Article
Chemistry, Physical
Han Chen, Yuxiang Han, Chuming Liu, Zhiyong Chen
Summary: The effects of unidirectional rolling and cross-rolling on the microstructure and mechanical anisotropy of Mg-10Gd-2Y-0.4Ag-0.4Zr alloy plates were investigated. It was found that the unidirectional rolling plate had a finer grain size and obvious dynamic precipitation response, while the cross-rolling plate had a more uniform microstructure with larger grain size. The unidirectional rolling plate exhibited a strong mechanical anisotropy due to the presence of TD-split texture and anisotropic distributed particle strips, whereas the cross-rolling plate showed reduced yield anisotropy and elongation anisotropy due to the more uniform microstructure and rare RT-split texture.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Jun Cai, Lin Chen, Peng Han, Juan Yang, Qingxiang Yang, Qingyang Li, Ben Ding, Ke Qiao, Jiang Li, Qian Zhao, Wen Wang, Kuaishe Wang
Summary: The hot deformation behavior of Mg-9.16Gd-3.03Y-1.44Zn-0.61Zr alloy was investigated through hot compression experiments, optical microscopy, electron back-scatter diffraction, and transmission electron microscopy. The results revealed that the alloy exhibited dynamic recrystallization under high temperature and strain rate conditions, and the volume fraction of dynamic recrystallization grains was influenced by temperature and strain rate.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
Hao Pang, Quanan Li, Xiaoya Chen, Peijun Chen, Xiangyu Li, Jinfeng Tan
Summary: The deformation behavior of Mg-Gd-Y(-Sm)-Zr alloys during high-temperature uniaxial compression was investigated. The dynamic recrystallization critical strain was calculated and verified. The hot deformation activation energy and constitutive equation were calculated, and the effect of Sm on microstructure evolution was analyzed. The results showed that the addition of Sm increased flow stress and delayed dynamic recrystallization.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Yi Yao, Chuming Liu, Yonghao Gao, Shunong Jiang
Summary: This study elucidated the microstructural and textural heterogeneities of a large-size Mg alloy ring fabricated by hot ring rolling, and revealed the deformation mechanisms during the process. The research sheds light on the manufacturing of large-size Mg alloy structural components and provides a clue for improving their microstructural and mechanical homogeneity.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
Qian Zhang, Quanan Li, Xiaoya Chen, Jiaxin Zhao, Jian Bao, Ziyi Chen
Summary: In this study, the microstructure evolution and dynamic recrystallization mechanism of Mg-Gd-Y-Zr alloy under different deformation conditions were analyzed in detail. It was found that dynamic precipitation occurs prior to dynamic recrystallization, and large-size hard phase particles can induce dynamic recrystallization under high strain conditions, promoting grain refinement.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Z. Aalipour, A. Zarei-Hanzaki, A. Moshiri, H. R. Abedi, Daudi Waryoba, A. Kisko, L. P. Karjalainen
Summary: The microstructure and microtexture changes of an extruded and annealed magnesium alloy were investigated under different strain and processing conditions. The results showed that the material underwent noticeable refinement even at low applied compressive strain. Recrystallization process was completed at a true strain of 0.3, and grain refinement was attributed to the LSN and CDRX mechanisms. At higher strain levels, most grains were found in deformed states and the microtexture only changed in terms of intensity.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
Yuanqing Chi, Jinwei Liu, Zhijie Zhou, Shouzhong Wu, Weiqing Liu, Mingyi Zheng
Summary: This study mainly investigates the microstructure, texture, and mechanical properties of Mg-Gd-Y alloys (Mg-8.5Gd-2.5Y-0.3Zr (wt%) (0Zn) and Mg-8.5Gd-2.5Y-0.5Zn-0.3Zr (wt%) (0.5Zn) alloys) under indirect extrusion at different temperatures. The addition of 0.5 wt% Zn promotes the dynamic precipitation of beta-Mg5RE phases, resulting in a well-distributed distribution in the 0.5Zn alloy compared to a local distribution in the 0Zn alloy. The presence of zinc and the extrusion temperature influence the texture formation and mechanical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Coatings & Films
