Influence of Zn interlayer addition on microstructure and mechanical properties of friction stir welded AZ31 Mg alloy

IMR OpenIR

	Influence of Zn interlayer addition on microstructure and mechanical properties of friction stir welded AZ31 Mg alloy
	Xu, R. Z.; Ni, D. R.; Yang, Q.; Liu, C. Z.; Ma, Z. Y.; zyma@imr.ac.cn
	2015
发表期刊	JOURNAL OF MATERIALS SCIENCE
ISSN	0022-2461
卷号	50 期号:12 页码:4160-4173
摘要	2.4-mm-thick AZ31 Mg alloy sheets were friction stir spot welded without and with the addition of Zn interlayers ranging from 0.04 to 0.16 mm in thickness. For the joints without Zn interlayers, although the loads of the joints could be increased by changing the end surface geometry and size of the shoulders, the small bonded area and hook defects limited further increase of joint loads. For the joints with Zn interlayers, the Zn interlayer reacted with the Mg substrate, forming a Mg-Zn brazed zone composed of complex Mg-Zn intermetallics and a thin strip of (alpha-Mg + MgZn) eutectoid structure, thereby increasing the bonded area and reducing the hook defects of joints at the same time. As a result, the maximum joint load increased from 2.7 to 5.2 kN using a 10-mm-diameter concave shoulder with a 0.12-mm-thick Zn interlayer. A thicker interlayer resulted in a significant increase in the thickness of the thin strip in the hook region, and a thinner interlayer led to the formation of more defects due to intense diffusion reactions, thereby reducing the joint loads.
部门归属	[xu, r. z. ; ni, d. r. ; yang, q. ; ma, z. y.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china ; [xu, r. z. ; liu, c. z.] shenyang aerosp univ, coll mat sci & engn, shenyang 110136, peoples r china
资助者	National R&D Program of China [2011BAE22B05]; National Natural Science Foundation of China [51371179, 51331008]
收录类别	sci
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/74921
专题	中国科学院金属研究所
通讯作者	zyma@imr.ac.cn
推荐引用方式 GB/T 7714	Xu, R. Z.,Ni, D. R.,Yang, Q.,et al. Influence of Zn interlayer addition on microstructure and mechanical properties of friction stir welded AZ31 Mg alloy[J]. JOURNAL OF MATERIALS SCIENCE,2015,50(12):4160-4173.
APA	Xu, R. Z.,Ni, D. R.,Yang, Q.,Liu, C. Z.,Ma, Z. Y.,&zyma@imr.ac.cn.(2015).Influence of Zn interlayer addition on microstructure and mechanical properties of friction stir welded AZ31 Mg alloy.JOURNAL OF MATERIALS SCIENCE,50(12),4160-4173.
MLA	Xu, R. Z.,et al."Influence of Zn interlayer addition on microstructure and mechanical properties of friction stir welded AZ31 Mg alloy".JOURNAL OF MATERIALS SCIENCE 50.12(2015):4160-4173.