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); 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
产权排序1
英文摘要

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关键词MECHANICAL-PROPERTIES ; RESIDUAL-STRESS ; TOOL ; JOINTS ; PARAMETERS ; FLOW
WOS研究方向Materials Science
语种英语
WOS记录号WOS:000362862700049
资助机构Self-Determined Project for Youth of State Key Laboratory of Robotics (Y3A1209), Shenyang Institute of Automation Chinese Academy of Sciences (Y3A1209) and the National Science and Technology Major Project of China (2010ZX04007-011)
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
通讯作者Zhang X(张骁)
作者单位State Key Laboratory of Robotics, Shenyang Institute of Automation Chinese Academy of Sciences, Shenyang, China
推荐引用方式
GB/T 7714
Zhang HJ,Wang M,Zhang X,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,Zhang X,Zhu Z,Yu T,&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.
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