Evolution mechanisms of microstructure and mechanical properties in a friction stir welded ultrahigh-strength quenching and partitioning steel

doi:10.1016/j.jmst.2021.06.031

CORC > 金属研究所 > 中国科学院金属研究所

	Evolution mechanisms of microstructure and mechanical properties in a friction stir welded ultrahigh-strength quenching and partitioning steel
	Wang, Z. W.1,2; Zhang, J. F.2; Xie, G. M.3; Wu, L. H.2; Zhang, H.2; Xue, P.2; Ni, D. R.2; Xiao, B. L.2; Ma, Z. Y.2
刊名	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
	2022-03-10
卷号	102 页码:213-223
关键词	Ultrahigh-strength Q& P steel Friction stir welding Microstructure Mechanical property Strain hardening
ISSN号	1005-0302
DOI	10.1016/j.jmst.2021.06.031
通讯作者	Xue, P.(pxue@imr.ac.cn)
英文摘要	Ultrahigh-strength quenching and partitioning (Q&P) steels have attracted strong interests in the auto manufactory, while the comprehensive understanding in the microstructure and mechanical behavior of their welded joints is highly needed to enrich their applications. In the present work, it is designed to make an insight into these imperative conundrums. Equal strength Q&P 1180 steel joints to parent metal were successfully fabricated via friction stir welding (FSW) technique under different parameters. Apparent hardening and softening were observed in stir zone (SZ) and heat-affected zone (HAZ) respectively, whose microstructures strongly depended on the peak temperature and cooling rate during welding. The formation of fresh martensite was the main mechanism for the SZ hardening, while the decomposition of metastable phases played key roles in the microhardness drop of the HAZ. A heat source zone-isothermal phase transition layer model was proposed to clarify the impregnability of the joint strength under parameter variation. The dual-phase structure, nano-carbide particles, tempered initial martensite, and ultrafine-grained ferrite synergistically improved the strain hardening ability of the HAZ, which eventually resulted in the equal strength FSW joints. (c) 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
资助项目	National Natural Science Foundation of China[51671190] ; National Natural Science Foundation of China[51901225] ; National Natural Science Foundation of China[51774085] ; National Natural Science Foundation of China[52034005] ; Open Research Fund from the State Key Laboratory of Rolling and Automation, Northeastern University[2020RALKFKT009] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[2017236]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	JOURNAL MATER SCI TECHNOL
WOS记录号	WOS:000778426500005
资助机构	National Natural Science Foundation of China ; Open Research Fund from the State Key Laboratory of Rolling and Automation, Northeastern University ; Youth Innovation Promotion Association of the Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/172936]
专题	金属研究所_中国科学院金属研究所
通讯作者	Xue, P.
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China 3.Northeastern Univ, State Key Lab Rolling & Automat, Shenyang 110819, Peoples R China
推荐引用方式 GB/T 7714	Wang, Z. W.,Zhang, J. F.,Xie, G. M.,et al. Evolution mechanisms of microstructure and mechanical properties in a friction stir welded ultrahigh-strength quenching and partitioning steel[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2022,102:213-223.
APA	Wang, Z. W..,Zhang, J. F..,Xie, G. M..,Wu, L. H..,Zhang, H..,...&Ma, Z. Y..(2022).Evolution mechanisms of microstructure and mechanical properties in a friction stir welded ultrahigh-strength quenching and partitioning steel.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,102,213-223.
MLA	Wang, Z. W.,et al."Evolution mechanisms of microstructure and mechanical properties in a friction stir welded ultrahigh-strength quenching and partitioning steel".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 102(2022):213-223.