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学者姓名：王晨
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Abstract ：
The microstructure of commercially pure titanium subjected to uniaxial compression was meticulously analyzed using electron backscattered diffraction (EBSD) to investigate the variant activation behavior of {11−22} twins and {10−12} twins. The results reveal that the type and number of activated twin variants are strongly dependent on the loading direction—whether applied along the normal direction (ND) or the rolling direction (RD). Notably, loading along ND can activate up to five twin variants, and most are activated with low Schmid Factor (SF) rank but high SF value. The variation in the number of activated twin variants within a grain is influenced by factors such as grain size, the activation stress of twinning versus slip, and the orientation of the loading direction relative to the c-axis. SF value for two twinning systems ({11−22} twins and {10−12} twins) were systematically calculated in pure titanium as a function of the angle between the c-axis and the loading direction, which indicates that compression along a direction closely aligned with the c-axis has the potential to activate up to six variants of {11−22} twins simultaneously. In contrast, compression perpendicular to the c-axis tends to activate fewer {10−12} twin variants, with the twinning activation being highly sensitive to the degree of c-axis rotation. © 2025 Elsevier B.V.
Keyword ：
EBSD EBSD Multiple-variants Multiple-variants Pure titanium Pure titanium Strain compatibility Strain compatibility Twinning Twinning
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| GB/T 7714 | Chen, J. , An, Q. , Deng, L. et al. Activation mechanism of multiple twin variants during uniaxial compression in pure titanium [J]. | Journal of Alloys and Compounds , 2025 , 1024 . |
| MLA | Chen, J. et al. "Activation mechanism of multiple twin variants during uniaxial compression in pure titanium" . | Journal of Alloys and Compounds 1024 (2025) . |
| APA | Chen, J. , An, Q. , Deng, L. , Ye, P. , Wang, C. , Xiao, L. et al. Activation mechanism of multiple twin variants during uniaxial compression in pure titanium . | Journal of Alloys and Compounds , 2025 , 1024 . |
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This study investigates the effects of different annealing parameters on the microstructure, texture, and mechanical properties of hot-rolled pure yttrium plates using electron backscatter diffraction for the first time. With the increase of annealing temperature and time, the volume fraction of low-angle grain boundaries of hot-rolled pure yttrium plate decreases. While the intensity of the texture firstly decreases and then increases. During annealing at 600 degrees C, the {0002} pole density shifted from deviating from the normal direction (ND) by similar to 30 degrees to being in line with the ND as the annealing time increased, forming a typical basal texture. This can be attributed to its unique recrystallization mechanism. The strength and hardness of the as-annealed samples were significantly lower than that under the hot-rolled state, while the elongation increased when compared with the hot-rolled sample. The considerable mechanical properties of pure yttrium plate are obtained by hot rolling and following annealing at 600 degrees C for 1 h.
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| GB/T 7714 | Ruan, Wei , Luo, Linguang , Li, Jiajie et al. Effect of annealing parameters on microstructure, texture, and mechanical properties of hot-rolled pure yttrium plate [J]. | JOURNAL OF MATERIALS SCIENCE , 2025 , 60 (14) : 6387-6401 . |
| MLA | Ruan, Wei et al. "Effect of annealing parameters on microstructure, texture, and mechanical properties of hot-rolled pure yttrium plate" . | JOURNAL OF MATERIALS SCIENCE 60 . 14 (2025) : 6387-6401 . |
| APA | Ruan, Wei , Luo, Linguang , Li, Jiajie , Deng, Liping , Wang, Chen , Chen, Junfeng et al. Effect of annealing parameters on microstructure, texture, and mechanical properties of hot-rolled pure yttrium plate . | JOURNAL OF MATERIALS SCIENCE , 2025 , 60 (14) , 6387-6401 . |
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In this work, the Cu-Ni-Si alloy sheets with a thickness of 1.5 mm were prepared by constrained groove pressing (CGP) and aging treatments. The results show that the combination of CGP and aging treatments can simultaneously improve the mechanical properties and electrical conductivity of alloy. The sample subjected to 10 passes of CGP treatment and aged at 460 degrees C for 1 h exhibits optimal comprehensive properties, with a hardness of 234.8 HV, an ultimate tensile strength of 773.5 MPa, an electrical conductivity of 38.1 %IACS, and a favorable breaking elongation of 15.7 %. Compared to the peak-aged sample without CGP treatment, the hardness, ultimate tensile strength and electrical conductivity increase by 12.4 %, 15.1 % and 5.5 %, respectively. The CGP treatment can refine the grain size of alloy and increase the dislocation density, thereby promoting the precipitation of solute atoms during the aging process. The aged sample subjected to CGP treatment has a higher quantity of S-Ni2Si precipitates, and the formation of Ni3Si2 precipitates is inhibited. After aging treatment, the proportion of E3 grain boundary increases in the sample subjected to CGP treatment. Compared to random grain boundaries, the adjacent grains on both sides of E3 grain boundaries have a smaller Schmid factor mismatch, which helps to improve intergranular deformation compatibility. Moreover, the scattering effect of E3 grain boundaries on electrons is smaller. Therefore, the higher proportion of E3 grain boundary can improve the ductility and electrical conductivity of Cu-Ni-Si alloy.
