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学者姓名：邓丽萍
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Abstract ：
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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This study investigates the influence of torsional deformation with different equivalent strains on the microstructural evolution and mechanical properties in pure copper at room temperature. The grain size exhibits a gradient distribution pattern with decreasing shear strains. Texture analysis reveals the development of a typical torsion texture during deformation. And the texture component is significantly influenced by the strain level. In samples subjected to low strain at the center position, the dominant texture components are mainly A and A* components. As strain increases in the 1/4 layer sample region, there is a gradual decrease in strength for A* component, while A component remains dominant; additionally, B and C textures exhibit increased strength. At positions subjected to maximum strain near the surface area, B texture replaces A as the strongest texture component. Results also indicate that torsional deformation enhances hardness, strength, and plasticity due to dislocation strengthening, fine grain strengthening and synergistic effects during deformation. Furthermore, the formation of torsional texture during this process may contribute to improved plasticity. © 2023
Keyword ：
Copper Copper Plasticity Plasticity Strain Strain Textures Textures Torsional stress Torsional stress
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| GB/T 7714 | Zhang, Mingxue , Wang, Bingshu , Deng, Liping et al. Effect of torsional deformation on microstructure and mechanical properties of pure copper [J]. | Materials Characterization , 2024 , 214 . |
| MLA | Zhang, Mingxue et al. "Effect of torsional deformation on microstructure and mechanical properties of pure copper" . | Materials Characterization 214 (2024) . |
| APA | Zhang, Mingxue , Wang, Bingshu , Deng, Liping , Wu, Hanqun . Effect of torsional deformation on microstructure and mechanical properties of pure copper . | Materials Characterization , 2024 , 214 . |
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Abstract ：
采用电泳沉积法在铜箔上沉积碳纳米管，层层堆叠后在不同烧结温度（550,650,750,850,950℃）下热压烧结制备碳纳米管增强铜基（CNTs/Cu）复合材料，研究了烧结温度对复合材料显微组织和力学性能的影响。结果表明：随着烧结温度升高，复合材料中孔隙的数量减少，尺寸减小，碳纳米管分布均匀性增大，铜晶粒尺寸增大，退火孪晶晶粒尺寸增大但数量减少；随着烧结温度升高，复合材料的抗拉强度和显微硬度均呈先减小后增大的趋势，断后伸长率变化呈非单调性变化；当烧结温度为650℃时，复合材料的抗拉强度和显微硬度适中，断后伸长率最大，综合力学性能最好。
Keyword ：
CNTs/Cu复合材料 CNTs/Cu复合材料 力学性能 力学性能 显微组织 显微组织 烧结温度 烧结温度
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| GB/T 7714 | 杜航 , 杨柳 , 江永涛 et al. 烧结温度对CNTs/Cu复合材料组织和力学性能的影响 [J]. | 机械工程材料 , 2024 , 48 (06) : 62-66 . |
| MLA | 杜航 et al. "烧结温度对CNTs/Cu复合材料组织和力学性能的影响" . | 机械工程材料 48 . 06 (2024) : 62-66 . |
| APA | 杜航 , 杨柳 , 江永涛 , 陈枳匀 , 邓丽萍 . 烧结温度对CNTs/Cu复合材料组织和力学性能的影响 . | 机械工程材料 , 2024 , 48 (06) , 62-66 . |
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An eight-sided prism sample, obtained from a hot-rolled AZ31 magnesium alloy sheet, was compressed at room temperature along the transverse direction to investigate the influence of local strain on twinning behavior using electron backscatter diffraction (EBSD) measurements, hardness distribution, and metallographic observations. The octagonal surface of the sample was divided into distinct regions based on hardness distribution and metallographic observations. Combined analysis of the Schmid factor (SF) and the strain compatibility factor (m') was employed to study twin variant selection. Basal on SF ratio distribution, the Schmid factor criterion, can predict over 75% of observed twin variants in regions A and D (normal stress samples). In contrast, 64% of twin variant selection behavior in region C (shear stress sample) can be effectively explained using a pure shear model. Twin variants with high strain compatibility factors may prefer activation to reduce stress concentration. The strain compatibility factor is more appropriate than the Schmid factor for analyzing the effect of local strain on the selection behavior of twin variants.
