Article
Materials Science, Multidisciplinary
Zhe Liu, Zhiyu Fan, Li Liu, Shu Miao, Zhicheng Lin, Chungui Wang, Yunqiang Zhao, Renlong Xin, Chunlin Dong
Summary: In this study, 1 mm-thick AZ31 magnesium alloy sheets were joined by refill friction stir spot welding. The metallurgical features, microstructure, texture, and mechanical response of the spot-welded joints were investigated, and the effect of welding parameters on joint performance was evaluated. The results showed that the highest lap shear strength was achieved with a rotational speed of 1500 rpm and a plunge depth of 1.4 mm. A fine-grain structure was observed in the stir zone, and the grain size decreased with lower rotational speed and plunge depth. Furthermore, strain localization was observed during tensile deformation in the spot weld, and the mechanism behind this phenomenon was discussed.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
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
Engineering, Mechanical
Mojtaba Sadeghi Gogheri, Masoud Kasiri-Asgarani, Hamid Reza Bakhsheshi-Rad, Hamid Ghayour, Mahdi Rafiei, Ahmad Mostafa, Filippo Berto
Summary: Friction stir welding is a solid-state joining process that is effectively used to join different materials. This study focuses on the parameter optimization of friction welding on the shear strength of titanium and magnesium alloy joint. The results show that rotation speed and friction pressure significantly affect the shear strength.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Materials Science, Multidisciplinary
Cheng-Gang Wei, Sheng Lu, Liang-Yu Chen, Mao-You Xu
Summary: This study investigates the welding temperature and joint characteristics of AZ31 magnesium alloy under different FSW conditions. The results show that UHaFSW can effectively improve the non-uniform temperature distribution, resulting in enhanced mechanical properties of the joints.
Article
Nanoscience & Nanotechnology
Yuyu Li, Bowen Yang, Tingzhuang Han, Zhibing Chu, Leifeng Tuo, Chun Xue, Qianhua Yang, Xiaodong Zhao, Hong Gao
Summary: This study conducted experiments and model analysis on the effects of pre-deformation on the microstructure and plastic deformation mechanism of AZ31 magnesium alloy. The results showed that a higher pre-deformation strength led to a greater yield strength in the corresponding secondary compression process. Additionally, the activation of {1011} compression twin significantly influenced the secondary compression plasticity of the magnesium alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Jingkai Feng, Dingfei Zhang, Hongjun Hu, Yang Zhao, Xia Chen, Bin Jiang, Fusheng Pan
Summary: During semi-solid extrusion, AZ31 magnesium alloy exhibits a higher nucleation rate for new fine grains and limited twinning activation, resulting in a homogeneous microstructure and improved mechanical properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Banglong Fu, Junjun Shen, Uceu F. H. R. Suhuddin, Ayrton A. C. Pereira, Emad Maawad, Jorge F. dos Santos, Benjamin Klusemann, Michael Rethmeier
Summary: The study introduced a novel solid-state spot welding method, refill friction stir spot welding (refill FSSW), to weld AZ31 Mg alloy to galvanized DP600 steel, achieving defect-free welds with high strength. Various interfacial reactions and the relationship between interfacial structure and fracture behavior were investigated, showing that the presence of Zn coating and Fe-Al layer played a crucial role in the welding mechanism.
MATERIALS & DESIGN
(2021)
Article
Materials Science, Multidisciplinary
Wenyong Niu, Dongxiao Wang, Guiqiao Wang, Jianping Li
Summary: This study investigates the microstructure and mechanical properties of AZ31 magnesium alloy through asynchronous rolling. The results show that rolling with a higher roll speed ratio leads to a more refined grain structure and continuous dynamic recrystallization. The samples rolled with a speed ratio of 1.3 exhibit significantly improved tensile strength and elongation in both rolling and transverse directions compared to conventional rolling processes. The enhancement in elongation can be attributed to recrystallization and favorable Schmidt factor introduced by recrystallized grains. Overall, this research highlights the benefits of asynchronous rolling in refining the microstructure and enhancing the mechanical properties of AZ31 magnesium alloy.
Article
Nanoscience & Nanotechnology
Shixiang Cheng, Fencheng Liu, Yang Xu, Chunyu Li, Fenggang Liu, Chunping Huang, Xin Lin, Haizhong Zheng
Summary: Cold metal transfer (CMT) arc with various oscillation patterns was used to fabricate thin-wall AZ31 magnesium alloy components. The microstructure and mechanical properties of wire-arc directed energy deposition (DED) AZ31 magnesium alloy samples with and without arc oscillations were experimentally investigated. Samples prepared with spiral and trapezoidal oscillation modes showed finer equiaxed grains and improved mechanical strength compared to samples without arc oscillation. The mechanism of improvement in wire-arc DED components was discussed based on the influence of arc oscillation on CMT wire-arc DED melt flow.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Chemistry, Physical
Tianyuan Shen, Huan Liu, Jialong Zhang, Min Ma, Zhiqiang Wu, Longfei Liu, Liwei Lu
Summary: The improvement of multi cross-rolling on the anisotropy of mechanical properties, microstructure and texture of AZ31 Mg alloys was investigated. The ultimate tensile strength of the samples after 0° direction rolling increased from 236 MPa to 338 MPa on the transverse direction (TD) compared to as-rolled samples. The enhanced mechanical properties are attributed to fine-grained strengthening, twin strengthening and dislocation strengthening caused by cross-rolling.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Green & Sustainable Science & Technology
Jianzhao Wu, Chaoyong Zhang, Kunlei Lian, Huajun Cao, Congbo Li
Summary: This study analyzes the carbon emission characteristics and proportions of laser, arc, and laser-arc hybrid welding methods. The experimental results show that appropriate welding heat inputs can reduce carbon emissions while maintaining desired tensile properties.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Materials Science, Coatings & Films
Y. Zhang, Y. J. Guo, J. Y. Dai, L. Zhao, L. P. Wu
Summary: A hazenite coating was developed on AZ31 Mg alloy using an immersion method, and the formation mechanism was investigated through the analysis of coating morphology, structure, and composition. The results showed that the coating consisted of two layers, which greatly reduced the corrosion rate of the AZ31 Mg alloy substrate.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Chao Meng, Juntao Yang, Zhengqiang Zhang, Jianlin Yang, Weibin Zhuang, Xuelei Wang, Xin Ren, Shizhen Bai, Yongheng Jiang
Summary: The study showed that laser bionic treatment can effectively improve the mechanical properties of TIG welded magnesium alloy joints by refining grain size and adjusting crystal orientations.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Optics
Huiming Li, Dianwu Zhou, Xinyu Wang
Summary: Oscillating laser welding was used to join AZ31B magnesium alloy and DP590 dual-phase steel in an overlap Mg-on-steel configuration with Sn foil. Numerical simulation was used to analyze the energy distribution, temperature, and flow fields within the molten pool. The effect of the oscillating laser beam on the microstructure and mechanical properties of the joints was investigated. By rotating the laser beam with the assistance of Sn foil, a sound Mg/steel dissimilar joint was obtained, and defects such as spatter and collapse were avoided. In the case of circular oscillation mode, the shear force of the joint was significantly improved compared to the non-oscillation mode. The uniformity of laser energy distribution was improved, and the joint width increased due to the oscillation of the laser beam.
OPTICS AND LASER TECHNOLOGY
(2023)
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
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)