Article
Chemistry, Physical
Jian Rong, Jia-Ning Zhu, Wenlong Xiao, Xinqing Zhao, Chaoli Ma
Summary: A new Mg-3RE-0.5Zn alloy with high thermal conductivity and acceptable mechanical properties for high pressure die casting has been developed in this study. The combination of superior thermal conductivity and high strength in this alloy is attributed to its unique alloy composition and microstructure. The results of this study will be beneficial for developing new high performance HPDC Mg alloys and promoting their wider application.
Article
Metallurgy & Metallurgical Engineering
Xixi Dong, Lingyun Feng, Shihao Wang, Eric A. Nyberg, Shouxun Ji
Summary: The newly developed die-cast Mg-RE(La,Ce,Nd,Gd)-Al alloy demonstrates good mechanical properties at 300 degrees Celsius, showing higher yield strength and stable stiffness compared to benchmark alloys.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Nanoscience & Nanotechnology
Jian Rong, Wenlong Xiao, Yu Fu, Xinqing Zhao, Peng Yan, Chaoli Ma, Ming Chen, Chen Huang
Summary: A high-performance Mg-7Al-3Ca alloy was prepared via high-pressure die casting method, exhibiting high strength, good thermal conductivity, and acceptable heat resistance. The high strength was attributed to various strengthening mechanisms, while the thermal conductivity was maintained due to the presence of Ca.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Metallurgy & Metallurgical Engineering
Mengwu Wu, Yingying Hou, Lin Hua, Huijuan Ma, Xiaobo Li, Shoumei Xiong
Summary: This study investigates the effect of flow distributor improvement on the microstructure and mechanical properties of AZ91D magnesium alloy samples obtained through high pressure die casting. The results reveal that samples with a more homogeneous microstructure demonstrate higher mechanical properties.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Materials Science, Multidisciplinary
Jian Rong, Wenlong Xiao, Xinqing Zhao, Chaoli Ma, Haimiao Liao, Donglei He, Ming Chen, Meng Huang, Chen Huang
Summary: With the rapid development of the 3C industries, there is a growing demand for high thermal conductivity magnesium alloys with high mechanical performance. In this study, a high-pressure die casting AZEX4441 alloy with good mechanical properties and high thermal conductivity was developed for ultrathin-walled cellphone components. The alloy exhibited a fine microstructure and higher thermal conductivity compared to traditional alloys.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2022)
Article
Chemistry, Physical
Jian Rong, Wenlong Xiao, Xinqing Zhao, Yu Fu, Haimiao Liao, Chaoli Ma, Ming Chen, Chen Huang
Summary: The study balanced high thermal conductivity and high strength in HPDC Mg alloys with Al addition. Results showed that Al addition improved thermal conductivity and electrical conductivity while enhancing strength and elongation of the alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Manufacturing
Mitsuhiro Okayasu, Takahiro Fukui
Summary: The Mg-9.0Al-0.8Zn alloy fabricated via Thixomolding process showed good mechanical properties and failure characteristics; The microstructure of the cold-chamber die-casting sample was similar to that of the Thixomolding sample, but the hot-chamber die-casting sample had large grains and casting defects; Thixomolding process achieved high fatigue strength and crack growth resistance.
INTERNATIONAL JOURNAL OF MATERIAL FORMING
(2021)
Article
Materials Science, Multidisciplinary
Lingyun Feng, Xixi Dong, Mingxu Xia, Xiangzhen Zhu, Gang Ji, Hailin Yang, Bin Wang, Eric A. Nyberg, Shouxun Ji
Summary: A novel high thermal conductivity (TC) and cost-effective die-cast Mg2.8Al3.8-La0.4Nd alloy with enhanced yield strength (YS) was developed. Compared with the commercially widely used AE44 magnesium alloy, the new alloy exhibited improved TC by 13.5% and enhanced YS through the formation of Al-based intermetallic phases at grain boundaries.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Engineering, Manufacturing
Avik Samanta, Robert J. Seffens, Hrishikesh Das, Anthony D. Guzman, Timothy J. Roosendaal, David Garcia, Miao Song, Glenn J. Grant, Saumyadeep Jana
Summary: This study employs friction stir processing to selectively modify the microstructure of high-pressure die-cast aluminum alloy A380. The technique effectively breaks down dendrites and Si particles, resulting in a homogenized distribution and refined microstructure. The process also eliminates porosity and improves the material's mechanical properties.
