Pub Date : 2024-08-09DOI: 10.1134/s0031918x24600246
M. K. Ramazanov, A. K. Murtazaev, M. A. Magomedov, M. K. Mazagaeva
Abstract
Based on the replica exchange algorithm of the Monte Carlo method, the influence of an external magnetic field on phase transitions and thermodynamic properties of the two-dimensional antiferromagnetic Potts model with the number of spin states q = 4 on a hexagonal lattice was studied. The studies were conducted in the range of external magnetic field values of 0.0 ≤ h ≤ 10.0. The magnetic field is measured in relative units of exchange interaction between nearest neighbors |J1|. The magnetic structures of the ground state were obtained, and the nature of phase transitions in the considered field range was analyzed. It has been established that in the intervals 0.0 ≤ h ≤ 3.0 and 6.0 ≤ h ≤ 6.5 a first-order phase transition is observed. It is shown that at the external magnetic field values h = 3.5 and 5.5, the system is frustrated, and in the magnetic field intervals 4.0 ≤ h ≤ 5.0 and 7.0 ≤ h ≤ 8.5, the system approaches the frustration regime. It was found that strong magnetic fields (h ≥ 9.0) suppress the phase transition in the system.
摘要 基于蒙特卡洛法的复制交换算法，研究了外磁场对六面体晶格上自旋态数为 q = 4 的二维反铁磁波茨模型的相变和热力学性质的影响。研究在 0.0 ≤ h ≤ 10.0 的外磁场值范围内进行。磁场是以近邻间交换相互作用的相对单位|J1|来测量的。得到了基态的磁结构，并分析了在所考虑的磁场范围内相变的性质。结果表明，在 0.0 ≤ h ≤ 3.0 和 6.0 ≤ h ≤ 6.5 的区间内，可以观察到一阶相变。研究表明，在外部磁场值 h = 3.5 和 5.5 时，系统处于沮散状态，而在磁场区间 4.0 ≤ h ≤ 5.0 和 7.0 ≤ h ≤ 8.5 时，系统接近沮散状态。研究发现，强磁场（h ≥ 9.0）抑制了系统中的相变。
{"title":"Influence of Magnetic Field on Phase Transitions in the Antiferromagnetic Potts Model","authors":"M. K. Ramazanov, A. K. Murtazaev, M. A. Magomedov, M. K. Mazagaeva","doi":"10.1134/s0031918x24600246","DOIUrl":"https://doi.org/10.1134/s0031918x24600246","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Based on the replica exchange algorithm of the Monte Carlo method, the influence of an external magnetic field on phase transitions and thermodynamic properties of the two-dimensional antiferromagnetic Potts model with the number of spin states <i>q</i> = 4 on a hexagonal lattice was studied. The studies were conducted in the range of external magnetic field values of 0.0 ≤ <i>h</i> ≤ 10.0. The magnetic field is measured in relative units of exchange interaction between nearest neighbors |<i>J</i><sub>1</sub>|. The magnetic structures of the ground state were obtained, and the nature of phase transitions in the considered field range was analyzed. It has been established that in the intervals 0.0 ≤ <i>h</i> ≤ 3.0 and 6.0 ≤ <i>h</i> ≤ 6.5 a first-order phase transition is observed. It is shown that at the external magnetic field values <i>h</i> = 3.5 and 5.5, the system is frustrated, and in the magnetic field intervals 4.0 ≤ <i>h</i> ≤ 5.0 and 7.0 ≤ <i>h</i> ≤ 8.5, the system approaches the frustration regime. It was found that strong magnetic fields <i>(h</i> ≥ 9.0) suppress the phase transition in the system.</p>","PeriodicalId":20180,"journal":{"name":"Physics of Metals and Metallography","volume":"2 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141949073","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-09DOI: 10.1134/s0031918x24600453
V. V. Menshenin, A. P. Nosov
Abstract
The linear electro-optic effect is investigated in films of RFeO3 compounds (R = Y, Lu, Yb) possessing hexagonal symmetry. A general equation for the optical indicatrix of the film at arbitrary orientation of an external electric field is derived. The equation of the indicatrix in the principal axes, as well as the principal refractive indices, are determined for the particular case of an external electric field orientation along the [010] axis. Two novel optical axes are identified in the presence of an electric field. It was determined that two isonormal modes propagate in the film when light propagates along the [100] direction. The refractive indices associated with these modes were also found. The phase shift associated with the propagation of these modes and caused by the presence of an electric field is calculated. The shift is linear along the electric field, thereby demonstrating the Pockels effect.