Keyword ：
Constrained groove pressing Constrained groove pressing Cu-Ni-Si alloy Cu-Ni-Si alloy E3 grain boundary E3 grain boundary Electrical conductivity Electrical conductivity Mechanical properties Mechanical properties
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| GB/T 7714 | Yang, Haoren , Fan, Yachang , Zhou, Jianhui et al. Simultaneous enhancement of mechanical properties and electrical conductivity in Cu-Ni-Si alloy by constrained groove pressing and aging treatments [J]. | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING , 2025 , 938 . |
| MLA | Yang, Haoren et al. "Simultaneous enhancement of mechanical properties and electrical conductivity in Cu-Ni-Si alloy by constrained groove pressing and aging treatments" . | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 938 (2025) . |
| APA | Yang, Haoren , Fan, Yachang , Zhou, Jianhui , Shi, Bingbing , Chen, Junfeng , Lin, Na et al. Simultaneous enhancement of mechanical properties and electrical conductivity in Cu-Ni-Si alloy by constrained groove pressing and aging treatments . | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING , 2025 , 938 . |
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In this paper, the effects of Hf addition on the mechanical properties, electrical conductivity and microstructure of Cu-Sn-P alloy were investigated. The results show that the Hf addition can enhance the mechanical properties and electrical conductivity of Cu-Sn-P alloy. The alloy with 0.05 wt% Hf exhibits the best comprehensive performance with yield strength of 625 MPa, tensile strength of 661 MPa and electrical conductivity of 16.8 %IACS. Compared with the Cu-Sn-P alloy without Hf addition, the yield strength and tensile strength are increased by 8.4% and 7.8%, and the electrical conductivity is increased by 24.4%. The increase in the strength of Hf-added alloy can be attributed to the synergistic effect of multiple strengthening mechanisms, including fine grain strengthening, twin strengthening, dislocation strengthening, precipitation strengthening and Σ3n (n = 1, 2, 3) grain boundary strengthening. Moreover, the Hf-P precipitates can be observed in the Hf-added alloy. According to the amount of Hf addition, these precipitates can manifest as the fine HfP2 phase and the coarse HfP phase. The formation of Hf-P precipitates contributes to the precipitation strengthening and the purification of Cu matrix, thus contributing to the improvement of strength and conductivity. © 2024 The Authors
Keyword ：
Copper alloys Copper alloys Electric conductivity Electric conductivity Hafnium alloys Hafnium alloys Lead alloys Lead alloys Tensile strength Tensile strength Tin alloys Tin alloys Yield stress Yield stress
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| GB/T 7714 | Wei, Biao , Yang, Haoren , Wang, Chen et al. Effects of Hf addition on the microstructure and properties of Cu-Sn-P alloy [J]. | Journal of Materials Research and Technology , 2024 , 33 : 2981-2988 . |
| MLA | Wei, Biao et al. "Effects of Hf addition on the microstructure and properties of Cu-Sn-P alloy" . | Journal of Materials Research and Technology 33 (2024) : 2981-2988 . |
| APA | Wei, Biao , Yang, Haoren , Wang, Chen , Zhou, Jianhui , Xiao, Lei , Ma, Tianyu et al. Effects of Hf addition on the microstructure and properties of Cu-Sn-P alloy . | Journal of Materials Research and Technology , 2024 , 33 , 2981-2988 . |
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Despite the high theoretical energy product and low material cost of Fe-rich 2:17-type Sm-Co-Fe-Cu-Zr magnets,it is still a big challenge to simultaneously achieve high energy product and high coerciv-ity due to damaged cellular nanostructure,i.e.insufficient cell boundary precipitates.In this work,both high energy product(～30.29 MGOe)and high coercivity(～26.24 kOe)have been achieved in Fe-rich Sm24.8CobalFe20.5Cu5.2Zrx(x wt％)magnets through optimizing Zr content.It reveals that raising Zr con-tent from 1.5 wt％to 2.5 wt％can effectively refine the cellular nanostructure,which corresponds to an increased volume fraction of cell boundary precipitates.However,excess Zr content(e.g.above 2.5 wt％)leads to the formation of micron-sized Zr-rich Zr6Co23 soft magnetic particles,weakening the hard mag-netic performance.In particular,the high Zr-content(3.5 wt％)magnet exhibits strongly inhomogeneous chemistry as well as cellular nanostructure in the vicinity of micron-sized Zr6Co23 particles(i.e.heteroge-neous distribution of cell boundary precipitates),deteriorating both squareness factor and coercivity.As a result,the optimum magnetic property combination is achieved at an intermediate Zr concentration by balancing the contradictive effects between cell refinement and soft magnetic impurities.
