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
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
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
A. Saravana Sundar, Adepu Kumar, Krishna Kishore Mugada
Summary: A novel in-house friction stir welding (FSW) tool that can act as both static shoulder and rotating shoulder was developed. The microstructural and textural aspects of two different welding methods were compared, revealing significant differences between them.
Article
Nanoscience & Nanotechnology
Zhirou Zhang, Qinghuan Huo, Zhenyu Xiao, Yuxiu Zhang, Aki Hashimoto, Xuyue Yang
Summary: The study proposed a practical method for optimizing the mechanical properties of Mg-4Y-2Nd-0.2Zn-0.5Zr alloy by combining interrupted compression with intermediate annealing, resulting in the formation of deformation bands triggered by the intermediate annealing and a higher volume fraction of ultra-fine grains in the final IC sample compared to the CC sample.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Yuxuan Li, Guangda Sun, Zili Zhang, Li Zhou, Ning Guo, Qiang Meng, Jihong Dong, Huaxia Zhao
Summary: Electron backscatter diffraction (EBSD) was used to investigate the microstructure and texture evolution of 2A12-T42 aluminum alloy during refill friction stir spot welding (refill FSSW). The study found that dynamic recrystallization occurred in the stir zone (SZ) and the thermo-mechanically affected zone (TMAZ), leading to typical shear texture components. The dominant texture components varied in different regions, influenced by the welding parameters and the degree of recrystallization. The effect of texture strengthening on the mechanical properties of the joints was limited, with less than 10% variation observed.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Qi Sun, Xuesong Fu, Guoqing Chen, Honggang Dong, Wenlong Zhou
Summary: The performance of friction stir welded (FSW) Mg joints can be improved by controlling the microstructure and texture distribution in the joints. The use of lower rotation rate-higher welding speed and extra heat input can result in better joint performance, including more stable mechanical properties and elongation close to that of the base material. This is attributed to the reduced texture near the nugget zone, leading to decreased Schmid factor (SF) values of basal slip and extension twinning.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Nanoscience & Nanotechnology
A. M. Jamili, A. Zarei-Hanzaki, H. R. Abedi, P. Minarik
Summary: The study investigated the effect of mechanical post-treatment on the microstructure and texture evolution of a magnesium alloy, showing that friction stir processing plus compression loading is an effective method for fabricating micro-scale functionally graded materials.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
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
Nanoscience & Nanotechnology
Nan Xu, Ruo-Nan Feng, Qi-Ning Song, Jian-Hua Zhao, Ye-Feng Bao
Summary: Low-temperature friction stir processing was utilized to modify the microstructure and mechanical properties of die-cast AZ91D Mg alloy, resulting in the formation of a fine-grained structure and various strengthening mechanisms. This approach effectively increased the strength and ductility of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Foroozan Yousefpour, Roohollah Jamaati, Hamed Jamshidi Aval
Summary: In this study, the effects of traverse and rotational speeds in friction stir processing (FSP) were investigated on the microstructural evolution, crystallographic texture, and mechanical properties of AZ91 alloy. It was found that by adjusting the tool parameters, the grain size, grain boundaries, and mechanical properties could be significantly influenced. Overall, the combination of tool traverse and rotational speeds led to changes in grain size, beta-Mg17Al12 fraction, texture, hardness, ultimate tensile strength, total elongation, and energy absorption of the FSP-processed AZ91 alloy samples.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
X. C. Liu, Q. Wang, X. J. Pei, Y. Z. Li, Y. Q. Zhen, Z. K. Shen, H. Y. Chen
Summary: The microstructural evolution of 6061-T6 aluminum alloy in VFSW process was studied. The heat affected zone (HAZ) was found to be the weakest zone due to precipitate coarsening and heat softening. Continuous dynamic recrystallization occurred in the weld nugget zone (WNZ), but it was insufficient because of the self-adapting plastic deformation in VFSW. Solid solution strengthening occurred in the WNZ due to precipitate dissolution, resulting in higher microhardness than in the HAZ.