Linbo Chen, Wei Li, Mei Luo
Summary: In this study, an Mg-Y-Nd-Gd-Zr alloy was subjected to ultrasonic surface rolling processing to create a deformation layer with a double-gradient microstructure. The observed stacking faults hindered dislocation motion and improved the yield strength of the alloy. However, these stacking faults also increased stress concentration and promoted premature fracture failure at the top surface, reducing the plasticity of the alloy.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Mozhgan Shokri, Abbas Zarei-Hanzaki, Hamid Reza Abedi, Jae Hyung Cho
Summary: The study investigated the correlation between microstructure/texture evolutions and high temperature flow behavior in Mg alloy containing long period stacking order (LPSO) phases. The annealing treatment effectively strengthened the alloy and decreased ductility, with blocky LPSO assisting dynamic recrystallization and lamellar LPSO increasing alloy strength. The findings suggest that microstructure and texture evolution play a significant role in the high-temperature behavior of the Mg alloy.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Cunlong Wang, Hongtao Li, Qiyang He, Jili Wu, Guohua Wu, Wenjiang Ding
Summary: The paper reports a comparative study on the influence of environmental temperature on microstructural evolution and tensile mechanical behaviors of squeeze cast and gravity cast magnesium alloys. The results show that the ultimate tensile strength and elongation of the squeeze cast alloy are improved compared to the gravity cast alloy. The abnormal increase in strength within a certain elevated temperature range is attributed to insufficient strain hardening at lower temperatures, restricting further plastic deformation.
MATERIALS CHARACTERIZATION
(2022)
Article
Nanoscience & Nanotechnology
Wenlong Xu, Xianhua Chen, Fusheng Pan
Summary: An investigation was conducted on the microstructure and mechanical anisotropy of Mg-6Zn-xY-0.5Ce-0.4Zr (MZCZ-xY) alloys with varying Y contents subjected to asynchronous rolling (ASR). The addition of Y significantly influences the microstructure and mechanical anisotropy of the alloys. Increasing Y content promotes grain growth in the as-cast state and the activation of tensile twins after ASR treatment. The regulation of mechanical anisotropy in Mg alloys can be achieved by obtaining uniform texture components and uniform Schmid factor (SF) in each loading direction.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
Xiaojie Zhou, Wenying Xiong, Gang Zeng, Hongchao Xiao, Jian Zhang, Xianzheng Lu, Xiaomin Chen
Summary: The combined effects of LPSO orientation and alpha-Mg texture on tensile anisotropy were investigated, with the extrusion direction showing optimal mechanical properties, the 45 degrees direction exhibiting high elongation, and the transverse direction having inferior strength and elongation simultaneously. LPSO orientation contributes to strength anisotropy through different load-bearing strengthening effects along different tensile axes, while alpha-Mg texture contributes to strength anisotropy through stronger grain boundary strengthening effects. However, LPSO orientation, rather than alpha-Mg texture, accounts for ductility anisotropy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Yaocheng Zhang, Zheng Liu, Song Pang, Tao Meng, Yating Zhi, Yuling Xu, Lv Xiao, Ruifeng Li
Summary: The study evaluated the tensile creep behavior of GW83 alloy under different temperature and stress conditions, showing that increasing temperature and stress significantly affect the creep performance. T6 treatment can greatly improve the creep resistance of the alloy, and the tensile creep plastic deformation is mainly controlled by the applied stress.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Heqian Song, Lunyong Zhang, Zhiliang Ning, Yufeng Wang, Junying Yi, Fuyang Cao, Jianfei Sun
Summary: The study found that the surface oxidation film defect of Mg-Gd-Y-Zr alloy during solidification is related to the difference in thermal expansion coefficient and can cause the formation of bifilm defects. When the magnesium alloy melt fills the crack, Zr precipitates into crystal nucleus and Y2O3 accumulates.