JOURNAL OF MANUFACTURING PROCESSES
(2022)
Article
Materials Science, Multidisciplinary
Jung Eun Kim, Ye Jin Kim, Jun Ho Bae, Bong Sun You, Sung Hyuk Park
Summary: This study investigates the microstructural characteristics, tensile properties, and high-cycle fatigue properties of a die-cast Mg-6Al-0.1Mn-0.1Zn-0.3Ca-0.2Y (SEN6) alloy with high corrosion and ignition resistances. The average grain size of the SEN6 alloy is smaller at the surface region compared to the center region due to higher cooling rate. The presence of Ca and Y results in the formation of various particles. The alloy exhibits a tensile yield strength, ultimate tensile strength, elongation, and fatigue limit. Different types of pores act as crack initiation sites during tension and fatigue. The relationship between fatigue limit and ultimate tensile strength is observed in the SEN6 alloy.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Feng Wang, Shi-Jie Sun, Zhi Wang, Bo Yu, Ping-Li Mao, Zheng Liu
Summary: In this study, the influences of Sn element and heat treatment on Mg-7Al alloy prepared by vacuum die cast (VDC) were investigated. It was found that the addition of 2 wt% Sn can increase the ultimate tensile strength of the alloy by 25%, and heat treatment can further improve the mechanical properties of the alloy, especially after solution treatment.
Article
Materials Science, Multidisciplinary
Jia-Sheng Li, Mei-Xuan Li, Zhen-Ming Hua, Zhang-Ting Hu, Hui-Yuan Wang
Summary: This study systematically investigates the effect of minor Ce addition on the microstructure evolution and mechanical properties of rolled Mg-0.6Al-0.5Mn-0.2Ca alloy sheets. The Ce addition leads to changes in phase structure and improves the tensile strength. However, it also results in grain growth and abnormal grain growth.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Chuan Xu, Xinjian Yuan
Summary: High frequency ultrasonic vibration was used for arc welding of MB3 Mg alloy to improve welding defects and microstructure issues. By optimizing experimental parameters, Mg alloy joints with favorable mechanical properties were obtained. However, excessive ultrasonic power could degrade tensile strength.
Article
Metallurgy & Metallurgical Engineering
Junyan Feng, Bo Xing
Summary: This study investigated the effects of injection velocity on the microstructure and mechanical properties of AM60 alloy in semisolid rheo-die casting. The results showed that increasing the injection velocity resulted in smaller particle size and more uniform distribution of primary alpha-Mg particles. However, excessive velocity led to increased porosity and prominent oxide inclusion defects.