MATERIALS CHARACTERIZATION
(2023)
Article
Nanoscience & Nanotechnology
Yanying Hu, Yitian Niu, Yunqiang Zhao, Weiqi Yang, Xianfeng Ma, Jinglong Li
Summary: This study systematically investigated the DRX, deformation-induced mechanical twins, and strengthening mechanism of CoCrNi equi-atomic MEA welded by FSW. The results showed that FSW led to grain refinement and improved the hardness and mechanical properties of the stir zones. The study also revealed the mechanism of strength-ductility synergy achieved by FSW under low heat input conditions.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Nan Xu, Zhonghao Qiu, Zike Ren, Dan Wang, Jun Shen, Qining Song, Jianhua Zhao, Yefeng Bao
Summary: In this study, commercially cold-rolled ultralight Mg-14Li-1Al (LA141) alloy plates were successfully joined using friction stir welding (FSW). By adjusting the welding parameters, connections with different sizes and strengths can be obtained. The results showed that using a cemented carbide tool under low heat input conditions can produce high-quality joints, achieving grain refinement and alloy strengthening to improve the strength and performance of the joints.
MATERIALS CHARACTERIZATION
(2022)
Article
Engineering, Manufacturing
Fujun Cao, Guoqiang Huang, Wei Guan, Wentao Hou, Ruiyang Ni, Yifu Shen, Qijun Liu
Summary: The study investigated the microstructural inhomogeneity along the thickness of the FSW joint and its impact on mechanical properties and corrosion resistance. It was found that temperature gradient and heterogeneous grain size and misorientation distributions existed in the SZ. The longitudinal tensile specimens from the middle part of the joint exhibited a good combination of strength and ductility due to a balanced microstructure with reasonable grain size.
JOURNAL OF MANUFACTURING PROCESSES
(2022)
Article
Materials Science, Multidisciplinary
Wei-An Wang, Xiao-Ya Li, Yun-Fei Xing, Ming Gu, Long-Hui Fang, Ye-Feng Bao, Jin-Hui Fan
Summary: The study developed a Sn/Ni-Sn/Sn sandwich joining piece for fabricating segmented half-Heusler/skutterudite thermoelectric joints, showing that the piece effectively and flexibly bonds materials for the preparation of segmented thermoelectric devices.
Article
Materials Science, Multidisciplinary
Ke-Zhao Zhang, Zheng-Long Lei, Yan-Bin Chen, Ke Yang, Ye-Feng Bao
Summary: The study investigated the influence of heat input on the microstructural evolution of laser-welded Ti2AlNb joints, showing that higher heat input induced phase transformations and faster cooling rates in the heat affected zone. Finite element modeling was used to simulate the thermal cycles during the welding process.
Article
Materials Science, Coatings & Films
Bing-qi Xie, Ye-feng Bao, Chong-hui Zhong, Qi-ning Song, Ke Yang, Yong-feng Jiang
Summary: The cavitation erosion resistance of high-entropy FeCoCrNiMoXB0.2 coatings cladded by laser was studied using a magnetostrictive cavitation method in both distilled water and NaCl solution. The increase in Mo content improved the hardness and stability of the coatings, thus enhancing cavitation erosion resistance. The presence of additional Cl- had a detrimental effect on the cavitation erosion performance, leading to increased mass loss in NaCl solution compared to distilled water.
SURFACE ENGINEERING
(2021)
Article
Nanoscience & Nanotechnology
Nan Xu, Ruo-Nan Feng, Qi-Ning Song, Jian-Hua Zhao, Ye-Feng Bao
Summary: Low-temperature friction stir processing was utilized to modify the microstructure and mechanical properties of die-cast AZ91D Mg alloy, resulting in the formation of a fine-grained structure and various strengthening mechanisms. This approach effectively increased the strength and ductility of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Metallurgy & Metallurgical Engineering
Q. N. Song, Y. Tong, H. L. Li, H. N. Zhang, N. Xu, G. Y. Zhang, Y. F. Bao, W. Liu, Z. G. Liu, Y. X. Qiao
Summary: The study revealed that laser surface melting treatment significantly improved the corrosion resistance and cavitation erosion resistance of cast Ni-Al bronze in marine environments. LSM NAB exhibited a more uniform microstructure and a more protective surface film, leading to a significant reduction in corrosion rate. Mechanical impact effect was identified as the primary cause of damage during cavitation erosion.
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Kezhao Zhang, Dong Liu, Jiameng Cai, Yanhua Zhou, Hongzhi Niu, Chunyan Yan, Yefeng Bao
Summary: The influence of laser offsets on the composition, microstructure, and tensile properties of laser welded Ti-3Al-6Mo-2Fe-2Zr and TA15 dissimilar joints was investigated. Numerical simulation was used to extensively discuss the microstructure evolution in the HAZ, revealing that different laser offsets led to variations in the microstructure of the fusion zone.
