treatment regime are discussed, including the precipitation of B2-NiAl particles, Cu-rich clusters, Ni3Ti precipitates, and other co-existing precipitates in PHSS and the hierarchical microstructural features are presented. Next, the microstructure and properties after the selective laser melting fabricating process which act as an emerging technology compared to conventional manufacturing techniques are also enlightened. Thereafter, the development of multi-scale simulation and machine learning (ML) in material design is illustrated with typical examples and the great concerns in PHSS research are presented, with a focus on the precipitation techniques, effect of composition, and microstructure. Finally, promising directions for future precipitation hardening stainless steel development combined with multi-scale simulation and ML methods are prospected, offering extensive insight into the innovation of novel precipitation hardening stainless steels.

Structure, crystallographic texture and anisotropy of properties of VZh159 alloy and how they are influenced by regimes of selective laser melting and final heat treatment

This paper examines the effect of scanning strategy (unidirectional scan, island scan and a scan with a 60о turn of the laser beam between layers) during selective laser melting and heat treatment on the crystallographic texture and mechanical properties of VZh159 alloy specimens. Application of different scanning strategies leads to two types of crystallographic texture formed in specimens: the axial component <100> gets reinforced in the unidirectional strategy, while it is the texture component {100}<001> in the other cases. After printing, the specimens were subjected to different regimes of heat treatment. They included quenching from 1,100 oC; quenching from 1,100 oC and ageing at 800 and 700 oC; quenching from 1,100 oC and ageing at 900, 800, 700 and 650 oC. When heat treatment (ageing) tests are conducted at room temperature, it leads to increased yield point and strength as a result of secondary phase precipitation at grain boundary and in grain core, while plasticity drops. During high temperature tests, no strength gain was found after heat treatment. In all heat treatment regimes, the authors observed anisotropy of mechanical properties in the specimens caused by the crystallographic texture that remains after heat treatment. The maximum strength and yield point were detected at 45о load application to growth direction during printing. At the same time, the anisotropy of yield point does not change during high temperature mechanical testing (at 850 oC) and has no dependence on the amount of additional precipitates. It suggests that crystallographic texture plays a defining role for anisotropy of properties.The research was conducted under financial support of Russian Federation presented by the RF Ministry of Science and Higher Education (Agreement No. 075-15-2021-1352).