电焊机2012，Vol.42Issue(7)：86-89,4.
7050铝合金搅拌摩擦焊接头微观组织及力学性能分析
Microstructure and mechanical properties analysis of welding joint 7050 Aluminum alloy in friction stir welding
姜玉恒 1刘金合 1周卫涛1
作者信息
- 1. 西北工业大学材料学院,陕西西安 710072
- 折叠
摘要
Abstract
The butt joints of 7050 aluminum alloy plates with thickness of 12 mm were obtained by friction stir welding with optimizal parameters,and the microstructure and Mechanical properties of the joints were analyzed.The results indicate that weld nugget zone is the formation of small equiaxial recrystallization organization.Thermo-mechanically affected zone with machine and hot dual role organization has undergone great degree of distortion,under the action of thermal cycle,happened reply response.Heat affected zone only the function of the heat cycle,coarse grains were found in heat affected zone.Meehanics test shows that the rotation speed is 400 r/min,welding speed is 180 nrWmin,joint tensile strength can reach 391 MPa,the 77% of mother material and the Welding speed is 200 mm/min,rotation speed is 450 r/min Joint tensile strength can reach 376 MPa,the 74% of the mother materials.The fracture morphology analysis show joint fracture mode is wear crystal and the intergranular mixed fiacture.关键词
搅拌摩擦焊/7050铝合金/微观组织/力学性能/断口形貌Key words
friction stir welding/7050 aluminum alloy/microstructure/mechanical properties/fracture morphology分类
矿业与冶金引用本文复制引用
姜玉恒,刘金合,周卫涛..7050铝合金搅拌摩擦焊接头微观组织及力学性能分析[J].电焊机,2012,42(7):86-89,4.