{"title":"Electro-Optic Effect in Hexagonal Compounds RFeO3","authors":"V. V. Menshenin, A. P. Nosov","doi":"10.1134/s0031918x24600453","DOIUrl":"https://doi.org/10.1134/s0031918x24600453","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The linear electro-optic effect is investigated in films of RFeO<sub>3</sub> compounds (R = Y, Lu, Yb) possessing hexagonal symmetry. A general equation for the optical indicatrix of the film at arbitrary orientation of an external electric field is derived. The equation of the indicatrix in the principal axes, as well as the principal refractive indices, are determined for the particular case of an external electric field orientation along the [010] axis. Two novel optical axes are identified in the presence of an electric field. It was determined that two isonormal modes propagate in the film when light propagates along the [100] direction. The refractive indices associated with these modes were also found. The phase shift associated with the propagation of these modes and caused by the presence of an electric field is calculated. The shift is linear along the electric field, thereby demonstrating the Pockels effect.</p>","PeriodicalId":20180,"journal":{"name":"Physics of Metals and Metallography","volume":"73 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141949074","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-09DOI: 10.1134/s0031918x24600350
R. A. Savrai, P. A. Skorynina, Yu. M. Kolobylin
Abstract
The paper studies the structure, chemical and phase composition, microhardness, and surface roughness of heat-resistant chromium–nickel (in wt %: 24.27 Cr and 18.81 Ni) austenitic steel subjected to liquid carburizing at a temperature of 780°С. It is established that the microstructure of the carburized layer predominately consists of carbon-rich austenite (γ-phase), chromium carbide Cr7C3, and cementite Fe3C. It is revealed that carbides precipitate both at boundaries and inside the austenite grains; as we move away from the steel surface, the amount and dispersity of intragranular carbides decreases. It is also established that liquid carburizing leads to an increase in the microhardness of steel surface from 200 to 590 HV0.0025. The total depth of hardening is approximately 200 μm, and the hardened layer is gradient-wise. The surface of the carburized steel is characterized by large surface roughness (Ra = 2.40 μm and Rz = 17.60 μm), compared to the electropolished surface of specimens before carburizing (Ra = 0.17 μm and Rz = 1.80 μm), which is caused by several factors, including, e.g., oxidation of the surface.
{"title":"Structure and Surface Properties of Stable Austenitic Steel Subjected to Liquid Carburizing at Lowered Temperature","authors":"R. A. Savrai, P. A. Skorynina, Yu. M. Kolobylin","doi":"10.1134/s0031918x24600350","DOIUrl":"https://doi.org/10.1134/s0031918x24600350","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The paper studies the structure, chemical and phase composition, microhardness, and surface roughness of heat-resistant chromium–nickel (in wt %: 24.27 Cr and 18.81 Ni) austenitic steel subjected to liquid carburizing at a temperature of 780°С. It is established that the microstructure of the carburized layer predominately consists of carbon-rich austenite (γ-phase), chromium carbide Cr<sub>7</sub>C<sub>3</sub>, and cementite Fe<sub>3</sub>C. It is revealed that carbides precipitate both at boundaries and inside the austenite grains; as we move away from the steel surface, the amount and dispersity of intragranular carbides decreases. It is also established that liquid carburizing leads to an increase in the microhardness of steel surface from 200 to 590 HV0.0025. The total depth of hardening is approximately 200 μm, and the hardened layer is gradient-wise. The surface of the carburized steel is characterized by large surface roughness (<i>Ra</i> = 2.40 μm and <i>Rz</i> = 17.60 μm), compared to the electropolished surface of specimens before carburizing (<i>Ra</i> = 0.17 μm and <i>Rz</i> = 1.80 μm), which is caused by several factors, including, e.g., oxidation of the surface.</p>","PeriodicalId":20180,"journal":{"name":"Physics of Metals and Metallography","volume":"11 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141949079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-09DOI: 10.1134/s0031918x24600647
Yu. V. Khlebnikova, I. L. Yakovleva, L. Yu. Egorova, T. R. Suaridze, N. L. Chernenko, V. V. Ryabov, S. V. Korotovskaya, E. I. Khlusova
Abstract
The structure and mechanical properties of rolled sheets with a thickness of 40 mm made of low-carbon low-alloyed steel after thermomechanical treatment of different modes are investigated. The structural factors that affect obtaining high mechanical properties are established. It is shown that a complex treatment including quenching from the rolling temperature and high-temperature tempering with a subsequent additional cycle of quenching and tempering leads to formation of rolled sheet uniform over the cross section with a fragmented bainite structure with disperse niobium carbides and carbides of cementite type. Such structure provides a yield strength of no less than 630 MPa in combination with high values of the impact energy at negative temperatures and a level of plasticity of δ ≈ 20%.
