Influencing mechanism of pre-existing nanoscale Al5Fe2 phase on Mg-Fe interface in friction stir spot welded Al-free ZK60-Q235 joint

doi:10.1016/j.jmst.2019.12.003

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	Influencing mechanism of pre-existing nanoscale Al5Fe2 phase on Mg-Fe interface in friction stir spot welded Al-free ZK60-Q235 joint
	Xu, R. Z.1,4; Yang, Q.2,3; Ni, D. R.4; Xiao, B. L.4; Liu, C. Z.1; Ma, Z. Y.4
刊名	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
	2020-04-01
卷号	42 页码:220-228
关键词	Dissimilar welding Friction stir spot welding Magnesium alloys Steels Zinc coating
ISSN号	1005-0302
DOI	10.1016/j.jmst.2019.12.003
通讯作者	Ma, Z. Y.(zyma@imr.ac.cn)
英文摘要	Al-free ZK60 magnesium (Mg) alloy sheet was selected as substrate material of Mg-steel pinless friction stir spot welding (FSSW), avoiding the effect of the Al element in the substrate on the alloying reaction of Mg-iron (Fe) interface. The sound FSSW joint of ZK60 Mg alloy and Q235 steel with a hot-dipped aluminum (Al)-containing zinc (Zn) coating was successfully realized. The detailed microstructural examinations proved that Al5Fe2 phase at the Mg-Fe interface came from the pre-existing Al5Fe2 phase in the coating and acted as the transition layer for promoting the metallurgical bonding of Mg and Fe. The interfaces with well-matched lattice sites among Fe, Al5Fe2 and Mg were formed during FSSW. A low energy interface with good match of lattice sites ((002)(Al5Fe2)//(110)(Fe), [110](Al5Fe2)//[(1) over bar 13](Fe)) between Al5Fe2 and Fe was identified. For the interface between Al(5)Fe(2)and Mg, an orientation relationship of (6 (2) over bar2)(Al5Fe2)//(3 (112) over bar)(Mg) and[1 (58) over bar](Al5Fe2)//[2 (4) over bar 23] (Mg) was observed. The tensile-shear load of the ZK60-steel joint could reach 4.6 kN. Moreover, the joint fracture occurred at the interface between the Al5Fe2 layer and the Mg alloy substrate, suggesting the brittle fracture characteristic. (C) 2020 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[51601121] ; National Natural Science Foundation of China[51371179] ; National Natural Science Foundation of China[51331008] ; Department of Energy Basic Energy Sciences[DEFG02-01ER45923]
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:000545647700023
资助机构	National Natural Science Foundation of China ; Department of Energy Basic Energy Sciences
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/139782]
专题	金属研究所_中国科学院金属研究所
通讯作者	Ma, Z. Y.
作者单位	1.Shenyang Aerosp Univ, Coll Mat Sci & Engn, Shenyang 110136, Peoples R China 2.Univ Illinois, Dept Mat Sci & Engn, 1304 W Green St, Urbana, IL 61801 USA 3.Univ Illinois, Fredrick Seitz Mat Res Lab, 104 S Goodwin Ave, Urbana, IL 61801 USA 4.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Xu, R. Z.,Yang, Q.,Ni, D. R.,et al. Influencing mechanism of pre-existing nanoscale Al5Fe2 phase on Mg-Fe interface in friction stir spot welded Al-free ZK60-Q235 joint[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2020,42:220-228.
APA	Xu, R. Z.,Yang, Q.,Ni, D. R.,Xiao, B. L.,Liu, C. Z.,&Ma, Z. Y..(2020).Influencing mechanism of pre-existing nanoscale Al5Fe2 phase on Mg-Fe interface in friction stir spot welded Al-free ZK60-Q235 joint.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,42,220-228.
MLA	Xu, R. Z.,et al."Influencing mechanism of pre-existing nanoscale Al5Fe2 phase on Mg-Fe interface in friction stir spot welded Al-free ZK60-Q235 joint".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 42(2020):220-228.