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学者姓名：卢月美
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Abstract ：
The initial behavior of multi-principal element alloys (MPEAs) is crucial to understanding their deformation mechanism. However, its orientation dependence remains poorly understood. The initial plastic behavior of three typical crystal planes (100), (110) and (111) of FeNiCr MPEA was investigated by nanoindentation experiments, molecular dynamics (MD) simulations and density functional theory (DFT) calculations. Our novel findings reveal that the initial plastic behavior of FeNiCr MPEA is highly orientation-dependent. Specifically, the (111) plane has the highest initial yield load, and (110) plane exhibits the smallest width of displacement burst. This is related to the number of activated slip systems and the evolution behavior of dislocation structure under different crystal orientations. These differences would not lead to different incipient mechanisms and activation volumes. For the first time, MD simulations not only clarify that the dislocation nucleation load is the decisive factor for the initial yield load but also disclose that the incipient behavior of (111) orientation is more sensitive to the lattice distortion (LD). In addition, DFT results unravel that intrinsic LD promotes dislocation nucleation by triggering heterogeneous distribution of charge density. Finally, the orientation dependence of incipient behavior in FCC FeNiCr MPEA shares similarities with conventional metals and other FCC MPEAs, but differs from BCC MPEAs due to their distinct slip systems. The key findings of this paper deepen our understanding of the incipient behavior of MPEAs. © 2025 Elsevier Ltd
Keyword ：
Crystal lattices Crystal lattices Crystal orientation Crystal orientation Ternary alloys Ternary alloys
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| GB/T 7714 | Zhang, X.K. , Fan, J.T. , Xiang, H.L. et al. Unveiling the critical role of crystal orientation in the incipient behavior of FCC FeNiCr multi-principal element alloy [J]. | International Journal of Mechanical Sciences , 2025 , 297-298 . |
| MLA | Zhang, X.K. et al. "Unveiling the critical role of crystal orientation in the incipient behavior of FCC FeNiCr multi-principal element alloy" . | International Journal of Mechanical Sciences 297-298 (2025) . |
| APA | Zhang, X.K. , Fan, J.T. , Xiang, H.L. , Yan, J. , Li, W.P. , Zhao, W. et al. Unveiling the critical role of crystal orientation in the incipient behavior of FCC FeNiCr multi-principal element alloy . | International Journal of Mechanical Sciences , 2025 , 297-298 . |
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Compared to duplex stainless steels (DSSs) prepared by traditional methods, specimens produced through laser powder bed fusion (LPBF) exhibit excellent yield strength but lower elongation. To improve elongation, understanding microstructure evolution during uniaxial tensile testing is crucial. This study investigates the slip behavior, grain boundary evolution, and phase transformation of LPBF 2205 duplex stainless steel during tensile deformation using in-situ electron backscatter diffraction (EBSD). Results show the formation of slip bands, which increase in number as loading stress rises. The primary slip systems activated are {110}<111> in ferrite and {111}<110> in austenite. In the ferrite phase, slip dislocations accumulate and generate low-angle grain boundaries (LAGBs), which evolve into high-angle grain boundaries (HAGBs), refining the grain structure. Numerous Sigma 3 annealing twins form in the austenite phase, but detwinning and twinning reduce Sigma 3 content as deformation processes. Ferrite and austenite exhibit good stability during the initial stages of tensile deformation. However, some austenite transforms into martensite through the transformation-induced plasticity (TRIP) effect at the final stages of deformation, which helps relieve stress concentration and delays material fracture. This study provides valuable insights for optimizing microstructure to improve the mechanical properties of LPBF materials.