{"title":"Effect of Thermal-Kinetic Conditions of Austenite Transformation on the Structural-Phase State of Low-Carbon Steel Sheets","authors":"Yu. V. Khlebnikova, I. L. Yakovleva, L. Yu. Egorova, T. R. Suaridze, N. L. Chernenko, V. V. Ryabov, S. V. Korotovskaya, E. I. Khlusova","doi":"10.1134/s0031918x24600647","DOIUrl":"https://doi.org/10.1134/s0031918x24600647","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The structure and mechanical properties of rolled sheets with a thickness of 40 mm made of low-carbon low-alloyed steel after thermomechanical treatment of different modes are investigated. The structural factors that affect obtaining high mechanical properties are established. It is shown that a complex treatment including quenching from the rolling temperature and high-temperature tempering with a subsequent additional cycle of quenching and tempering leads to formation of rolled sheet uniform over the cross section with a fragmented bainite structure with disperse niobium carbides and carbides of cementite type. Such structure provides a yield strength of no less than 630 MPa in combination with high values of the impact energy at negative temperatures and a level of plasticity of δ ≈ 20%.</p>","PeriodicalId":20180,"journal":{"name":"Physics of Metals and Metallography","volume":"3 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141949046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-09DOI: 10.1134/s0031918x24600283
A. V. Svyatkin, A. M. Gnusina, N. N. Gryzunova
Abstract
Changing the morphology of intermetallic inclusions of two-phase alloyed brass is studied during its heating in a hot deformation temperature range. During heating, the redistribution of elements between silicide inclusions and matrix solution is found to occur, which, in a temperature range of 750–830°С, results in the silicide surface exfoliation and loss of coherence.
{"title":"On the Effect of Heating of Two-Phase Alloyed Brasses on Morphological Peculiarities of Intermetallic Inclusions","authors":"A. V. Svyatkin, A. M. Gnusina, N. N. Gryzunova","doi":"10.1134/s0031918x24600283","DOIUrl":"https://doi.org/10.1134/s0031918x24600283","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Changing the morphology of intermetallic inclusions of two-phase alloyed brass is studied during its heating in a hot deformation temperature range. During heating, the redistribution of elements between silicide inclusions and matrix solution is found to occur, which, in a temperature range of 750–830°С, results in the silicide surface exfoliation and loss of coherence.</p>","PeriodicalId":20180,"journal":{"name":"Physics of Metals and Metallography","volume":"32 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141949075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-09DOI: 10.1134/s0031918x24600398
A. N. Petrova, I. G. Brodova, V. V. Astafiev, D. Yu. Rasposienko, A. O. Kuryshev, A. N. Balakhnin, S. V. Uvarov, O. B. Naimark
Abstract
The effect of nanosecond pulse laser processing of the Zr–1% Nb alloy surface of specimens in the annealed state and after their two-stage deformation treatment by abc-pressing and rolling has been investigated. The morphology of the modified surface of specimens is described using optical and scanning microscopy. Furthermore, the microrelief formed as a result of vaporization and melting of a thin layer of material subjected to laser processing is evaluated quantitatively. Durometric measurements were conducted to ascertain the hardness of the near-surface layer and the impact of laser-induced shock waves on its hardness. The electron backscattering diffraction (EBSD) analysis data were employed to describe the structure of the specimens in the near-surface layer. The influence of the initial grain size on the quality of the modified surface, as well as on the depth and hardening of the near-surface layers has been established.
