首页|Microstructural evolution and deformation behavior of friction stir welded twin-induced plasticity steel

Microstructural evolution and deformation behavior of friction stir welded twin-induced plasticity steel

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The weldability of twin-induced plasticity(TWIP)steel with ultra-high strength via friction stir welding(FSW)technique was investigated,and microstructural evolution and deformation behavior of whole and micro-zones of FSW TWIP joint were studied for the first time.The results showed that the content of recrystallized grains in the stir zone(SZ)increased from 10.5％of basal material(BM)to 14.2％,and that of heat affected zone(HAZ)increased to 78.6％.The percentage of annealing twins decreased from 26.8％in BM to 11％in SZ,while increased to 35％in HAZ.Compared with the BM,the ultimate tensile strength and yield strength of the FSW joint increased to 1036 and 550 MPa,respectively,reaching 106.7％and 110.9％of BM,respectively.The elongation of the entire joint was 50.5％,which was lower than that of BM due to the nonuniform deformation during the tensile test.The engineering strain was mainly concentrated in BM and SZ and transferred to each other during the tensile test,while the engineering strain in HAZ was always the lowest.Finally,the tensile fracture occurred in the SZ.The order of ultimate tensile strength of micro-zones in the FSW joint was as follows:HAZ＞BM ≈ SZ.The order of yield strength was as follows:HAZ＞BM＞SZ.

Twin-induced plasticity steelFriction stir weldingMicrostructureMechanical propertyDeformation behavior

Ke Qiao、Kuaishe Wang、Jia Wang、Zhengyang Hao、Yating Xiang、Peng Han、Jun Cai、Qi Yang、Wen Wang

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School of Metallurgical Engineering,National and Local Joint Engineering Research Center for Functional Materials Processing,Xi'an University of Architecture and Technology,Xi'an 710055,China

Shanghai Research Institute of Materials,Shanghai 200437,China

国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金China's National Defense Science and TechnologyShaanxi Province National Science Fund for Distinguished Young Scholars陕西省重点研发计划Scientific Research Program for Youth Innovation Team Construction of Shaanxi Provincial Department of Educationhelp of KAIPLE centre for Microscopy,characterisation & Analysis

520340055222780752104383519742202021-JCJQ-JJ-01902022JC-242020ZDLGY13-0621JP058

2024

10.1016/j.jmst.2023.05.053

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.169(2)
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