Keyword ：
2205 duplex stainless steel 2205 duplex stainless steel In-situ uniaxial tensile testing In-situ uniaxial tensile testing Laser powder bed fusion Laser powder bed fusion Phase transformation Phase transformation Slip behavior Slip behavior
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| GB/T 7714 | Zhao, Wei , Xiang, Hongliang , Zhan, Xianming et al. Microstructure evolution in laser powder bed fusion melted 2205 duplex stainless steel using in-situ EBSD during uniaxial tensile testing [J]. | JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T , 2024 , 33 : 2113-2124 . |
| MLA | Zhao, Wei et al. "Microstructure evolution in laser powder bed fusion melted 2205 duplex stainless steel using in-situ EBSD during uniaxial tensile testing" . | JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 33 (2024) : 2113-2124 . |
| APA | Zhao, Wei , Xiang, Hongliang , Zhan, Xianming , Deng, Tingting , Zhang, Xiangkai , Lu, Yuemei et al. Microstructure evolution in laser powder bed fusion melted 2205 duplex stainless steel using in-situ EBSD during uniaxial tensile testing . | JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T , 2024 , 33 , 2113-2124 . |
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In this paper, the PC/ABS notebook computer shells with PET film were prepared using a combined in-mold decoration and microcellular injection molding (IMD/MIM) process. Then the surface quality, morphology, impact toughness and wear resistance were investigated. The results shown that the surface quality is improved by IMD/MIM technology. The three dimensional surface roughness value (Sa) was about 1/3 of that of MIM parts. The cross-section of IMD/MIM samples have three layers. The first layer is a PET film decoration layer with about 132 mu m thickness, followed by skin layer (about 22 mu m) and foam layer. The range of thickness of the foam layer for the different specimens is about 7803 mu m-7820 mu m.The cell diameter is between 0.532 mu m and 0.638 mu m, which is about 2 times than that of MIM parts. Compared with MIM parts, the shape of the bubbles of IMD/MIM parts is ellipsoid with thinner wall. Moreover, the impact toughness of IMD/MIM parts are higher. The best impact toughness is 21.02 KJ/m2 within the scope of this experiment, which is 74% higher than the corresponding MIM part under the same foaming process. This may due to the PET film and micropores could block the initiation of the tip crack. Meanwhile, the IMD/MIM parts have excellent wear resistance property. In most cases, the wear rate of IMD/MIM parts is about 36.6% of MIM part under the same condition.
Keyword ：
impact impact In-mold decoration In-mold decoration microcellular plastic microcellular plastic notebook computer shell notebook computer shell polycarbonate/acrylonitrile-butadiene-styrene blend polycarbonate/acrylonitrile-butadiene-styrene blend surface roughness surface roughness wear resistance wear resistance
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| GB/T 7714 | Lu, Yuemei , Liu, Jianren , Wang, Liandeng . Morphology and properties of PC/ABS notebook computer shell prepared by a combined in-mold decoration and microcellular injection molding process [J]. | JOURNAL OF CELLULAR PLASTICS , 2024 , 60 (3) : 153-168 . |
| MLA | Lu, Yuemei et al. "Morphology and properties of PC/ABS notebook computer shell prepared by a combined in-mold decoration and microcellular injection molding process" . | JOURNAL OF CELLULAR PLASTICS 60 . 3 (2024) : 153-168 . |
| APA | Lu, Yuemei , Liu, Jianren , Wang, Liandeng . Morphology and properties of PC/ABS notebook computer shell prepared by a combined in-mold decoration and microcellular injection molding process . | JOURNAL OF CELLULAR PLASTICS , 2024 , 60 (3) , 153-168 . |
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本发明涉及一种聚乳酸复合材料模型构建及性能预测方法，包括：S1)构建聚乳酸分子链，进行几何优化；S2)构建不同长度的碳纳米管模型，在其外表面接枝官能团，构建碳纳米管模型和官能化碳纳米管模型；S3)搭建纯聚乳酸材料、碳纳米管/聚乳酸复合材料、官能化碳纳米管/聚乳酸复合材料无定型晶胞；S4)对建立好的模型进行能量最小化和分子动力学驰豫计算；S5)计算晶胞模型力学性能参数；通过改变晶胞的边长达到拉伸目的展示应力应变关系，分析材料拉伸性能；对比分析相同温度、压强条件下三种材料模拟的力学性能参数和应力应变关系，得到预测结果。该方法有利于便捷、准确地预测聚乳酸复合材料的性能，降低实验成本，缩短研发周期。
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| GB/T 7714 | 卢月美 , 白建平 . 一种聚乳酸复合材料模型构建及性能预测方法 : CN202010881982.5[P]. | 2020/8/28 . |
| MLA | 卢月美 et al. "一种聚乳酸复合材料模型构建及性能预测方法" : CN202010881982.5. | 2020/8/28 . |
| APA | 卢月美 , 白建平 . 一种聚乳酸复合材料模型构建及性能预测方法 : CN202010881982.5. | 2020/8/28 . |
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采用熔融挤出注射成型法制备不同碳纳米管(CNTs)用量的碳纳米管/马来酸酐接枝聚丙烯(PPG)/高密度聚乙烯(HDPE) (CNTs/PPG/HDPE)复合材料;研究了复合材料在水润滑工况,50N和150N载荷条件下的摩擦性能;并观察了CNTs的分布及磨损表面形貌和表面粗糙度.结果 表明:CNTs的加入可以有效减轻磨损,在50N和150N的不同载荷条件下,添加1.2％(wt,质量分数)CNTs的CNTs/PPG/HDPE在水润滑摩擦工况条件下都具有低较的磨损率,并能防止剥落的发生.在150N载荷,水润滑条件下,CNTs用量为1.2％(wt,质量分数)制得的CNTs/PPG/HDPE的摩擦系数最小值为0.161,磨损率为0.932×10-5mm3/N·m,粗糙度为2531nm,具有较好的摩擦性能.
