Process parameter influence on defects and tensile properties of friction stir welded T-joints on AA6061-T4 sheets

作者：Cui Lei; Yang Xinqi^*; Xie Yonghui; Hou Xiaopeng; Song Youbao

来源：Materials & Design, 2013, 51: 161-174.

DOI：10.1016/j.matdes.2013.04.013

• Friction stir welding
• Aluminum alloy T-joints
• Defects
• Microstructures
• Tensile behaviors

In this study, AA6061-T4 T-joints characterized by combination modes of T-lap and T-butt were fabricated by friction stir welding with different processing parameters. Defects distributed in the obtained specimens were examined by using a stereo microscope and an optical microscope. Process parameter influence on the distribution and the size of original joint line with severe deformation (OJLwSD) defect was investigated. The microstructures and hardness profiles in the T-joints were studied. Influence factors on T-joints' tensile properties were discussed. In addition, the fracture mode and the fracture surface of the failure samples were observed and discussed as well.

• 出版日期2013-10
• 单位天津大学