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| GB/T 7714 | Jian Li , Minxia Fang , Yao Liu et al. Enhanced magnetic performance of Fe-rich Sm2Co17-type magnets by optimizing Zr content [J]. | 材料科学技术（英文版） , 2024 , 193 (26) : 178-186 . |
| MLA | Jian Li et al. "Enhanced magnetic performance of Fe-rich Sm2Co17-type magnets by optimizing Zr content" . | 材料科学技术（英文版） 193 . 26 (2024) : 178-186 . |
| APA | Jian Li , Minxia Fang , Yao Liu , Xin Song , Wentao Jia , Junming Gou et al. Enhanced magnetic performance of Fe-rich Sm2Co17-type magnets by optimizing Zr content . | 材料科学技术（英文版） , 2024 , 193 (26) , 178-186 . |
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Abstract ：
In this paper, the effects of Hf addition on the mechanical properties, electrical conductivity and microstructure of Cu-Sn-P alloy were investigated. The results show that the Hf addition can enhance the mechanical properties and electrical conductivity of Cu-Sn-P alloy. The alloy with 0.05 wt% Hf exhibits the best comprehensive performance with yield strength of 625 MPa, tensile strength of 661 MPa and electrical conductivity of 16.8 %IACS. Compared with the Cu-Sn-P alloy without Hf addition, the yield strength and tensile strength are increased by 8.4% and 7.8%, and the electrical conductivity is increased by 24.4%. The increase in the strength of Hf-added alloy can be attributed to the synergistic effect of multiple strengthening mechanisms, including fine grain strengthening, twin strengthening, dislocation strengthening, precipitation strengthening and Sigma 3n (n = 1, 2, 3) grain boundary strengthening. Moreover, the Hf-P precipitates can be observed in the Hf-added alloy. According to the amount of Hf addition, these precipitates can manifest as the fine HfP2 phase and the coarse HfP phase. The formation of Hf-P precipitates contributes to the precipitation strengthening and the purification of Cu matrix, thus contributing to the improvement of strength and conductivity.
Keyword ：
Cu-Sn-P Cu-Sn-P Electrical conductivity Electrical conductivity Hf element Hf element Mechanical properties Mechanical properties Microstructure Microstructure
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| GB/T 7714 | Wei, Biao , Yang, Haoren , Wang, Chen et al. Effects of Hf addition on the microstructure and properties of Cu-Sn-P alloy [J]. | JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T , 2024 , 33 : 2981-2988 . |
| MLA | Wei, Biao et al. "Effects of Hf addition on the microstructure and properties of Cu-Sn-P alloy" . | JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 33 (2024) : 2981-2988 . |
| APA | Wei, Biao , Yang, Haoren , Wang, Chen , Zhou, Jianhui , Xiao, Lei , Ma, Tianyu et al. Effects of Hf addition on the microstructure and properties of Cu-Sn-P alloy . | JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T , 2024 , 33 , 2981-2988 . |
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To achieve high thermal efficiency, today's nuclear reactor structures are exposed to higher temperatures and pressures, which requires the use of high-strength steels with specific properties, such as ODS steels. There is a need to clarify the evolution of the microstructure and properties of steels at elevated temperatures. This study systematically investigates the evolution of microstructure, texture, and mechanical property variations of 12CrODS steels after hot-rolling and subsequent annealing at 1000 degrees C and 1200 degrees C. The investigation utilizes optical microscopy, electron backscatter diffraction technique, and mechanical property measurements. The microstructure of hot-rolled samples shows a layered alternating distribution, which is distinguished by a notable presence of the alpha-fiber texture. Following annealing at 1000 degrees C, the martensite grains are smaller with a reduced hardness, while maintaining a strong alpha-fiber texture. After annealing at 1200 degrees C, there is a rapid increase in the growth of martensite grains, a significant rise in hardness, a reduction in the alpha-fiber texture characteristics, and an improvement in the gamma-fiber texture characteristics. Moreover, the maximum intensity of the alpha-fiber texture diminishes as the annealing temperature increases. The mechanical properties of the samples deteriorated after annealing at 1200 degrees C, which can be attributed to the coarse martensite grains and the texture components containing the {001} cleavage plane dominating the occurrence of brittle cleavage fracture. The 0.1Y sample after annealing at 1000 degrees C exhibits an excellent combination of strength (1458 MPa) and ductility (20.3%), which is owing to the unique heterogeneous grain structure and the evolution of favorable texture.