Keyword ：
摩擦行为 摩擦行为 水润滑 水润滑 碳纳米管 碳纳米管 高密度聚乙烯 高密度聚乙烯
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| GB/T 7714 | 卢月美 , 施企明 , 刘建仁 et al. CNTs对HDPE基复合材料在水润滑工况下摩擦行为影响的研究 [J]. | 化工新型材料 , 2019 , 47 (5) : 131-134 . |
| MLA | 卢月美 et al. "CNTs对HDPE基复合材料在水润滑工况下摩擦行为影响的研究" . | 化工新型材料 47 . 5 (2019) : 131-134 . |
| APA | 卢月美 , 施企明 , 刘建仁 , 杨孟进 . CNTs对HDPE基复合材料在水润滑工况下摩擦行为影响的研究 . | 化工新型材料 , 2019 , 47 (5) , 131-134 . |
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Microcellular plastics not only have excellent performance, but also can form thin-walled parts. In the paper, the thin-walled microcellular parts (notebook computershell) made of polycarbonate/acrylonitrile-butadiene-styrene blends (PC/ABS) were prepared by foam injection molding with supercritical nitrogen. The morphologies were observed by optical microscope, scanning electron microscope, and optical profiler. The properties (macro-density, impact toughness, thermal conductivity) of the samples were further studied. The results showed that the average cell diameter of the PC/ABS foam was 0.401 mu m. The cell density reached 3.25 x 10(12) cell/cm(3). Compared with unfoamed part, the macro-density of the microcellular part was reduced by 10.9%. Impact toughness of the polycarbonate/acrylonitrile-butadiene-styrene blend (PC/ABS) foam reached 19.9 kJ/m, approximately 2.7 times as great as that of unfoamed part. This may be ascribed that microcellular structure could absorb impact energy resulting in the improvement of toughness. The microcellular structure could also reduce thermal conductivity of the PC/ABS foam. In short, the thin-walled microcellular PC/ABS part with light weight and good toughness could be formed by injection molding with supercritical nitrogen.
Keyword ：
ABS) ABS) acrylonitrile-butadiene-styrene blends (PC acrylonitrile-butadiene-styrene blends (PC injection molding injection molding Microcellular plastic Microcellular plastic polycarbonate polycarbonate supercritical nitrogen supercritical nitrogen thin-walled thin-walled
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| GB/T 7714 | Lu, Yuemei , Yang, Mengjin , Liu, Jianren . Morphology and properties of thin-walled microcellular polycarbonate/acrylonitrile-butadiene-styrene blend foam [J]. | JOURNAL OF CELLULAR PLASTICS , 2019 , 55 (4) : 421-432 . |
| MLA | Lu, Yuemei et al. "Morphology and properties of thin-walled microcellular polycarbonate/acrylonitrile-butadiene-styrene blend foam" . | JOURNAL OF CELLULAR PLASTICS 55 . 4 (2019) : 421-432 . |
| APA | Lu, Yuemei , Yang, Mengjin , Liu, Jianren . Morphology and properties of thin-walled microcellular polycarbonate/acrylonitrile-butadiene-styrene blend foam . | JOURNAL OF CELLULAR PLASTICS , 2019 , 55 (4) , 421-432 . |
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采用熔融共混法制备了多壁碳纳米管/马来酸酐接枝聚丙烯/聚丙烯复合材料.利用差示扫描量热仪测试复合材料的非等温结晶过程,并对热分析结果进行拟合计算;采用偏光显微镜观察复合材料的晶粒形貌及测量晶粒度.结果表明:多壁碳纳米管的加入提高了复合材料的结晶温度,加快了结晶速率,细化了晶粒,并且使晶粒尺寸更加均匀.
Keyword ：
多壁碳纳米管 多壁碳纳米管 晶粒细化 晶粒细化 结晶温度 结晶温度 结晶速率 结晶速率 聚丙烯 聚丙烯
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| GB/T 7714 | 邱大程 , 巫河峰 , 卢宗振 et al. 碳纳米管对聚丙烯基复合材料结晶的影响研究 [J]. | 机电技术 , 2018 , (2) : 52-53,70 . |
| MLA | 邱大程 et al. "碳纳米管对聚丙烯基复合材料结晶的影响研究" . | 机电技术 2 (2018) : 52-53,70 . |
| APA | 邱大程 , 巫河峰 , 卢宗振 , 饶万桁 , 卢月美 . 碳纳米管对聚丙烯基复合材料结晶的影响研究 . | 机电技术 , 2018 , (2) , 52-53,70 . |
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采用差示扫描量热法(DSC)研究了碳纳米管(CNTs)加入量和降温速率对CNTs/接枝马来酸酐聚丙烯(PPG)/聚丙烯(PP)复合材料(CNTs/PPG/PP)的非等温结晶过程的影响,并采用Jeziorny法对DSC结果进行动力学分析.结果表明:当降温速率为20℃/min时,加入CNTs可提高复合材料的结晶温度,当CNTs加入量为1.O％(wt,质量分数)条件下,复合材料的结晶峰温度为117.6℃,比未加CNTs时提高了2.0℃,CNTs的加入同时还使得复合材料结晶度增大,结晶速率加快,且均随着CNTs加入量的增加而增大;CNTs起到了异相形核作用,改变了PP基的形核方式和晶体长大方式;降温速率的增大使得复合材料将在更低的温度下结晶,结晶度增大.
