Effect of pre-hole offset on the property of the joint during laser-assisted friction stir welding of dissimilar metals steel and aluminum alloys
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- 作者：Xinjiang Fei ; Xiangzhong Jin ; jxz2014@hnu.edu.cn" class="auth_mail" title="E-mail the corresponding author ; Ying Ye ; Tengfei Xiu ; Hongliang Yang
- 关键词：Friction stir welding ; Laser ; Inter-metallic compounds ; Pre-hole offset distance ; Tensile strength ; Steel and aluminum alloy
- 刊名：Materials Science & Engineering A
- 出版年：2016
- 出版时间：20 January 2016
- 年：2016
- 卷：653
- 期：Complete
- 页码：43-52
- 全文大小：3479 K
文摘
In this paper, the influence of pre-hole offset distance on the properties of the welding joint during laser-assisted friction stir welding of Q235 steel and 6061-T6 aluminum alloy was studied. The tensile strengths of the joints obtained at different pre-hole offset distances are tested and compared. SEM, EDS and an optical microscope are used to analyze the compositions of the inter-metallic compounds and the metallographic structure of the joints, respectively. Results show that the pre-hole offset distance, the thickness of the inter-metallic compounds layer and the type of the inter-metallic compounds are the key factors that affect significantly the tensile strength of the joints in laser-assisted friction stir welding of steel and aluminum alloy. The tensile strength of joints can be easily guaranteed under such conditions as a proper pre-hole offset distance is used, thin inter-metallic compounds layer and iron-abundant inter-metallic compounds are formed.