宇航材料工艺2012，Vol.42Issue(6)：70-75,91,7.
2219铝合金双轴肩搅拌摩擦焊接头组织与性能分析
Microstructure and Mechanical Properties of Self-Reacting Friction Stir Welding of 2219 Aluminium Alloy
赵衍华 1李延民 1郝云飞 1陈玉耘 1王国庆2
作者信息
- 1. 首都航天机械公司,北京100076
- 2. 中国运载火箭技术研究院,北京100076
- 折叠
摘要
Abstract
An extensive investigation was carried out on the SR-FSW of 2219aluminium alloy with the thickness of 6 mm, and the weld appearances, microstructure and mechanical properties of the SR-FSW joint has been analyzed. The results indicated that the SR-FSW joint had excellent top and underside appearances without inner defects, distortion and seam thinning if the parameters were carefully chosen. Typical macrosections of the joint were slightly hourglass shpaed,and the width of the top and underside surface was slightly greater than the mid-thickness of the joint. As analyzed, the macrosection of the joint was related with the change of the SRPT, heat production and heat trasfer. The microslructure of the joint also consisted of nugget zone, thermal-mechanically affected zone, heat affected zone, and within each zone, the microstructure was the same as C-FSW joint. The SR-FSW joint and C-FSW joint had the similar hardness distribution with the typical "W" type, but the former had no anisotropic. The mechanical property shown that the tensile strength of the joint can reach 318. 3 MPa, and the ductility can get to 5. 5%. The fracture mechanisium of the joint was ductile fracture.关键词
双轴肩搅拌摩擦焊/2219铝合金/组织形态/力学性能Key words
Self-reacting friction stir welding/2219 aluminium alloy/Microstructure/Mechanical property引用本文复制引用
赵衍华,李延民,郝云飞,陈玉耘,王国庆..2219铝合金双轴肩搅拌摩擦焊接头组织与性能分析[J].宇航材料工艺,2012,42(6):70-75,91,7.