Keyword ：
AZ31 magnesium alloy AZ31 magnesium alloy local strain state local strain state Schmid factor Schmid factor strain compatibility factor strain compatibility factor twin variants selection twin variants selection
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| GB/T 7714 | Lu, Boqin , Wang, Wei , Yao, Jinyi et al. A Study of {10-12} Twinning Activity Associated with Stress State in Mg-3Al-1Zn Alloy during Compression [J]. | METALS , 2024 , 14 (5) . |
| MLA | Lu, Boqin et al. "A Study of {10-12} Twinning Activity Associated with Stress State in Mg-3Al-1Zn Alloy during Compression" . | METALS 14 . 5 (2024) . |
| APA | Lu, Boqin , Wang, Wei , Yao, Jinyi , Deng, Liping , Xiao, Lei , Wang, Bingshu . A Study of {10-12} Twinning Activity Associated with Stress State in Mg-3Al-1Zn Alloy during Compression . | METALS , 2024 , 14 (5) . |
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作为常用的金属材料,铜因强度较低而应用范围受限,石墨烯具有优异的综合性能,作为极具潜力的增强体而受到广泛关注.石墨烯增强铜基复合材料兼具了铜和石墨烯的优良性能而成为了重要的研究对象.介绍了石墨烯增强铜基复合材料的制备工艺与综合性能,重点讨论了各种制备工艺的特点、强化机制、构型设计,总结了针对复合界面结合弱与石墨烯分散困难这2类主要技术难点的解决途径,最后对石墨烯增强铜基复合材料的制备工艺进行了展望.
Keyword ：
制备工艺 制备工艺 强化机制 强化机制 构型设计 构型设计 石墨烯增强铜基复合材料 石墨烯增强铜基复合材料
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| GB/T 7714 | 潘信诚 , 林政淇 , 杨柳 et al. 石墨烯增强铜基复合材料制备工艺及性能的研究进展 [J]. | 机械工程材料 , 2023 , 47 (1) : 1-10 . |
| MLA | 潘信诚 et al. "石墨烯增强铜基复合材料制备工艺及性能的研究进展" . | 机械工程材料 47 . 1 (2023) : 1-10 . |
| APA | 潘信诚 , 林政淇 , 杨柳 , 邓丽萍 . 石墨烯增强铜基复合材料制备工艺及性能的研究进展 . | 机械工程材料 , 2023 , 47 (1) , 1-10 . |
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本工作系统研究多晶纯锡(99.99%)在不同轧制工艺下的显微组织演变和力学行为，阐明纯锡在不同轧制状态下晶粒细化规律，以期为调控与优化纯锡的强韧化奠定理论基础。研究结果表明，不同轧制工艺对纯锡的微观组织和力学性能影响明显，其中轧制速度是影响纯锡的晶粒细化和力学性能提升的最主要因素，温度、速度和路径通过调控变形过程中的孪晶激发以及孪晶诱导再结晶的进程而实现不同工艺下的晶粒细化。轧制过程晶粒细化机制为：变形初期诱发60°<100>形变孪晶，在后续变形过程中孪晶逐渐演变为再结晶条带状组织，分割细化晶粒，且孪晶和再结晶组织的随机取向弱化原始粗晶产生的集中织构。轧制变形能明显提高纯锡的强度，且单向轧制工艺下的纯锡样品的TD方向的屈服强度和抗拉强度明显高于RD方向。
Keyword ：
各向异性 各向异性 孪生 孪生 晶粒细化 晶粒细化 纯锡 纯锡 轧制 轧制
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| GB/T 7714 | 程桑 , 张勇敢 , 汪炳叔 et al. 不同轧制工艺对纯锡微观组织与性能的影响 [J]. | 稀有金属材料与工程 , 2023 , 52 (01) : 206-214 . |
| MLA | 程桑 et al. "不同轧制工艺对纯锡微观组织与性能的影响" . | 稀有金属材料与工程 52 . 01 (2023) : 206-214 . |
| APA | 程桑 , 张勇敢 , 汪炳叔 , 邓丽萍 , 周保雪 , 李强 . 不同轧制工艺对纯锡微观组织与性能的影响 . | 稀有金属材料与工程 , 2023 , 52 (01) , 206-214 . |
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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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In this work, the evolution of microstructure and mechanical properties and the grain refinement law of polycrystalline pure tin (99.99%) under different rolling processes were studied, which was expected to lay a theoretical foundation for adjusting and optimizing the strengthening and toughening properties of pure tin. The results show that different rolling processes have obvious effects on the microstructure and properties of pure tin. The process of twin excitation and twin induced recrystallization in the deformation process are realized by regulating the factors of temperature, speed and path in the rolling process, in which the rolling speed is the most important factor. The grain refinement mechanism of rolling process is as follows: 60°<100> deformation twins are induced at the initial stage of deformation, and the twins gradually evolve into recrystallized banded structure and divide and refine grains in the subsequent deformation process. Recrystallized grains and twins usually randomize the texture and therefore weaken the concentrated texture produced by the original coarse grain. Rolling deformation can significantly increase the strength of pure tin. The yield strength and tensile strength in TD direction are significantly higher than that in RD direction under unidirectional rolling. © 2023 Rare Metals Materials and Engineering Press. All rights reserved.
