Refill friction stir spot welding of 5083-O aluminum alloy

被引：90
作者：
Xu, Zhiwu [1 ]
Li, Zhengwei [1 ]
Ji, Shude [2 ]
Zhang, Liguo [2 ]
机构：
[1] Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin 150001, Heilongjiang, Peoples R China
[2] Shenyang Aerosp Univ, Fac Aerosp Engn, Shenyang 110136, Liaoning, Peoples R China
来源：
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2018年 / 34卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Refill friction stir spot welding; Keyhole; Secondary phases; Microhardness; Lap shear failure loada; MECHANICAL-PROPERTIES; MICROSTRUCTURE; OPTIMIZATION; SHEETS; AL; PARAMETERS; AA6181-T4; FEATURES; JOINTS;
D O I：
10.1016/j.jmst.2017.02.011
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this work, refill friction stir spot welding (RFSSW) was used to weld 2 mm-thick 5083-O alloy. The Box-Behnken experimental design was used to investigate the effect of welding parameters on the joint lap shear property. Results showed that a surface indentation of 0.3 mm effectively eliminated the welding defects. Microhardness of the stir zone (SZ) was higher than that of the base material (BM) and the hardness decreased with increasing the heat input during welding. The optimum failure load of 7.72 kN was obtained when using rotating speed of 2300 rpm, plunge depth of 2.4 mm and refilling time of 3.5 s. Three fracture modes were obtained during the lap shear test and all were affected by the hook defect. (C) 2017 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
引用
收藏
页码：878 / 885
页数：8
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