{"title":"Surface Modification of Zr–Nb Alloy by Nanosecond Pulse Laser Processing","authors":"A. N. Petrova, I. G. Brodova, V. V. Astafiev, D. Yu. Rasposienko, A. O. Kuryshev, A. N. Balakhnin, S. V. Uvarov, O. B. Naimark","doi":"10.1134/s0031918x24600398","DOIUrl":"https://doi.org/10.1134/s0031918x24600398","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The effect of nanosecond pulse laser processing of the Zr–1% Nb alloy surface of specimens in the annealed state and after their two-stage deformation treatment by <i>abc</i>-pressing and rolling has been investigated. The morphology of the modified surface of specimens is described using optical and scanning microscopy. Furthermore, the microrelief formed as a result of vaporization and melting of a thin layer of material subjected to laser processing is evaluated quantitatively. Durometric measurements were conducted to ascertain the hardness of the near-surface layer and the impact of laser-induced shock waves on its hardness. The electron backscattering diffraction (EBSD) analysis data were employed to describe the structure of the specimens in the near-surface layer. The influence of the initial grain size on the quality of the modified surface, as well as on the depth and hardening of the near-surface layers has been established.</p>","PeriodicalId":20180,"journal":{"name":"Physics of Metals and Metallography","volume":"58 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141949078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-09DOI: 10.1134/s0031918x2460043x
R. P. Karagergi, A. V. Kozlov, V. Yu. Yarkov, V. I. Pastukhov, S. V. Barsanova, T. A. Churyumova, N. M. Mitrofanova, M. V. Leont’eva-Smirnova
Abstract
Short-term mechanical testing of annular specimens made of a segment of the fuel element cladding irradiated in the BN-600 reactor up to damaging dose above 100 dpa has been performed. The specimens were compressed in the radial direction at different temperatures to plot experimental diagrams and analyze the stress-strain state. After testing, the fracture character and microstructure of the fracture surface were studied. It is shown that fracture of specimens at the microlevel occurs transgranularly, and the segments of fracture are observed along characteristic structural elements of cold deformed austenitic steel, along and transverse to packets of deformation twins. In general, fracture occurs with a strong deformation localization at different types of appeared defects.
{"title":"Microstructure of Fracture Surfaces after Radial Compression of Annular Specimens Made of Cladding Austenitic Steel Exposed to Damaging Dose above 100 dpa","authors":"R. P. Karagergi, A. V. Kozlov, V. Yu. Yarkov, V. I. Pastukhov, S. V. Barsanova, T. A. Churyumova, N. M. Mitrofanova, M. V. Leont’eva-Smirnova","doi":"10.1134/s0031918x2460043x","DOIUrl":"https://doi.org/10.1134/s0031918x2460043x","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Short-term mechanical testing of annular specimens made of a segment of the fuel element cladding irradiated in the BN-600 reactor up to damaging dose above 100 dpa has been performed. The specimens were compressed in the radial direction at different temperatures to plot experimental diagrams and analyze the stress-strain state. After testing, the fracture character and microstructure of the fracture surface were studied. It is shown that fracture of specimens at the microlevel occurs transgranularly, and the segments of fracture are observed along characteristic structural elements of cold deformed austenitic steel, along and transverse to packets of deformation twins. In general, fracture occurs with a strong deformation localization at different types of appeared defects.</p>","PeriodicalId":20180,"journal":{"name":"Physics of Metals and Metallography","volume":"14 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141949083","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-09DOI: 10.1134/s0031918x24600386
A. G. Kesarev
Abstract
For a polycrystalline material with a hexagonal close-packed lattice, a model is proposed that allows estimating the yield strength at a given texture. The plasticity properties of an individual grain are described by the generalized von Mises criterion. The most widespread averaging approaches are considered to determine the yield strength of a polycrystal. An original averaging method for a heterogeneous medium under plastic deformation conditions is proposed that takes into account the presence of undeformed grains whose share is determined by means of the percolation theory. Using each approach, the problem about tension/compression of a homogeneous rod of square cross-section is solved for two limiting cases: no texture and rigid basis texture. The calculation results are juxtaposed with the available literature data. The effect of the texture on the yield strength is considered. A qualitative explanation of generating a texture is given.
