Article
Materials Science, Multidisciplinary
Yipeng Wang, Hong Li, Zhuoxin Li, Yu Zhang, Jian Qin, Guangyu Chen, Bojin Qi, Caiyou Zeng, Baoqiang Cong
Summary: This study proposed a novel double-pulsed variable polarity tungsten inert gas (DP-VPTIG) arc for achieving full penetration welds of 6 mm thick AA2219 aluminum alloy. Compared to the conventional VPTIG arc, the DP-VPTIG arc effectively refined the grain structure, improved the distribution of Cu solute element, and enhanced the microhardness and mechanical properties of the weld zone.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Metallurgy & Metallurgical Engineering
Lai-jun Wu, Xiao-hui Han, Guo-long Ma, Biao Yang, Hong Bian, Xiao-guo Song, Cai-wan Tan
Summary: The effects of welding layer arrangement on the microstructure and mechanical properties of 5083/6005A aluminium alloy gas metal arc welded (GMAW) joints were investigated. Different welding layer arrangements were used to obtain high-quality butt joints. The softening zone in the heat-affected zone (HAZ) of the 6005A alloy side was found to be the weakest part of the 5083/6005A alloy joints. The number of welding layers and passes affected the grain boundary liquation in the partially melted zone (PMZ) and the strength of the softened zone.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2023)
Article
Nanoscience & Nanotechnology
Fuyang Gao, Yongjie Cui, Yifan Lv, Wei Yu, Peng Jiang
Summary: In this paper, 12mm Ti6Al4V titanium was welded using keyhole gas tungsten arc welding technology, with microstructure and properties of the welded joint studied. The tensile strength of the joint reaches 925MPa, with good toughness demonstrated in the weld metal.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Metallurgy & Metallurgical Engineering
Sun Jiaxiao, Yang Ke, Wang Qiuyu, Ji Shanlin, Bao Yefeng, Pan Jie
Summary: In this study, 5356 aluminum alloy forming parts produced by TIG arc additive manufacturing were found to have a microstructure composed of alpha-Al matrix and beta(Al3Mg2) phase. The microstructure evolved from equiaxed grains to columnar grains with deposition height, with a dendritic microstructure in the top layer. The mechanical properties, such as microhardness and anisotropic tensile strength, were affected by pore accumulation and uneven microstructure in the thin-walled parts.
ACTA METALLURGICA SINICA
(2021)
Article
Materials Science, Multidisciplinary
Xiaoyan Yu, Jiaxiang Xue, Qingkai Shen, Zehong Zheng, Ning Ou
Summary: A new low heat-input double-pulse gas metal arc welding (LHDP-GMAW) method was proposed in this study. It can improve the welding quality, resulting in better weld bead shape and higher microhardness.
SCIENCE AND TECHNOLOGY OF WELDING AND JOINING
(2022)
Article
Optics
Peikang Tao, Gaoyang Mi, Chunming Wang, Xiong Zhang
Summary: In this study, double-sided high-power fiber laser welding was used to weld ultra-high strength steel with a thickness of 20 mm. The welding parameters were optimized based on the behavior of molten metal and formation of the weld. The results showed that the optimized welding parameters resulted in uniform welds, with the microstructure predominantly being martensite. However, brittle fracture surfaces were formed at the top and middle of the welds.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Yan Jin, Li Jiang, Fang Liu, Chang-Zheng Xu, Zhi-Jun Li
Summary: ERNiCr-3 alloy deposited using GT-WAAM process exhibits segregation and microstructural gradient feature, leading to a strength degradation at the top. The presence of fine-grain remelting zones improves the tensile properties perpendicular to the deposited direction. This study provides guidance for optimizing the GT-WAAM process for ERNiCr-3 alloy.
Article
Materials Science, Characterization & Testing
Sare Celik, Fatmagul Tolun
Summary: In this study, the effect of double-sided friction stir welding on AA5754 Al alloy was investigated, with the best welding performance observed at a tool rotational speed, feed rate, and tool tilt angle of 450 rpm, 50 mm x min(-1), and 1 degree, respectively.
