A7N01S-T5铝合金接头疲劳性能研究  

Research on fatigue property of A7N01S-T5 aluminum alloys

作　　者：李春广 隋显庭 云中煌 夏宁 张明月[2] 李远星[2] 陈辉[2] 

机构地区：[1]南车南京浦镇车辆有限公司,江苏南京210031 [2]西南交通大学材料科学与工程学院,四川成都610031

出　　处：《电焊机》2013年第7期72-75,共4页Electric Welding Machine

摘　　要：A7N01S-T5铝合金在现代化高速列车中应用广泛,而焊接是铝合金高速列车车体连接的最主要方式。据统计,铝合金结构件中90%的断裂是由承受重复性动载的焊接接头的疲劳破坏引起的。针对A7N01S-T5铝合金焊接接头疲劳性能进行研究,结果显示,试验所用试件中均有不同数量程度的气孔,且随着厚度的增加,气孔数量在呈上升趋势,致使厚板疲劳性能降低。A7N01 aluminum alloys have a wide application in the field of high speed train ,and welding is the main joining method to join the ＇aluminum alloys. It is noted that 90% fracture of the weld joints enduring dynamic load is the fatigue fracture. Fatigue property of the ATN01 aluminum alloy joints is investigated in this paper. The porosity is found in the weld,the porosity increased with the increase of the thickness of the joints, which caused the fatigue strength of the joints decreased.

关 键 词：A7N01S-T5铝合金 疲劳性能 S-N曲线 微观组织 

分 类 号：TG405[金属学及工艺—焊接]