Article
Materials Science, Multidisciplinary
Min Zha, Si-Qing Wang, Tong Wang, Hai-Long Jia, Yong-Kang Li, Zhen-Ming Hua, Kai Guan, Cheng Wang, Hui-Yuan Wang
Summary: A high-strength and high-ductility Mg-Gd-Y-Zn-Zr alloy sheet was successfully achieved via single-pass hard-plate rolling process. The high yield strength is mainly attributed to submicron FGs and strong interactions between densely distributed ?' precipitates and pyramidal < c + a > dislocations in CGs. The activation of multiple slip systems, HDI-hardening effect, and crack suppression effect from ?' particles contribute to the excellent ductility.
MATERIALS RESEARCH LETTERS
(2023)
Article
Chemistry, Physical
Hang Xu, Yuan Li, Luoyi Wu, Fulin Jiang, Dingfa Fu, Jie Teng, Hui Zhang
Summary: The influence of heat treatments on the corrosion behavior of Mg-Re alloy was investigated. It was found that heat treatment can decrease the corrosion rate of the alloy and form fine corrosion grooves. The improved homogeneity and the introduction of beta' precipitate as a corrosion barrier contribute to the reduced corrosion rate.
Article
Engineering, Manufacturing
Xinzhi Li, Xuewei Fang, Daqing Fang, Wei Fu, Xiaoru Zhang, Ke Huang
Summary: In this study, a novel Mg-4.4Gd-2.2Y-1.0Zn-0.5Zr (wt%) alloy with excellent strength-ductility synergy was developed through heat treatment to manipulate precipitates. The mechanisms of gradient microstructure caused by wire-arc DED and precipitates evolution induced by heat treatment were systematically revealed. The enhanced strength and noticeable ductility were attributed to the dense lamellar long period stacking ordered (LPSO) structures and abundant nano-beta ' precipitates. The kinking deformable LPSO structures and special nanoscale closed volume configuration were identified as the major mechanisms of such excellent strength-ductility synergy.
ADDITIVE MANUFACTURING
(2023)
Article
Materials Science, Multidisciplinary
Xixi Qi, Yangxin Li, Xinyu Xu, Yuxuan Liu, Huan Zhang, Qingchun Zhu, Gaoming Zhu, Jingya Wang, Mingxin Huang, Xiaoqin Zeng
Summary: The strength-ductility trade-off dilemma is difficult to avoid in high-strength Mg alloys, especially those with a high volume fraction of precipitates. This paper reports an enhanced strength-ductility synergy in an aged Mg-7.37Gd-3.1Y-0.27Zr alloy at sub-zero temperatures. The study reveals that a high dislocation density and shearable precipitates contribute to the excellent strength-ductility synergy.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
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
Engineering, Manufacturing
Yiling Jiang, Haibo Tang, Zhuo Li, Dongdong Zheng, Yuxuan Tu
Summary: The study investigates the fabrication of Mg-xGd-3Y-0.2Zr alloys using laser directed energy deposition (LDED) and explores the effects of Gd addition on their microstructure and mechanical properties. The results show that the LDED-manufactured alloys exhibit improved hardness, yield strength, ultimate tensile strength, and elongation compared to their as-cast counterparts.
ADDITIVE MANUFACTURING
(2022)
Article
Nanoscience & Nanotechnology
Dongdong Zhang, Chuming Liu, Shunong Jiang, Yonghao Gao, Yingchun Wan, Zhiyong Chen
Summary: This study investigates the effects of extrusion temperature and extrusion ratio on the microstructure, precipitates, and mechanical properties of Mg-7.5Gd-1.5Y-0.4Zr-0.5Ag (wt.%) alloy. The results show that the highest strength is achieved in the sample extruded at a temperature of 420 degrees C and an extrusion ratio of 9, due to texture strengthening, bimodal structure, and precipitate strengthening. After peak aging, the sample exhibits improved strength and ductility. The findings of this study provide new insights for the preparation of high-performance Mg alloys by combining multiple strengthening mechanisms.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Jianxin Zhou, Hong Yang, Jianfei Xiao, Bin Jiang, Xiaojun Luo, Wenlong Xie, Wei Li, Zhihua Dong, Jiangfeng Song, Junyao Xu, Guangsheng Huang, Dingfei Zhang, Fusheng Pan
Summary: The microstructural features of long period stacking ordered (LPSO) phase in Mg-Gd-Y-Zn-Zr alloys were optimized through adjusting Gd/Y ratios. Superior high-temperature strength was obtained in the extruded 6Gd-5Y alloy, which was attributed to the formation of block-shaped and lamellar LPSO phases.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Rui Jiang, Shengnan Qian, Chuang Dong, Ying Qin, Yujuan Wu, Jianxin Zou, Xiaoqin Zeng
Summary: This study demonstrates that Mg-Gd-Y-Zr alloys with high strength fall within a narrow composition range, and by establishing specific chemical units, alloys with the strongest precipitation tendency and highest strength can be designed.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(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
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
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
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
Chemistry, Physical
Xixi Qi, Yangxin Li, Xiaoqin Zeng
Summary: This study investigates the impact of activating and accumulating prismatic < a > dislocations on the ductility of a Mg-7.37Gd-3.1Y-0.27Zr (GW83K) alloy at sub-zero temperatures. It is observed that prismatic < a > dislocations are more easily activated at lower temperatures due to a decrease in the ratio of CRSS prismatic < a > to CRSS basal < a > in this alloy. Increasing the proportion of prismatic < a > dislocations has limited effect on improving the early-stage deformation ductility of GW83K alloy at sub-zero temperatures, as the prismatic < a > dislocations cannot accommodate c-axis deformation. However, the accumulation of prismatic < a > dislocations leads to the formation of low-angle grain boundaries rotating along the [0001] axis, resulting in improved ductility in the late-stage deformation of GW83K alloy. This finding offers a new perspective on the contribution of prismatic < a > dislocations to ductility in Mg alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
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
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)