Keyword ：
碳纳米管 碳纳米管 聚丙烯 聚丙烯 非等温结晶 非等温结晶 马来酸酐接枝聚丙烯 马来酸酐接枝聚丙烯
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| GB/T 7714 | 卢月美 , 杨孟进 , 王世伟 et al. CNTs/PPG/PP复合材料的非等温结晶行为 [J]. | 化工新型材料 , 2018 , 46 (6) : 144-147 . |
| MLA | 卢月美 et al. "CNTs/PPG/PP复合材料的非等温结晶行为" . | 化工新型材料 46 . 6 (2018) : 144-147 . |
| APA | 卢月美 , 杨孟进 , 王世伟 , 施企明 , 刘建仁 . CNTs/PPG/PP复合材料的非等温结晶行为 . | 化工新型材料 , 2018 , 46 (6) , 144-147 . |
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针对目前奥氏体中锰钢导热性差、加工时热量不易导出、工件易受热变形而导致加工精度难以保证和切削速度不能提高等问题,研究了Cr,Mo及稀土等合金元素对奥氏体中锰钢热导率及耐磨性能的影响.结果表明,Cr含量约为1％(ω)及Mo含量控制在2％(ω)左右、并加入0.15％(ω)稀土能使奥氏体中锰钢比传统高锰钢的热导率提高19.6％,磨损率降低54.5％,晶粒度由3级提升至5级.
Keyword ：
合金化 合金化 奥氏体 奥氏体 热导率 热导率 稀土 稀土 耐磨性能 耐磨性能 锰钢 锰钢
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| GB/T 7714 | 陈绍春 , 林新强 , 朱康正 et al. 合金化和稀土变质处理对奥氏体中锰钢热导率及耐磨性的影响 [J]. | 过程工程学报 , 2017 , 17 (1) : 144-150 . |
| MLA | 陈绍春 et al. "合金化和稀土变质处理对奥氏体中锰钢热导率及耐磨性的影响" . | 过程工程学报 17 . 1 (2017) : 144-150 . |
| APA | 陈绍春 , 林新强 , 朱康正 , 卢月美 , 叶荣华 , 林洋 et al. 合金化和稀土变质处理对奥氏体中锰钢热导率及耐磨性的影响 . | 过程工程学报 , 2017 , 17 (1) , 144-150 . |
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采用液相共混-热压法制备碳纳米管/聚丙烯复合材料,测试其冲击性能并观察冲击断面及晶粒形貌.结果表明:液相法可将2.O％以内的碳纳米管均匀地分散在聚丙烯中,均匀分散的碳纳米管能提高复合材料的冲击性能,并随着碳纳米管添加量的增加而增大,当碳纳米管添加量为2.0％时,复合材料的冲击强度达到5.47 kJ/m2,为纯PP的2.5倍;而且,复合材料的断裂特征由脆性断裂转变为韧性断裂,这主要归因于碳纳米管在基体中呈网状分布,且均匀分散,充分发挥了其增韧作用,同时,碳纳米管能细化聚丙烯晶粒,具有细晶强化效应.
Keyword ：
冲击性能 冲击性能 复合材料 复合材料 多壁碳纳米管 多壁碳纳米管 细晶强化 细晶强化 聚丙烯 聚丙烯
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| GB/T 7714 | 刘建仁 , 卢月美 . 液相法制备碳纳米管/聚丙烯复合材料的冲击性能 [J]. | 塑料 , 2017 , 46 (6) : 28-30,37 . |
| MLA | 刘建仁 et al. "液相法制备碳纳米管/聚丙烯复合材料的冲击性能" . | 塑料 46 . 6 (2017) : 28-30,37 . |
| APA | 刘建仁 , 卢月美 . 液相法制备碳纳米管/聚丙烯复合材料的冲击性能 . | 塑料 , 2017 , 46 (6) , 28-30,37 . |
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