Keyword ：
Annealing Annealing Mechanical properties Mechanical properties Microstructure characteristics Microstructure characteristics ODS steel ODS steel Texture Texture
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| GB/T 7714 | Li, Jiajie , Chen, Jingxian , You, Zhangjing et al. Effect of annealing temperature on the evolution of microstructure, texture, and mechanical properties of hot-rolled 12Cr-ODS steel [J]. | JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T , 2024 , 30 : 4800-4812 . |
| MLA | Li, Jiajie et al. "Effect of annealing temperature on the evolution of microstructure, texture, and mechanical properties of hot-rolled 12Cr-ODS steel" . | JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 30 (2024) : 4800-4812 . |
| APA | Li, Jiajie , Chen, Jingxian , You, Zhangjing , Deng, Liping , Wang, Chen , Chen, Junfeng et al. Effect of annealing temperature on the evolution of microstructure, texture, and mechanical properties of hot-rolled 12Cr-ODS steel . | JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T , 2024 , 30 , 4800-4812 . |
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Despite the high theoretical energy product and low material cost of Fe -rich 2:17 -type Sm-Co-Fe-CuZr magnets, it is still a big challenge to simultaneously achieve high energy product and high coercivity due to damaged cellular nanostructure, i.e. insufficient cell boundary precipitates. In this work, both high energy product ( -30.29 MGOe) and high coercivity ( -26.24 kOe) have been achieved in Fe -rich Sm 24.8 Co bal Fe 20.5 Cu 5.2 Zr x ( x wt%) magnets through optimizing Zr content. It reveals that raising Zr content from 1.5 wt% to 2.5 wt% can effectively refine the cellular nanostructure, which corresponds to an increased volume fraction of cell boundary precipitates. However, excess Zr content (e.g. above 2.5 wt%) leads to the formation of micron -sized Zr-rich Zr 6 Co 23 soft magnetic particles, weakening the hard magnetic performance. In particular, the high Zr-content (3.5 wt%) magnet exhibits strongly inhomogeneous chemistry as well as cellular nanostructure in the vicinity of micron -sized Zr 6 Co 23 particles (i.e. heterogeneous distribution of cell boundary precipitates), deteriorating both squareness factor and coercivity. As a result, the optimum magnetic property combination is achieved at an intermediate Zr concentration by balancing the contradictive effects between cell refinement and soft magnetic impurities. (c) 2024 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
Keyword ：
Magnetic properties Magnetic properties Microstructure Microstructure Permanent magnets Permanent magnets
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| GB/T 7714 | Li, Jian , Fang, Minxia , Liu, Yao et al. Enhanced magnetic performance of Fe-rich Sm 2 Co 17-type magnets by optimizing Zr content [J]. | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY , 2024 , 193 : 178-186 . |
| MLA | Li, Jian et al. "Enhanced magnetic performance of Fe-rich Sm 2 Co 17-type magnets by optimizing Zr content" . | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 193 (2024) : 178-186 . |
| APA | Li, Jian , Fang, Minxia , Liu, Yao , Song, Xin , Jia, Wentao , Gou, Junming et al. Enhanced magnetic performance of Fe-rich Sm 2 Co 17-type magnets by optimizing Zr content . | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY , 2024 , 193 , 178-186 . |
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The tension-compression yield asymmetry caused by the strengthening of Mg-Zn-Gd-Zr alloy due to extrusion deformation is an important issue that must be addressed in its application. In this study, the effects of loading direction on the tensile and compressive mechanical behaviors of Mg-5Zn-2Gd-0.2Zr alloy were systematically investigated. As the loading angle (the angle between the loading direction and the extrusion direction) increases from 0 degrees to 30 degrees, 45 degrees, 60 degrees and 90 degrees, the tensile yield strength decreases more significantly than the compressive yield strength. Consequently, the tension-compression yield asymmetry is gradually improved. Additionally, the ultimate compressive strength decreases more markedly than the ultimate tensile strength with the increment of the loading angle. In tensile tests conducted at 0 degrees, 30 degrees and 45 degrees, two distinct stages of decreasing strain hardening rates are typically observed. For the 60 degrees and 90 degrees tensile tests, one unusual ascending stage of strain hardening rate is observed. For all compressive tests, three stages of strain hardening are consistently noted; however, the increment in strain hardening rate caused by {10-12} extension twinning decreases with the increasing loading angle. A model combining loading angle and Schmid factor distribution was established. The calculated results indicate that the dominant deformation modes during the yielding process also vary significantly with the loading conditions. This clarification highlights the differences in yield strength variations between tension and compression. Finally, an analysis of the plane trace and crack propagation direction near the fracture surface reveals the fracture mechanisms associated with tensile and compressive tests at different loading directions. This study promotes understanding of the mechanical behaviors of Mg-5Zn-2Gd-0.2Zr alloy under different loading directions, and helps to thoroughly elucidate the anisotropic effects of texture on the mechanical properties of magnesium alloys.