INTERNATIONAL JOURNAL OF METALCASTING
(2023)
Article
Metallurgy & Metallurgical Engineering
Suming Zhu, Trevor B. Abbott, Jian-Feng Nie, Hua Qian Ang, Dong Qiu, Kazuhiro Nogita, Mark A. Easton
Summary: The re-evaluation of magnesium die-casting alloy AE44 with minor Mn addition shows that T5-aged AE44 exhibits a better strength-ductility combination and improved creep resistance. The findings suggest that precipitation hardening of the alpha-Mg matrix plays a more important role than grain boundary reinforcement by intermetallic phases in enhancing the creep resistance of die-cast Mg alloys. These results could open up new application perspectives for AE44, particularly in the automotive industry.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Nanoscience & Nanotechnology
Ahmad Mirzaei, Peter D. Hodgson, Xiang Ma, Vanessa K. Peterson, Ehsan Farabi, Gregory S. Rohrer, Hossein Beladi
Summary: This study investigated the influence of parent austenite grain refinement on the intervariant boundary network in a lath martensitic steel. It found that refining the parent austenite grain led to a decrease in the fraction of certain boundaries in the martensite and an increase in the connectivity of low energy boundaries, ultimately improving the impact toughness.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
N. L. Church, C. E. P. Talbot, L. D. Connor, S. Michalik, N. G. Jones
Summary: Metastable beta Ti alloys based on the Ti-Nb system have attracted attention due to their unique properties. However, the unstable cyclic behavior of these alloys has hindered their widespread industrial use. Recent studies have shown that internal stresses, including those from dislocations, may be responsible for this behavior. This study demonstrates that inter-cycle thermal treatments can mitigate the unstable cyclic behavior, providing a significant breakthrough in our understanding of Ti-Nb superelastic materials.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Di Zhao, Chenchen Zhao, Ziyang Xiu, Jiuchun Yan
Summary: This study proposes a novel strategy for achieving the bonding of SiC ceramic and Al alloy using ultrasound. The ultrasound promotes the dissolution of Al into the solder, activating the solder and triggering the interfacial reaction between SiC ceramic and solder. With increasing ultrasonic duration, the bonding between SiC and Al transitions from partial to full metallurgical bonding.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Kang Du, Yang Zhang, Guangda Zhao, Tao Huang, Liyuan Liu, Junpeng Li, Xiyu Wang, Zhongwu Zhang
Summary: This paper systematically investigated the evolution of microstructure in Fe-Ni-Co-Al polycrystalline alloys and its effects on mechanical properties. The results revealed that the migration of grain boundaries in different processes is driven by different factors, which impacts the grain orientation and precipitate formation. In the process of directional recrystallization, grains with specific orientations grow in the grain boundary region and form the dominant orientation, while grains with lower migration rate form the minor orientation. The alloy produced through directional recrystallization exhibited good recoverable strain and superelastic strain, while the alloy produced through solid solution treatment showed no evident superelastic behavior.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Edohamen Awannegbe, Liang Chen, Yue Zhao, Zhijun Qiu, Huijun Li
Summary: This study employed laser metal deposition to additively manufacture Ti-15Mo wt% alloy, and subsequently subjected it to post-fabrication uniaxial thermomechanical processing. The results showed that different zones in the microstructure remained after processing, and deformation mechanisms mainly involved slip and martensite formation. The compressive mechanical properties were found to be dependent on strain rate, with higher flow stress and compressive strength observed at higher strain rates. Grain structure homogenisation was not achieved, leading to anisotropic tensile properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Reza Khatib Zadeh Davani, Enyinnaya George Ohaeri, Sandeep Yadav, Jerzy A. Szpunar, Jing Su, Michael Gaudet, Muhammad Rashid, Muhammad Arafin
Summary: This research aims to investigate the effect of roughing and finishing reductions on crystallographic texture. The results show significant heterogeneity in the centerline region, with higher intensity of certain textures. Drop Weight Tear Test indicates that steel specimens with lower and medium reductions exhibit superior low-temperature impact toughness compared to steel with higher reductions. The electrochemical hydrogen charging experiments confirm the presence of internal hydrogen cracks only in steel with lower and medium reductions.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Flavio De Barbieri, Denis Jorge-Badiola, Rodrigo Allende, Karem Tello, Alfredo Artigas, Franco Perazzo, Henry Jami, Juan Perez Ipina