MATERIALS CHARACTERIZATION
(2021)
Article
Metallurgy & Metallurgical Engineering
Nan Xu, Lei Chen, Bo-kun Gu, Zi-ke Ren, Qi-ning Song, Ye-feng Bao
Summary: By investigating the microstructure and mechanical properties of alpha-brass plates joined with conventional friction stir welding and rapid cooling friction stir welding using liquid CO2 cooling, it was found that the latter method significantly increased the yield strength and ultimate tensile strength of the welds by creating a heterogeneous grain structure with massive dislocations and nano twins. This enhancement was attributed to grain boundary strengthening, dislocation strengthening, and the release of stress concentration in nano twins caused by plastic deformation, leading to improved ductility.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2021)
Article
Materials Science, Multidisciplinary
Yefeng Bao, Chong Cao, Bingqi Xie, Zirui Wang, Linpo Guo, Ke Yang, Qining Song
Summary: In this study, Nb-containing duplex stainless steel was prepared using the tungsten inert-gas welding powder surfacing method and subjected to solution treatment. The results showed that Nb-containing DSS had better strength and lower plasticity compared to 2209 DSS. However, heat treatment reduced the strength and plasticity of Nb-containing DSS.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2022)
Article
Materials Science, Multidisciplinary
Bao Yefeng, Guo Linpo, Zhong Chonghui, Song Qining, Yang Ke, Jiang Yongfeng, Wang Zirui
Summary: Fe4CoCrNiB0.2Mox high-entropy alloys (HEAs) prepared by laser cladding exhibit improved wear resistance, and the hardness and wear resistance of the HEAs increase with the increase of Mo content.
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
(2022)
Article
Nanoscience & Nanotechnology
Nan Xu, Jun Shen, Dan Wang, Qi-Ning Song, Jian-Hua Zhao, Ye-Feng Bao
Summary: Pre-aging and high force friction stir processing were applied to Mg-9Al-1Zn alloy, resulting in an enhanced yield strength and improved work hardening ability and ductility in the stir zone.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Kezhao Zhang, Chaowei He, Dong Liu, Chunyan Yan, HongZhi Niu, Zhibin Yang, Yefeng Bao
Summary: This study investigates the influence of heat input during laser welding process on the microstructure and properties of beta titanium alloy joints. It was found that higher heat input exacerbates the coarsening of beta grains in the fusion zone and HAZ, resulting in decreased ultimate tensile strength of the joints.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
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
Zirui Wang, Yefeng Bao, Qining Song, Yongfeng Jiang
Summary: This study investigates the influence of induction treatment on the pitting corrosion resistance of non-standard low-Ni high-Mn-N duplex stainless steel (DSS) coating. The results show that induction treatment leads to an increase in the ferrite-to-austenite ratio and a decrease in the film thickness of the coating. The coating treated at 960℃ shows severely deteriorated electrochemical performance and decreased pitting corrosion resistance, while the coating treated at 1130℃ exhibits better polarization resistance.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Materials Science, Multidisciplinary
Xu Nan, Gu Bo-Kun, Fan Yue, Shen Jun, Song Qi-Ning, Zhao Jian-Hua, Bao Ye-Feng
Summary: In this study, double-pass friction stir processing (2P-FSP) was performed on an AZ31B magnesium alloy, and it was found that compared to single-pass FSP, 2P-FSP caused more severe thermal deformation, but the dynamic recrystallization process was more complete. Tensile test results showed an improved yield strength in the 2P-FSP stir zone.
MATERIALS SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Mechanical
Yefeng Bao, Chong Cao, Bingqi Xie, Qining Song, Yongfeng Jiang, Nan Xu
Summary: This paper analyzed the loading process of material during ultrasonic cavitation erosion (CE) to estimate the cavitation incubation period of duplex stainless steel (DSS). The study derived a predictive equation for the material cavitation incubation period using the local strain theory, cumulative damage theory, and Bernoulli probability model. Tensile test and ultrasonic CE test were performed on DSS, and the results showed a certain level of error between the calculated and test data.
ACTA MECHANICA SINICA
(2022)