Article
Materials Science, Multidisciplinary
Yassar E. Mukhrish, Muhammad Asad, Muhammad Azhar Ali Khan, Faramarz Djavanroodi
Summary: This research investigates the use of an automated cladding welding machine for wire arc additive manufacturing (WAAM) of a semi-cylindrical part. The study aims to evaluate the mechanical properties and microstructure of the manufactured part, as well as any potential changes in the properties of the employed Nickel wire. The results show that the hardness of the material is higher than the original wire, and the tensile and yield strengths are lowest in the direction across the thickness. The microstructure analysis reveals a high level of ductility in both parallel and perpendicular orientations to the deposition direction. This confirms the feasibility of using additive manufacturing for this super-alloy material without significant changes in its mechanical properties, with room for improvement by optimizing machine parameters.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Adarsh Kumar, Nilesh Kumar, Mithlesh Kumar Mahto, Surya D. Yadav, Meghanshu Vashista, Mohd Zaheer Khan Yusufzai
Summary: The welding process of Ti-6Al-4V alloy was studied, and a shielding set-up was used to produce coarse β-phase grains and Widmanstaetten morphology in the heat affected zone and weld zone, which improved the resistance to grain boundary sliding and dislocation glide, resulting in enhanced creep resistance in these regions.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Kiyoaki T. Suzuki, Shun Omura, Shun Tokita, Yutaka S. Sato, Yujiro Tatsumi
Summary: In this study, an aluminum alloy sheet was successfully welded to a nickel-plated iron sheet using a silicon-containing aluminum filler by gas tungsten arc welding. The joint strength of the aluminum/iron interface was improved by the simultaneous addition of silicon and nickel, which resulted in a reduction in the intermetallic compound layer thickness and the refinement of its grains. The addition of silicon alone reduced the thickness of the intermetallic compound layer, while the addition of nickel further refined its grains. The combination of silicon and nickel showed the most effective improvement in joint strength.
MATERIALS & DESIGN
(2023)
Article
Nanoscience & Nanotechnology
J. G. Lopes, Priyanka Agrawal, Jiajia Shen, N. Schell, Rajiv S. Mishra, J. P. Oliveira
Summary: In recent years, high entropy alloys (HEAs) have been explored as potential alternatives to traditional engineering alloys. Efforts have been made to improve their mechanical properties and discover new HEAs due to the multitude of compositions allowed by these materials. The processability of HEAs, particularly in welding, is an important topic that needs to be studied. This research examines the microstructure and mechanical behavior of defect-free joints in a Fe50Mn30Co10Cr10 HEA achieved through Gas Tungsten Arc Welding (GTAW). The resulting joints exhibit excellent mechanical performance, making them viable for real-life applications.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
R. Soundararajan, K. R. Ramkumar, S. Sivasankaran, Hyoung Seop Kim
Summary: This study focuses on enhancing the tensile strength of AA 6061-T6 plates by using a HEA filler metal in gas tungsten arc welding. The results show the presence of HEA with Al peaks and the formation of FCC phases after welding. The retention of the HEA phase indicates thermal stability and sluggish diffusion behavior. The welded plates exhibit higher strength and plasticity due to the presence of nanocrystalline HEA and superior interfacial bonding between AA 6061-T6 and HEA elements.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Xu Liu, Ruiling Jia, Huixia Zhang, Wenhua Cheng, Xiwei Zhai
Summary: The microstructure and texture of different zones of friction stir-welded joints of 7A52 aluminum alloy significantly affect fracture behavior, with uneven microstructure providing conditions for crack initiation and becoming the weak point of mechanical properties.
Article
Materials Science, Multidisciplinary
Xiaoan Hu, Jian Zhao, Xuefeng Teng, Xiangfan Nie, Yun Jiang, Yu Zhang
Summary: In this study, the double-sided argon arc welded joint of a titanium alloy, TA15, was treated by laser shock peening (LSP). The hardness, residual stress, fatigue life, and the mechanism of fatigue crack nucleation of the joints before and after LSP strengthening were compared and analyzed. The results showed that LSP treatment increased the surface hardness of the welded joint, transferred the initiation location of fatigue crack, and significantly improved the fatigue life of the joint.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2022)
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)