Rotating extrusion technique and its effect on quality of aluminum alloy thin-plate weldments

• Published in: Transactions of Nonferrous Metals Society of China 2010-02, Vol.20 (2), p.183-188
• Main Author: 李军 杨建国 闫德俊 张勇 方洪渊
• Format: Article
• Language: English
• Subjects: aluminum alloy; Aluminum base alloys; Distortion; Extrusion; Mechanical properties; mechanical property; Rotating; rotating extrusion; Tensile strength; thin plate; Welded joints; welding distortion; Weldments; 力学性能; 挤压工艺; 旋转装置; 残余变形; 焊接件; 焊接接头性能; 铝合金薄板
• ISSN: 1003-6326
• DOI: 10.1016/S1003-6326(09)60118-7

A new technique named rotating extrusion was proposed that uses rotating extrusion action to rectify residual distortion of aluminum alloy thin-plate weldments to improve mechanical properties of welded joints. The basic principle and device of rotating extrusion were introduced. The residual distortion and stresses in rotating extrusion weldments were compared with those in conventional weldments. The differences in microstructure and mechanical properties between conventional welded joints and rotating extrusion welded joints were investigated and analyzed in order to make clear the effect of rotating extrusion on the performance of aluminum alloy weldments. Experimental results show that rotating extrusion can enhance the hardness and tensile strength of aluminum alloy welded joints evidently. This method has also potential effect on extending the life of welded structures.