Improvement in toughness and ductility of friction stir welded medium-Mn steel joint via post-welding annealing

doi:10.1016/j.jmatprotec.2022.117621

IMR OpenIR

	Improvement in toughness and ductility of friction stir welded medium-Mn steel joint via post-welding annealing
	Wang, Y. Q.1; Duan, R. H.1; Hu, J.1; Luo, Z. A.1; Ma, Z. Y.2; Xie, G. M.1
通讯作者	Xie, G. M.(xiegm@ral.neu.edu.cn)
	2022-08-01
发表期刊	JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
ISSN	0924-0136
卷号	306 页码:12
摘要	The medium-Mn steels have a great application potential in the engineering fields due to its excellent strength and toughness. However, the presence of coarse martensite and segregation of Mn in the fusion-welded mediumMn steel joint severely deteriorated toughness and ductility. In this work, 6 mm thick medium-Mn steel plates were joined by friction stir welding, and then were intercritically annealed to enhance the toughness and ductility of the joint. The as-welded nugget zone (NZ) contained lath martensite with low proportion of high angle boundaries (HABs), leading to the joint with lower elongation of 22.5% and the impact energy of 73.6 J/cm(2). However, the as-annealed NZ consisted of ferrite and austenite because partial martensite changed to reversed austenite, while other martensite became ferrite during annealing. In addition, the proportion of HABs in the as-annealed NZ increased obviously. In comparison with as-welded joint, the impact energy and elongation of the as-annealed joint was increased by 70.7% and 44.4%, respectively. The abovementioned excellent mechanical properties were attributed to the high proportion of HABs and a large amount of ultra-fine reversed austenite with high thermal and mechanical stability, which provided a significant transformation induced plasticity effect, obviously inhibiting crack initiation and propagation. This systematic work provided a reference for welding similar materials containing retained austenite.
关键词	Friction stir welding Medium-Mn steel Intercritical annealing Reversed austenite
资助者	National Nature Science Foundation of China ; Liaoning Province Excellent Youth Foundation ; Open Research Fund from the State Key Laboratory of Rolling and Automation, Northeastern University
DOI	10.1016/j.jmatprotec.2022.117621
收录类别	SCI
语种	英语
资助项目	National Nature Science Foundation of China[51774085] ; Liaoning Province Excellent Youth Foundation[2020-YQ-03] ; Open Research Fund from the State Key Laboratory of Rolling and Automation, Northeastern University[2020RALKFKT009]
WOS研究方向	Engineering ; Materials Science
WOS类目	Engineering, Industrial ; Engineering, Manufacturing ; Materials Science, Multidisciplinary
WOS记录号	WOS:000805771700002
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：12[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/174093
专题	中国科学院金属研究所
通讯作者	Xie, G. M.
作者单位	1.Northeastern Univ, State Key Lab Rolling & Automat, 3 Wenhua Rd, Shenyang 110819, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shi changxu Innovat Ctr Adv Mat, 72 Wenhua Rd, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Wang, Y. Q.,Duan, R. H.,Hu, J.,et al. Improvement in toughness and ductility of friction stir welded medium-Mn steel joint via post-welding annealing[J]. JOURNAL OF MATERIALS PROCESSING TECHNOLOGY,2022,306:12.
APA	Wang, Y. Q.,Duan, R. H.,Hu, J.,Luo, Z. A.,Ma, Z. Y.,&Xie, G. M..(2022).Improvement in toughness and ductility of friction stir welded medium-Mn steel joint via post-welding annealing.JOURNAL OF MATERIALS PROCESSING TECHNOLOGY,306,12.
MLA	Wang, Y. Q.,et al."Improvement in toughness and ductility of friction stir welded medium-Mn steel joint via post-welding annealing".JOURNAL OF MATERIALS PROCESSING TECHNOLOGY 306(2022):12.