Defects and tensile properties of 6013 aluminum alloy T-joints by friction stir welding

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• 作者：Yong Zhao ; ^{yongzhao418@just.edu.cn" class="auth_mail} ; Lilong Zhou ; Qingzhao Wang ; Keng Yan ; Jiasheng Zou
• 关键词：Friction stir welding ; Aluminum alloy ; T-joint ; Defects ; Tensile property
• 刊名：Materials and Design
• 出版年：May, 2014
• 年：2014
• 卷：57
• 期：Complete
• 页码：146-155
• 全文大小：4291 K

文摘

In this paper, 6013-T4 T-joints were successfully fabricated with different welding parameters by friction stir welding in two different combination modes of skins and stringers. The distribution features and formation mechanisms of defects in T-joints were observed and analyzed. The effect of defects and welding parameters on tensile properties of T-joints was investigated. The result shows that the T-joint without tunnel defect only can be obtained with the traverse speed of 100 mm/min in this experiment, and the welding parameters influence the features and sizes of kissing bond defects. The fracture of T-joints along the shin is attributed to the kissing bond defect and the tunnel defect is the main factor affecting the tensile properties along the stringer.