Microstructure-property characteristics of a novel non-weld-thinning friction stir welding process of aluminum alloys

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	Microstructure-property characteristics of a novel non-weld-thinning friction stir welding process of aluminum alloys
	Zhang HJ(张会杰); Wang M(王敏); Zhou WJ(周维佳); Zhang X(张骁); Zhu Z(朱智); Yu T(于涛); Yang GX(杨广新)
刊名	Materials & Design
	2015
卷号	86 页码:379-387
关键词	Non-weld-thinning friction stir welding Aluminum alloy Microstructure characteristic Mechanical property
ISSN号	0264-1275
通讯作者	周维佳
产权排序	1
中文摘要	The weld thinning phenomenon occurring in conventional friction stir welding (C-FSW) has negative effects on the formation quality and serviceable reliability of FSW joints. The existing methods for solving the weld thinning problem in FSW exhibit some universal deficiencies, such as low efficiency, low quality and narrow applicable range. Motivated by this challenge, a novel non-weld-thinning (NWT) FSW process, during which a zero shoulder plunge depth is applied to the welding tool, is proposed and investigated in the present paper. The results indicate that the high quality NWT-FSW joints can be efficiently produced by using this novel process. Microstructural analysis implies that the grains in weld nugget of NWT-FSW joints present smaller size and a more uniformly distributed feature than those of C-FSW joints. Compared with the C-FSW joints, the NWT-FSW joints are characterized by narrower softening regions and higher minimum hardness values, leading to an increase in tensile strength during tensile test. The temperature history analysis suggests that the thermal effect of tool shoulder is effectively controlled during NWT-FSW due to the application of zero shoulder plunge depth, which is the intrinsic reason for the grain refinement and strength improvement of NWT-FSW joints. © 2015.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Materials Science, Multidisciplinary
研究领域[WOS]	Materials Science
关键词[WOS]	MECHANICAL-PROPERTIES ; RESIDUAL-STRESS ; TOOL ; JOINTS ; PARAMETERS ; FLOW
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000362862700049
内容类型	期刊论文
源URL	[http://ir.sia.cn/handle/173321/17119]
专题	沈阳自动化研究所_空间自动化技术研究室
推荐引用方式 GB/T 7714	Zhang HJ,Wang M,Zhou WJ,et al. Microstructure-property characteristics of a novel non-weld-thinning friction stir welding process of aluminum alloys[J]. Materials & Design,2015,86:379-387.
APA	Zhang HJ.,Wang M.,Zhou WJ.,Zhang X.,Zhu Z.,...&Yang GX.(2015).Microstructure-property characteristics of a novel non-weld-thinning friction stir welding process of aluminum alloys.Materials & Design,86,379-387.
MLA	Zhang HJ,et al."Microstructure-property characteristics of a novel non-weld-thinning friction stir welding process of aluminum alloys".Materials & Design 86(2015):379-387.