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学者姓名：邓丽萍
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Abstract ：
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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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.
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, Jingxian , An, Qiaojuan , Deng, Liping et al. Activation mechanism of multiple twin variants during uniaxial compression in pure titanium [J]. | JOURNAL OF ALLOYS AND COMPOUNDS , 2025 , 1024 . |
| MLA | Chen, Jingxian et al. "Activation mechanism of multiple twin variants during uniaxial compression in pure titanium" . | JOURNAL OF ALLOYS AND COMPOUNDS 1024 (2025) . |
| APA | Chen, Jingxian , An, Qiaojuan , Deng, Liping , Ye, Peng , Wang, Chen , Chen, Junfeng 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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The laminated carbon-nanotubes/Cu (CNTs/Cu) composites were fabricated by electrophoretic deposition (EPD), spark plasma sintering (SPS), and hot rolling to achieve a good combination of properties. The microstructure, mechanical properties, and electrical conductivity were investigated, and the strengthening mechanism was discussed. Results indicated that functional groups were introduced onto the surface of CNTs after acid treatment, enabling the formation of an optimal CNT deposition morphology on the Cu matrix at an electrophoretic deposition voltage of 75 V. The sintered CNTs/Cu composite exhibits a laminated structure with coarse grains and randomly distributed textures. Compared to sintered pure Cu, the sintered composite demonstrates a 42.07 % increase in tensile strength and a 17.8 % improvement in elongation. And the electrical conductivity reaches 93.05 % of the International Annealed Copper Standard (IACS). Subsequent hot rolling refined the grains and reoriented the texture to deformation textures. The hot-rolled composites achieve a tensile strength of 355 MPa, an elongation of 12.2 %, and a conductivity of 85.53 % IACS. The strengthening mechanisms of CNTs/Cu composites involve grain refinement, load transfer, and thermal mismatch strengthening, with grain refinement as the primary factor. Grain refinement, crack deflection, and bridging-pullout of CNTs are mainly responsible for the good combination of strength, ductility and electrical conductivity.
Keyword ：
Carbon-nanotubes/Cu composites Carbon-nanotubes/Cu composites Electrophoretic deposition Electrophoretic deposition Laminated structure Laminated structure Microstructure Microstructure Strengthening Strengthening
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| GB/T 7714 | Wu, Hanqun , Deng, Liping , Pan, Xincheng et al. Study on the microstructure, properties and strengthening mechanisms of electrophoretic deposited carbon-nanotubes/Cu composites [J]. | MATERIALS CHARACTERIZATION , 2025 , 221 . |
| MLA | Wu, Hanqun et al. "Study on the microstructure, properties and strengthening mechanisms of electrophoretic deposited carbon-nanotubes/Cu composites" . | MATERIALS CHARACTERIZATION 221 (2025) . |
| APA | Wu, Hanqun , Deng, Liping , Pan, Xincheng , Wang, Bingshu , Xiang, Hongliang . Study on the microstructure, properties and strengthening mechanisms of electrophoretic deposited carbon-nanotubes/Cu composites . | MATERIALS CHARACTERIZATION , 2025 , 221 . |
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Ti6Al4V is widely utilized in orthopedic implants due to its excellent mechanical properties, corrosion resistance, and biocompatibility. However, traditional solid titanium implants exhibit an elastic modulus (90-115 GPa) significantly higher than that of human bone (10-30 GPa), leading to stress shielding and implant loosening. To address this, porous titanium alloys have been developed to better match bone elasticity. Additive manufacturing, particularly selective laser melting (SLM), enables precise control over pore size and porosity, thereby tuning mechanical properties. Nevertheless, SLM-produced porous structures often suffer from powder adhesion, which compromises bone integration and patient safety. In this study, bulk Ti6Al4V samples were fabricated via SLM with a fixed laser power of 200 W and varying scanning speeds (800-1400 mm/s). Density measurements and surface defect analysis identified 1200 mm/s as the optimal scanning speed. Cubic unit cell scaffolds with different pore diameters (400, 600, 800 mu m) and porosities (60%, 80%) were subsequently designed. Compression tests revealed that scaffolds with a 400 mu m pore diameter and 60% porosity exhibited the highest compressive strength (794 MPa) and fracture strain (41.35%). Chemical polishing using a diluted HF-HNO3 solution (1:2:97) effectively removed adhered powder without significant structural degradation, with 40 min identified as the optimal polishing duration.
Keyword ：
3D printing 3D printing chemical polishing chemical polishing mechanical properties mechanical properties porous titanium alloys porous titanium alloys selective laser melting (SLM) selective laser melting (SLM)
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| GB/T 7714 | Li, Tairong , Xu, Mengyu , Yao, Jinzhi et al. Preparation and Post-Processing of Three-Dimensional Printed Porous Titanium Alloys [J]. | MATERIALS , 2025 , 18 (8) . |
| MLA | Li, Tairong et al. "Preparation and Post-Processing of Three-Dimensional Printed Porous Titanium Alloys" . | MATERIALS 18 . 8 (2025) . |
| APA | Li, Tairong , Xu, Mengyu , Yao, Jinzhi , Deng, Liping , Wang, Bingshu . Preparation and Post-Processing of Three-Dimensional Printed Porous Titanium Alloys . | MATERIALS , 2025 , 18 (8) . |
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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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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 (6) : 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 . 6 (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 (6) , 62-66 . |
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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.
Keyword ：
Gradient structure Gradient structure Mechanical properties Mechanical properties Pure copper Pure copper Texture evolution Texture evolution Torsion Torsion
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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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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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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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"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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