Article
Chemistry, Physical
Dongdong Zhang, Chuming Liu, Shunong Jiang, Yonghao Gao, Yingchun Wan, Zhiyong Chen
Summary: The effects of thermal mechanical parameters on the flow behaviors and microstructure evolution of a Mg-7.5Gd-1.5Y-0.4Zr-0.5Ag alloy were investigated. It was found that increasing temperature or decreasing strain rate can improve dynamic recrystallization (DRX) degree, reduce flow stress, and weaken texture intensity. Basal < a > and prismatic < a > slip were identified as the dominant deformation mechanisms during hot compression. The study provides important insights for controlling DRX behavior and texture characteristics in manufacturing large-scale wrought Mg alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Shuai Zhang, Shuye Zhang, Hongzhi Zhou, Kyung-Wook Paik, Tianran Ding, Weimin Long, Sujuan Zhong, Peng He
Summary: Microwave Hybrid Heating (MHH) is a promising method for material joining, allowing for selective and uniform heating. This experimental study focused on investigating the characteristics and reliability of joints made using nano-Sn-3.0Ag-0.5Cu soldering paste and MHH technique. The research findings showed that the shear strength of the joints reached its peak value under specific microwave power and exposure time, but decreased after thermal shock tests.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Peibin Ma, Mingyang Wang, Aiying Chen, Lijian Gu, Zhiyi Ding, Xiaogui Wang, Bin Gan
Summary: Nano-twinned boundaries in high-temperature alloys play a crucial role in regulating the distribution of nano-precipitates and enhancing mechanical properties.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Jiachen Zhang, Fan Lu, Xinxin Liu, Taiwen Huang, Rui Li, Changsheng Tan, Guojun Zhang, Lin Liu
Summary: This study investigates the effects of Re and Ta interactions on the precipitation of the TCP phase in experimental alloys under long-term thermal exposure. The study finds that microstructure segregation is not fully eliminated even with standard heat treatment, and the interaction between Re and Ta enhances the formation of the TCP phase. Thermodynamic calculations and first-principles analysis reveal that Re significantly improves the driving force of TCP phase precipitation. The study also observes a phase transition from the sigma-phase to the P-phase, with Ni playing a crucial role in the diffusion process.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Ronit Roy, Adil Shaik, Matthew Topping, Fei Long, Mark R. Daymond
Summary: This study demonstrates the improvements in characterizing localized dislocation distribution using the HR-EBSD method compared to the conventional approach. Two extreme examples of deformation conditions were investigated to show the efficacy of HR-EBSD in identifying dislocations and subtle features. The direct correlation between slip bands and HR-EBSD estimated GNDs is also presented, enhancing the scope of this approach in identifying individual slip bands.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Wenshan Guo, Hui Zhang, Qingjun Zhou, Guangchun Xiao, Ning Guo, Wei Zhao, Gang Wang
Summary: The microstructures and corrosion resistance of TC11 components were significantly improved using a high-power, high-speed laser metal deposition (LMD) process and subsequent post-heat treatment, with greater improvements observed in the deposition direction. The significant improvement of corrosion resistance in the deposition direction is mainly due to the weakening of the charged galvanic corrosion effect between the non-interlayer zone and interlayer zone.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Shuai Xu, Rui Cao, Junheng Gao, Yu Zhang, Haitao Zhao, Shuize Wang, Yuhe Huang, Guilin Wu, Honghui Wu, Chaolei Zhang, Xinping Mao
Summary: In this study, the microstructures and mechanical properties of interphase precipitation strengthening micro-alloyed steels were investigated. The addition of Cr was found to increase the yield strength without significant decrease of ductility. Thermodynamics analysis revealed that the addition of Cr led to grain refinement and decrease of sheet spacing of nanoprecipitates. Calculations showed that the decrease of interphase-precipitated carbides sheet spacing and the refinement of grain size were responsible for the strength enhancement of Cr microalloyed steel.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Zhaoxin Zhong, Biao Zhang, Yuhan Ren, Jian Ye, Jiawei Zhang, Feng Ye