Keyword ：
fracture mechanism fracture mechanism heterogeneous grains heterogeneous grains magnesium alloy magnesium alloy strain hardening strain hardening tensile and compressive strength tensile and compressive strength
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| GB/T 7714 | Chen, Jieming , Xiao, Lei , Wang, Xuefang et al. Effect of Loading Direction on Tensile-Compressive Mechanical Behaviors of Mg-5Zn-2Gd-0.2Zr Alloy with Heterogeneous Grains [J]. | CRYSTALS , 2024 , 14 (10) . |
| MLA | Chen, Jieming et al. "Effect of Loading Direction on Tensile-Compressive Mechanical Behaviors of Mg-5Zn-2Gd-0.2Zr Alloy with Heterogeneous Grains" . | CRYSTALS 14 . 10 (2024) . |
| APA | Chen, Jieming , Xiao, Lei , Wang, Xuefang , Li, Zhuo , Wang, Chen , Wang, Bingshu et al. Effect of Loading Direction on Tensile-Compressive Mechanical Behaviors of Mg-5Zn-2Gd-0.2Zr Alloy with Heterogeneous Grains . | CRYSTALS , 2024 , 14 (10) . |
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In this study, we investigated the annealing process of a cold-rolled dual-phase Mg-10Li-3Al-2.8Zn alloy and used the crystal defect strengthening model to explain the strengthening mechanism of the annealed Mg-Li alloy. To maximize the strength of the alloy, it is annealed at 553 K for 1 h and then water quenched. The maximum yield strength is 321 MPa and the ultimate tensile strength is 346 MPa. Compared with the cold -rolled alloy, the yield strength is increased by 145 MPa and the ultimate tensile strength is increased by 139 MPa. The high strength of annealed alloy is the result of solution strengthening, fine grain strength-ening, second phase strengthening and dislocation strengthening, in which solution strengthening con-tributes the most. The size, content and distribution of the second phase AlLi and MgLi2Al have significant effects on the strength of the alloy. Higher annealing temperature and rapid cooling are all conducive to the dissolution of AlLi in the matrix, lower temperature and rapid cooling are conducive to the solid solution of MgLi2Al, and higher on the contrary, MgLi2Al will be precipitated quickly at a high temperature. Hard AlLi and MgLi2Al both cause the strengthening of the second phase, but their strengthening effect are far less than that of the second phase solid solution in & beta;-Li. & COPY; 2023 Elsevier B.V. All rights reserved.
Keyword ：
Annealing process Annealing process Mechanical property Mechanical property Mg -Li alloy Mg -Li alloy Microstructure Microstructure Strengthening mechanism Strengthening mechanism
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| GB/T 7714 | Wang, Bingshu , Zhang, Yonggan , Deng, Liping et al. An investigation on annealing process and strengthening mechanism of cold rolled Mg-10Li-3Al-2.8Zn alloy [J]. | JOURNAL OF ALLOYS AND COMPOUNDS , 2023 , 961 . |
| MLA | Wang, Bingshu et al. "An investigation on annealing process and strengthening mechanism of cold rolled Mg-10Li-3Al-2.8Zn alloy" . | JOURNAL OF ALLOYS AND COMPOUNDS 961 (2023) . |
| APA | Wang, Bingshu , Zhang, Yonggan , Deng, Liping , Wang, Chen , Chen, Junfeng , Zhang, Yongjian . An investigation on annealing process and strengthening mechanism of cold rolled Mg-10Li-3Al-2.8Zn alloy . | JOURNAL OF ALLOYS AND COMPOUNDS , 2023 , 961 . |
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