Article
Nanoscience & Nanotechnology
Lei Shi, Xiang Dai, Chunyan Tian, Chuansong Wu
Summary: A novel splat cooling assisted friction stir welding (SCaFSW) was proposed to achieve high-strength joints of 2195 Al-Li alloy. The use of splat cooling in friction stir welding reduced the welding temperature and fluidity of the plastic materials, resulting in a rough weld surface and even the formation of void defects. Compared to conventional FSW, the SCaFSW joint had finer grain size and higher dislocation density in the weld nugget zone. Splat cooling suppressed the dissolution of precipitates into the matrix and resulted in coarse residual precipitates in the weld nugget zone of SCaFSW joints. Additionally, splat cooling significantly increased the tensile strength but decreased the elongation of defect-free 2195 Al-Li alloy joints.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Chen Peng, Chen Jing, Qin Siyi, Zou Siqi, Song Shoubo, Jiang Ting, Zhang Zhiqing, Jia Zhihong, Liu Qing
Summary: Friction stir welding was used to manufacture 7.5mm thick 2195-T8 Al-Li alloy plates, with thermal history of different regions during welding recorded and microstructure characterization conducted. Mechanical properties were measured and the correlation of temperature evolution, microstructure, and mechanical properties in various regions of the welding joints was discussed. Peak temperatures, precipitation behavior, joint softening, and fracture mechanisms were analyzed, highlighting the complexity of the welding process.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Peng Chen, Tianning Li, Xiangrui Yin, Yang Tang, Ge Liu, Shuibo Wang, Bensheng Huang, Zhiqing Zhang
Summary: The precipitate evolution of FSW 2195-O Al-Li alloy is analyzed using BSE, XRD, DSC, and TEM. The correlation between precipitates and hardness, tensile properties of FSW joints is explored. The serration shape pattern is discussed. Coarse equilibrium precipitates decrease significantly in the nugget zone, leading to a decrease in hardness and the development of a serration shape pattern.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Abhijit Sadhu, Sagar Sarkar, Angshuman Chattopadhyay, Omkar Mypati, Surjya K. Pal, Ashish Kumar Nath
Summary: The study showed that LSP treatment can enhance yield strength and fatigue life of base and FSW specimens, but has less obvious effect on surface residual stress. Additionally, the increase in low angle grain boundaries after LSP indicates an increase in substructure induced by plastic deformation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Maziar Toursangsaraki, Yongxiang Hu
Summary: This study developed a physics-based crystal plasticity finite element framework to evaluate the effects of multiple laser peening impacts on enhancing the high-cycle fatigue properties of AA2195-T6 friction stir welded joints. The findings showed that laser peening reduced the driving force for fatigue crack initiation and improved the fatigue performance of the joints by alleviating cyclic mean stress and improving the crystal organization and texture.
MATERIALS & DESIGN
(2022)
Article
Materials Science, Multidisciplinary
Peng Chen, Siqi Zou, Jing Chen, Siyi Qin, Qingbo Yang, Zhiqing Zhang, Zhihong Jia, Ling Zhang, Ting Jiang, Qing Liu
Summary: This study investigated the microstructure evolution and mechanical properties of SIZ, PIZ, and SZ regions during friction stir welding with different rotation speeds. The results showed that the grains and orientation in different regions varied, as well as the strengthening mechanisms.
MATERIALS CHARACTERIZATION
(2021)
Article
Optics
Kangmei Li, Xingzhe He, Le Li, Liuyong Yang, Jun Hu
Summary: This study investigates the effect of laser peening on the residual stress distribution in the welding zone of aluminium-lithium alloy. The optimal combination of laser peening parameters is determined through numerical simulation and experimental verification.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Automation & Control Systems
Maziar Toursangsaraki, Yongxiang Hu, Tianyang Zhang
Summary: This study used experimental methods and a physics-based crystal plasticity finite element method to quantify the strengthening contributions of microstructural evolutions induced by laser peening on the tensile properties of friction stir welded joints. The results of the study predicted the enhancing effects of near-surface compressive residual stresses, work hardening, and crystal morphology evolutions after laser peening application on the joint center. The study also observed the local and overall evolutions in joint tensile properties and evaluated the modeling results using the digital image correlation method.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Jiaxin Chen, Hongfei Liao, Rong Chen, Ye Tian, Zhiqing Zhang, Shifeng Liu, Shoubo Song
Summary: Reasonable welding speeds are essential for achieving high-quality joints by friction stir welding. This study investigated the effects of welding speed on the microstructure and mechanical properties of 2195-T8 Al-Li alloy FSW joints. Various characterization techniques, including OM, SEM, EBSD, and TEM, were employed to analyze the microstructural features. Hardness and tensile tests were conducted to evaluate the mechanical properties. The results indicated that the welding speed influenced the formation of precipitates, grain structure, and the occurrence of defects in the joints.
Article
Materials Science, Multidisciplinary
Akbar Heidarzadeh, Roghayeh Mohammadzadeh, Mohamed Ahmed, Yutao Pei
Summary: Friction stir processing (FSP) has been used to process Monel alloy, resulting in refined grain structure and improved mechanical properties. The stir zone (SZ) exhibits significantly refined grains with a high fraction of high-angle grain boundaries (HAGBs), leading to increased yield strength and ultimate tensile strength.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Nan Xu, Zike Ren, Zhengda Lu, Jun Shen, Qining Song, Jianhua Zhao, Yefeng Bao
Summary: Friction stir welding (FSW) is a commonly used technology for joining low melting point metals or alloys. In this study, large-load and low-speed FSW was used to improve the welding efficiency of an AZ61 Mg alloy, resulting in an ultrafine grain structure and enhanced strength and ductility of the welded joint.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Rasoul Khajeh, Hamid Reza Jafarian, Seyed Hossein Seyedein, Reza Jabraeili, Ali Reza Eivani, Nokeun Park, Yejin Kim, Akbar Heidarzadeh
Summary: The study investigated the effect of FSW parameters on the properties of 2024 aluminum alloy and copper joints, finding that the W/V ratio plays a significant role in determining the joints' characteristics. Optimal FSW conditions led to higher strength and ductility, as well as lower electrical resistivity.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Chengmin Deng, Caimei Wang, Feifan Wang, Baoyong Song, Hua Zhang
Summary: This study examined the microstructure and corrosion behavior of 2195-T8 aluminum-lithium alloy friction stir welding (FSW) joint using microscopy and salt spray corrosion tests. The research found that the corrosion rate was affected by pH values and spraying time, showing a decrease with increasing pH and a complex relationship with spraying time. Additionally, a new empirical relationship was established to predict the corrosion rate of the FSW joints.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
R. Selvabharathi, A. Thamarai Selvan
Summary: This investigation examined the microstructure and mechanical properties of severe double side shot peened and Plasma Spray FeCr18Ni10Mo3 filler coated Super Austenite Stainless Steel in laser welding, revealing improved corrosion resistance and tensile properties.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Review
Chemistry, Physical
Virendra Pratap Singh, Surendra Kumar Patel, Basil Kuriachen
Summary: Friction stir welding (FSW) can control the microstructure and microchemistry of weld joints through cooling assisted techniques, leading to improved efficiency and performance. This is especially significant in dissimilar material joining scenarios.
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)