Summary: In this study, bioinspired web-liked multiphase composites were successfully constructed using boron-modified polysilazane polymer. The composites consisted of long TiB nanowires as 'web' and hybrid TiC and Ti3Si particles as 'nodes'. The enhanced strength of these composites was attributed to the synergistic load transfer of the hybrid reinforcements. This study provides a promising design approach for developing high-performance composites with high reinforcement content, utilizing polymer instead of traditional ceramic powder.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Geng Liu, Linran Yu, Jie Su, Ran Ding, Min Xiong, Qi Gao
Summary: In this study, a flash austenitization heat treatment approach was used to achieve a dual-phase microstructure consisting of retained austenite and fine-grained ferrite in low-carbon TRIP steel. Phase-field simulations revealed the acceleration of ferrite transition kinetics in the Mn-depleted region and the influence of chemical heterogeneity of C and Mn on the stabilization of austenite.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Zhichao Yang, Dehui Zheng, Zhen Wang, Tingbin Liang, Shuangbao Wang
Summary: In this study, the configurations, formation process, and properties of the Cu-rich layer formed during TJE of Al alloys were revealed using aberration-corrected scanning TEM (STEM), STEM image simulations, and first-principles calculations. The results showed a new orientation relationship between the Cu-rich layer and Al matrix, and provided insights into the formation mechanisms of the Cu-rich layer and Cu diffusion zone.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Shuai Chen, Ruyu Tian, Jiayue Wen, Yanhong Tian
Summary: In this study, the interfacial microstructure evolution and reliability of Cu/Sn-3.0Ag-0.5Cu (SAC305)/Ni and Cu/Sn-3.0Ag-0.5Cu-0.05TiO2 (SAC305-0.05TiO2)/Ni interconnections under thermal shock were investigated. The results showed that the addition of TiO2 nanoparticles can suppress the growth of interfacial IMCs and improve the reliability of the connections.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Yunbin Lu, Yangju Feng, Wei Wang, Wenke Wang, Jianlei Yang, Wenzhen Chen, Guorong Cui, Dongdong Zhuang, Hongyang Cao
Summary: In order to improve the wear resistance of titanium alloy, titanium matrix composites with network distributed TiBw were fabricated. The results showed that the wear rate of the composites decreased by 17.2% at room temperature and 38.4% at high temperature compared to the TA15 alloy. The TiBw in the composites enhanced work hardening, improved thermal conductivity, and effectively hindered dislocation movement and promoted dynamic recrystallization during high-temperature wear.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Jubert Pasco, Lu Jiang, Thomas Dorin, Ali Keshavarzkermani, Youliang He, Clodualdo Aranas Jr
Summary: The unique structure and solute distribution of CoCrMo alloys produced using Laser Powder Bed Fusion technique require custom heat-treating processes to achieve the targeted phase distribution and mechanical properties. This study investigates the phase transformation behavior and precipitate distribution of CoCrMo samples after aging heat treatment. The results show differences in phase fraction and nucleation sites between directly aged and solution heat-treated samples.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Zipeng Ma, Meng Zhou, Baohong Tian, Yi Zhang, Heng Li, Xu Li, Jin Zou, Haoyan Hu, Ke Jing, Yong Liu, Alex A. Volinsky
Summary: In this study, two electrical contact composites were prepared using the vacuum hot pressing sintering endo-oxidation method. The addition of Y2O3 had no negative effects on the electrical conductivity and hardness of the composites. Moreover, it reduced the welding force and arc energy, and improved the stability of the contacts.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Wei Sun, Ning Cui, Shuling Zhang, Tiewei Xu, Xiaopeng Wang, Fantao Kong
Summary: A laminated composite was successfully fabricated and its microstructure and mechanical properties were investigated. The composite exhibited high bonding strength, improved flexural strength and fracture toughness, and superior tensile properties compared to the monolithic alloy.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Zih-You Wu, Yin-Ku Lee, Su-Yueh Tsai, Po-Yu Chen, Jenq-Gong Duh
Summary: With the development of the artificial intelligence (AI) industries, electronic packaging is advancing towards high density, high efficiency, and multi-functionality. The application of microbumps is necessary to achieve high density and small-scale interconnection. In this study, three types of full intermetallic compounds (IMCs) bumps were fabricated, and the mechanical and thermal properties of IMCs were analyzed. The results showed that the full IMCs bumps with added Ni and Zn exhibited consistent structure and excellent thermal stability, providing a reliable microstructure for application.
MATERIALS CHARACTERIZATION
(2024)