Article
Nanoscience & Nanotechnology
Junlei Zhang, Yu Huang, Jin Xiang, Guangsheng Huang, Xiang Chen, Hu Zhou, Bin Jiang, Aitao Tang, Fusheng Pan
Summary: The dissimilar AM60/AZ31 Mg alloys joints were obtained via friction stir welding (FSW) and then remelted using tungsten inert gas (TIG) welding. After arc heating, the joint elongation significantly improved due to the increase of grain size, weakening of texture, and annihilation of initial residual dislocations. This work provides a new method for weakening the strain localization of FSW Mg joints.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Junlei Zhang, Xiang Chen, Shuaishuai Liu, Guangsheng Huang, Bin Jiang, Aitao Tang, Fusheng Pan
Summary: In this study, a defect-free dissimilar AM60/AZ31 Mg joint was obtained by friction stir welding (FSW). Tensile tests were conducted to investigate the tensile behavior of the joint, with microstructure characterization revealing significant grain orientation evolution in the joint after FSW. The reasons for fracture along the centerline of the nugget zone (NZ) in the back face and both the NZ and triple junction region (TJR) interfaces in the front face were explained based on crack initiation and development processes.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Eisha Khalid, Vasanth C. Shunmugasamy, Bilal Mansoor
Summary: This study reports the successful micro friction stir welding (mu FSW) between ultra-thin (500 μm) Mg AZ31 and Al 6061-T6 alloy sheets. The process resulted in a defect-free butt weld with refined grains and strong metallurgical interlocking. The joints showed a joint efficiency of 54.5% with respect to the AZ31 base material, and fracture occurred at the interface between the stir zone/thermomechanically affected zone on the Mg advancing side due to intermetallic compounds. These prepared joints have significant potential for structural applications in micro-assemblies and battery packs.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Xuesong Fu, Ke Chen, Cunli Liu, Min Wang, Xueming Hua
Summary: AZ31 magnesium alloy and DC01 steel were joined by friction stir lap welding. The microstructural features and element distributions of the joint were investigated. The study found that Mg17(Al, Zn)12 particles with high Zn concentration precipitated in the stir zone on the AZ31 side. A bowl-shaped region formed on the DC01 side, with rapid grain size reduction towards the interface. Significant amount of Mg and Al atoms were found in DC01 grains near the interface, and a thin Al-rich layer formed within DC01 grains at the interface. The tensile shear strength of the joint was high, indicating a strong bonding strength.
MATERIALS CHARACTERIZATION
(2022)
Article
Nanoscience & Nanotechnology
Junlei Zhang, Yingxing Zhang, Xiang Chen, Zulai Li, Guangsheng Huang, Fusheng Pan
Summary: Two types of welding processes, DS-FSW and SS-FSW, were used for dissimilar welding between AM60 and AZ31 Mg alloys. The microstructure observation indicated that the microstructure of the joint nugget zone (NZ) under both processes was refined after welding and their grain size was relatively close. The tensile tests revealed that the DS-FSW joint exhibited excellent mechanical properties compared with the SS-FSW joint due to its large processing volume, lower volume proportion of the stirring zone, and symmetrically distributed weld zone structure improved the deformation coordination of the joint, thereby delaying its premature fracture and exhibiting better mechanical properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Metallurgy & Metallurgical Engineering
Junlei Zhang, Han Liu, Xiang Chen, Qin Zou, Guangsheng Huang, Bin Jiang, Aitao Tang, Fusheng Pan
Summary: The study investigated dissimilar friction stir welding using AZ31 and AM60 alloys, revealing that the grain size in the joint was more uniform and refined after welding, although AM60 had larger grains compared to AZ31. The presence of special texture features in the joint led to severe strain localization during bending.
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Xiaopei Wang, Yoshiaki Morisada, Hidetoshi Fujii
Summary: In this study, dissimilar welding of AZ31/ZK60 magnesium alloys was successfully achieved using double-sided friction stir spot welding with adjustable probes, resulting in a strong joint with improved properties.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Engineering, Manufacturing
Mohd Ridha bin Muhamad, Sufian Raja, Mohd Fadzil Jamaludin, Farazila Yusof, Yoshiaki Morisada, Tetsuo Suga, Hidetoshi Fujii
Summary: Friction stir welding between AZ31 magnesium alloy and SPHC mild steel with Al-Mg powder additives resulted in a significant enhancement of tensile strength, with the loss of aluminum in the alloy compensated by the addition of the powder. The well mixed and dispersed Al-Mg powder at the joint interface at a welding speed of 50 mm/min contributed to the welding strength by forming intermetallic compounds.
JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING-TRANSACTIONS OF THE ASME
(2021)
Article
Materials Science, Multidisciplinary
W. C. Ke, J. P. Oliveira, S. S. Ao, F. B. Teshome, L. Chen, B. Peng, Z. Zeng
Summary: A computational fluid dynamics (CFD) model for double-sided friction stir spot welding (FSSW) between AZ31 and ZK60 magnesium alloys using adjustable pins is proposed. The model combines multiple phase flow theories and FLUENT software to track the metal interface and phase distribution. The calculated flow and thermal responses showed good agreement with experimental data. The study provides insights into the stages and phenomena that occur during the FSSW process.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
M. Paidar, S. Mehrez, B. Babaei, S. Memon, O. O. Ojo, H. M. Lankarani
Summary: The AA5083-H112 Al alloy and AZ31 Mg alloy were successfully joined together through the modified friction stir clinching brazing process with pure Zn as an interlayer. The addition of Zn improved the fracture load by forming a brazing zone at the edges of the joint. The joint exhibited high fracture loads under different loading conditions.
Article
Automation & Control Systems
Chunliang Yang, ChuanSong Wu
Summary: A model was developed to study the acoustic plasticity and ultrasonic induced friction reduction (UiFR) effect in ultrasonic vibration enhanced friction stir welding (UVeFSW) of dissimilar Al/Mg alloys. Experimental results showed that the ultrasonic sound pressure and energy were stronger at the aluminum alloy side, and the distribution of acoustic energy exhibited a pattern in the nugget zone. The UiFR effect resulted in a deformed butterfly shape of the friction coefficient at the tool-workpiece interface, reduced heat generation and viscous dissipation, and a less deformed butterfly shape of the heat flux distribution. The calculated results demonstrated that ultrasonic vibration enhanced material flow and promoted the mixing and distribution of dissimilar materials.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Yadong Zhao, Yalong Luo, Haixiao Zhang, Xuefeng Guo, Shuguang Wang, Hongbao Cui, Yangming Zhang, Zhigang Wang, Yafang Zhai
Summary: The study focused on analyzing spindle characteristic signals under different FSLW parameters, establishing a dynamic performance evaluation model, calculating the relative approach degree B, and finding the correlation between characteristic signals and joint properties. The model was validated through mechanical performance testing and microscopic observation, showing consistent results with experimental data.
Article
Materials Science, Multidisciplinary
Junjie Zhao, ChuanSong Wu, Lei Shi
Summary: Understanding the microstructure evolution and influence of ultrasonic vibration on friction stir welding (FSW) of dissimilar Al/Mg alloys is crucial for optimizing process parameters and improving joint quality. This study characterized and compared the microstructure evolutions in the weld nugget zone (WNZ) during FSW and ultrasonic vibration enhanced FSW (UVeFSW). The results showed that ultrasonic vibration had a significant effect on the grain structure of the Mg alloy side, changing the dynamic recrystallization mechanism. The application of ultrasonic vibration improved the degree of dynamic recrystallization in the entire weld.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Sachin Kumar, Chuansong Wu
Summary: The addition of a Ni interlayer between Mg and Al plates significantly improves the strength and quality of Al/Mg joints by eliminating common intermetallic compounds. The Ni interlayered joints show improvements in microstructure and mechanical properties, making them potentially suitable for industrial applications.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Chemistry, Physical
Tifang Huang, Zeyu Zhang, Jinglin Liu, Sihao Chen, Yuming Xie, Xiangchen Meng, Yongxian Huang, Long Wan
Summary: Submerged friction stir welding (SFSW) can decrease the peak temperature and control the thermal gradient of the joint, leading to improvements in weld formation and reduction of intermetallic compounds (IMCs) layer thickness. Compared with conventional friction stir welding (FSW), the thermal accumulation during SFSW process inhibits IMCs formation and enables the formation of a strong mechanical interlocking structure, resulting in increased effective contact area and strength of the joint.
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)