Summary: This study examines the effect of Cr additions on the mechanical behavior of TWIP steel at temperatures ranging from 25°C to 350°C. The results indicate that different temperature-dependent strengthening mechanisms, including mechanical twinning, Dynamic Strain Aging, and slip bands, are at play. The stacking fault energy (SFE) influences the percentage of mechanical twinning, which in turn affects the strain hardening rate.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Hanlin Peng, Siming Huang, Ling Hu, Bingbing Luo, Liejun Li, Ian Baker
Summary: This study explores the weldability, microstructures, and mechanical properties of two L1(2)-nanoparticle-strengthened medium-entropy alloys after electron beam welding (EBW). The results show that strong yet ductile defect-free joints were produced, with larger grain sizes in the fusion zones compared to the heat-affected zones and base materials. Both EBWed MEAs exhibited high yield strengths, high ultimate tensile strengths, and good fracture strains at 77 K. The V-doping improved the cryogenic mechanical properties of the TMT MEA.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yongxin Wang, Lei Chen, Lizi Shao, Shuo Hao, Motomichi Koyama, Xingzhou Cai, Xiaocong Ma, Miao Jin
Summary: This study investigated the tensile deformation behavior of an Mn-N bearing lean duplex stainless steel with metastable austenite. The results showed that the strain rate had significant influence on the work hardening, strain-induced martensitic transformation, and fracture mechanism.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Jong Woo Won, Seulbi Lee, Hye-Jeong Choe, Yong-Taek Hyun, Dong Won Lee, Jeong Hun Lee
Summary: Cold-rolled pure titanium showed improved sheet formability after undergoing cryogenic-deformation treatment. This treatment increased the thinning capability of the titanium and suppressed cracking during sheet forming. The formation of twins during deformation contributed to high thinning capability and increased strength through grain refinement and dislocation accumulation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Handong Li, Lin Su, Lijuan Wang, Yanbin Jiang, Jiahui Long, Gaoyong Lin, Zhu Xiao, Yanlin Jia, Zhou Li
Summary: Homogenization heat treatment is a key procedure in controlling the second phase, enhancing composition uniformity, and workability of as-cast Cu-15Ni-8Sn alloy. This study found that electropulsing treatment (EPT) can significantly reduce treatment temperature and time, improve elongation and overall mechanical properties of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yuxuan Wang, Juntao Zou, Lixing Sun, Yunfei Bai, Zhe Zhang, Junsheng Cheng, Lin Shi, Dazhuo Song, Yihui Jiang, Zhiwei Zhang
Summary: A novel mechanical-heat-electricity synergistic method was proposed to enhance the mechanical properties of Cu-15Sn-0.3Ti alloy by forming annealing twins (ATs). The combination method of Rotary swaging (RS) and Electric pulse treatment (EPT) successfully induced recrystallization and refinement of the microstructure, leading to a significant increase in the strength of the alloy within a short time.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Zhiyi Ding, Jiangtao Xie, Tong Wang, Aiying Chen, Bin Gan, Jinchao Song
Summary: This study demonstrated the Ta-induced strengthening of CoCrNi-AlTi MEAs using nanoscale heterogeneous coherent precipitates. The addition of Ta and aging treatments significantly enhanced the mechanical properties of the alloy, including yield strength, ultimate tensile strength, and elongation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Z. Y. You, Z. Y. Tang, B. Wang, H. W. Zhang, P. Li, L. Zhao, F. B. Chu, H. Ding
Summary: The mechanical properties and microstructural evolution of C-doped TRIP-assisted HEA under dynamic loading conditions were systematically investigated in this study. The results showed that dynamic tensile deformation led to an increase in yield strength and a decrease in ultimate tensile strength, with a trend towards increased total elongation. The primary deformation mechanisms shifted from TRIP and TWIP effects to deformation twinning and dislocations. The presence of carbides formed through C-doping hindered dislocation slip and promoted the activation of multiple twinning systems.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Feng Qin, Feihu Chen, Junhua Hou, Wenjun Lu, Shaohua Chen, Jianjun Li
Summary: Plastic instability in strong multilayered composites is completely suppressed by architecting nanoscale BCC Nb crystalline-amorphous CuNb interfaces.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)