异种高强铝合金间搅拌摩擦焊接头组织与性能研究

航空材料学报, 2015, 35(1): 33-38. doi: 10.11868/j.issn.1005-5053.2015.1.006

异种高强铝合金间搅拌摩擦焊接头组织与性能研究

王凡 ^1, , 房湛 ^2, , 徐琛 ^3, , 尹玉环 ^4, , 陈科 ^5,

1.上海交通大学材料科学与工程学院,上海200240;上海交通大学上海市高温材料精密成形重点实验室,上海200240

2.上海交通大学材料科学与工程学院,上海200240;上海交通大学上海市高温材料精密成形重点实验室,上海200240

3.上海交通大学材料科学与工程学院,上海200240;上海交通大学上海市高温材料精密成形重点实验室,上海200240

4.上海航天设备制造总厂,上海,200245

5.上海交通大学材料科学与工程学院,上海200240;上海交通大学上海市高温材料精密成形重点实验室,上海200240

基金项目: 上海航天技术研究院-上海交大航天先进技术联合研究中心资助项目(USCAST2012-12)

关键词：搅拌摩擦焊 , 异种材料 , 铝锂合金 , 组织结构 , 力学性能

Microstructure and Mechanical Properties of FSW Joints between Dissimilar High-strength Aluminum Alloys

Keywords： friction stir welding , dissimilar materials , Al-Li alloy , microstructure , mechanical property

通过搅拌摩擦焊接技术成功连接了两种应用于航天工业的铝合金2195-T8和2219-T87.实验中固定焊接转速,研究了焊缝组织和力学性能随焊接走速的变化关系,发现焊核区上部异种材料间有明显界面,且该界面形貌受焊接走速影响剧烈.同时在焊接速度较高时,发现一种新的搅拌摩擦焊接接头的断裂模式.此种断裂模式与焊核区上部形成的异种材料间界面形貌和冶金结合强度有关.本文探讨了其产生原因及其对接头力学性能的影响.

参考文献

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