Keyword ：
anisotropy anisotropy grain refinement grain refinement pure tin pure tin rolling rolling twinning twinning
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| GB/T 7714 | Cheng, S. , Zhang, Y. , Wang, B. et al. Effects of Different Rolling Processes on Microstructure and Properties of Pure Tin [不同轧制工艺对纯锡微观组织与性能的影响] [J]. | Rare Metal Materials and Engineering , 2023 , 52 (1) : 206-214 . |
| MLA | Cheng, S. et al. "Effects of Different Rolling Processes on Microstructure and Properties of Pure Tin [不同轧制工艺对纯锡微观组织与性能的影响]" . | Rare Metal Materials and Engineering 52 . 1 (2023) : 206-214 . |
| APA | Cheng, S. , Zhang, Y. , Wang, B. , Deng, L. , Zhou, B. , Li, Q. . Effects of Different Rolling Processes on Microstructure and Properties of Pure Tin [不同轧制工艺对纯锡微观组织与性能的影响] . | Rare Metal Materials and Engineering , 2023 , 52 (1) , 206-214 . |
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"金属学及热处理"是材料成型与控制工程专业人才培养的核心课程,在教学实践中,通过精选案例,把科学精神、工程伦理、实践能力、自主学习的思政元素融合在课程教学中,运用导学式、沉浸式、体验式和平台式"四式"教学方法,实现专业课程的知识传授、能力培养与价值引领相结合的人才培养目标,更好地落实立德树人的根本任务.
Keyword ：
"四式"教学法 "四式"教学法 课程思政 课程思政 金属学及热处理 金属学及热处理
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| GB/T 7714 | 卢月美 , 邓将华 , 邓丽萍 . 课程思政融入"金属学及热处理"教学的实践探索 [J]. | 机电技术 , 2023 , (2) : 111-113 . |
| MLA | 卢月美 et al. "课程思政融入"金属学及热处理"教学的实践探索" . | 机电技术 2 (2023) : 111-113 . |
| APA | 卢月美 , 邓将华 , 邓丽萍 . 课程思政融入"金属学及热处理"教学的实践探索 . | 机电技术 , 2023 , (2) , 111-113 . |
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Abstract ：
In this work, the evolution of microstructure and mechanical properties and the grain refinement law of polycrystalline pure tin (99.99%) under different rolling processes were studied, which was expected to lay a theoretical foundation for adjusting and optimizing the strengthening and toughening properties of pure tin. The results show that different rolling processes have obvious effects on the microstructure and properties of pure tin. The process of twin excitation and twin induced recrystallization in the deformation process are realized by regulating the factors of temperature, speed and path in the rolling process, in which the rolling speed is the most important factor. The grain refinement mechanism of rolling process is as follows: 60 degrees<100> deformation twins are induced at the initial stage of deformation, and the twins gradually evolve into recrystallized banded structure and divide and refine grains in the subsequent deformation process. Recrystallized grains and twins usually randomize the texture and therefore weaken the concentrated texture produced by the original coarse grain. Rolling deformation can significantly increase the strength of pure tin. The yield strength and tensile strength in TD direction are significantly higher than that in RD direction under unidirectional rolling.
Keyword ：
anisotropy anisotropy grain refinement grain refinement pure tin pure tin rolling rolling twinning twinning
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| GB/T 7714 | Cheng Sang , Zhang Yonggan , Wang Bingshu et al. Effects of Different Rolling Processes on Microstructure and Properties of Pure Tin [J]. | RARE METAL MATERIALS AND ENGINEERING , 2023 , 52 (1) : 206-214 . |
| MLA | Cheng Sang et al. "Effects of Different Rolling Processes on Microstructure and Properties of Pure Tin" . | RARE METAL MATERIALS AND ENGINEERING 52 . 1 (2023) : 206-214 . |
| APA | Cheng Sang , Zhang Yonggan , Wang Bingshu , Deng Liping , Zhou Baoxue , Li Qiang . Effects of Different Rolling Processes on Microstructure and Properties of Pure Tin . | RARE METAL MATERIALS AND ENGINEERING , 2023 , 52 (1) , 206-214 . |
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