{"title":"Calculation of the Yield Strength of Polycrystalline Materials with a Hexagonal Close-Packed Lattice at a Given Texture","authors":"A. G. Kesarev","doi":"10.1134/s0031918x24600386","DOIUrl":"https://doi.org/10.1134/s0031918x24600386","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>For a polycrystalline material with a hexagonal close-packed lattice, a model is proposed that allows estimating the yield strength at a given texture. The plasticity properties of an individual grain are described by the generalized von Mises criterion. The most widespread averaging approaches are considered to determine the yield strength of a polycrystal. An original averaging method for a heterogeneous medium under plastic deformation conditions is proposed that takes into account the presence of undeformed grains whose share is determined by means of the percolation theory. Using each approach, the problem about tension/compression of a homogeneous rod of square cross-section is solved for two limiting cases: no texture and rigid basis texture. The calculation results are juxtaposed with the available literature data. The effect of the texture on the yield strength is considered. A qualitative explanation of generating a texture is given.</p>","PeriodicalId":20180,"journal":{"name":"Physics of Metals and Metallography","volume":"30 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141949080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-09DOI: 10.1134/s0031918x2460060x
A. V. Komelkov, A. V. Nokhrin, A. A. Bobrov, A. N. Sysoev
Abstract
The process of precipitation of Al3Zr particles in cast Al–(0.25–0.4) wt % Zr alloys manufactured by the induction casting method is studied. The effect of zirconium concentration on the structural parameters, hardness, and specific electrical resistance (SER) of cast alloys is investigated. The dependences of hardness and SER on the time of cast alloys annealing at 500°C are plotted. The parameters of the Johnson–Mehl–Avrami–Kolmogorov equation for alloys with different Zr content are determined. The optimal regimes of cast ingot aging are found. Fine wires with ∅0.3 mm are manufactured by the drawing method; their strength, SER, and hardness are studied in the initial state and after heat treatment. The tests of thermal stability of wires are carried out according to the state standard GOST R MEK 62004–2014.
{"title":"Thermal Stability of Microstructure and Properties of Ingots and Fine Wires from Al–Zr Alloys","authors":"A. V. Komelkov, A. V. Nokhrin, A. A. Bobrov, A. N. Sysoev","doi":"10.1134/s0031918x2460060x","DOIUrl":"https://doi.org/10.1134/s0031918x2460060x","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The process of precipitation of Al<sub>3</sub>Zr particles in cast Al–(0.25–0.4) wt % Zr alloys manufactured by the induction casting method is studied. The effect of zirconium concentration on the structural parameters, hardness, and specific electrical resistance (SER) of cast alloys is investigated. The dependences of hardness and SER on the time of cast alloys annealing at 500°C are plotted. The parameters of the Johnson–Mehl–Avrami–Kolmogorov equation for alloys with different Zr content are determined. The optimal regimes of cast ingot aging are found. Fine wires with ∅0.3 mm are manufactured by the drawing method; their strength, SER, and hardness are studied in the initial state and after heat treatment. The tests of thermal stability of wires are carried out according to the state standard GOST R MEK 62004–2014.</p>","PeriodicalId":20180,"journal":{"name":"Physics of Metals and Metallography","volume":"2 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141949084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-09DOI: 10.1134/s0031918x24600167
N. V. Sakharov, V. N. Chuvil’deev
Abstract
The effect of grain boundary retardation by annealing twins in pure copper has been experimentally and theoretically investigated. A model that describes the influence of annealing twins on the migration of grain boundaries in pure metals has been proposed. The retarding force from the twins has been demonstrated to be analogous to the Zener retarding force created by incoherent fine particles. An equation has been derived to calculate the retarding force induced by annealing twins. The force has been demonstrated to be inversely proportional to the size of the twins and directly proportional to their volume fraction. The simulation results have been compared with the experimental results. A satisfactory correlation between the theoretical and experimental results has been achieved.
{"title":"Effect of Annealing Twins on Grain Boundary Migration in High-Purity Copper","authors":"N. V. Sakharov, V. N. Chuvil’deev","doi":"10.1134/s0031918x24600167","DOIUrl":"https://doi.org/10.1134/s0031918x24600167","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The effect of grain boundary retardation by annealing twins in pure copper has been experimentally and theoretically investigated. A model that describes the influence of annealing twins on the migration of grain boundaries in pure metals has been proposed. The retarding force from the twins has been demonstrated to be analogous to the Zener retarding force created by incoherent fine particles. An equation has been derived to calculate the retarding force induced by annealing twins. The force has been demonstrated to be inversely proportional to the size of the twins and directly proportional to their volume fraction. The simulation results have been compared with the experimental results. A satisfactory correlation between the theoretical and experimental results has been achieved.</p>","PeriodicalId":20180,"journal":{"name":"Physics of Metals and Metallography","volume":"52 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141949077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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