摘要
电子束焊接能量对TC4钛合金焊缝力学性能具有一定的影响。随着电子束焊接次数的增加,焊缝能量输入增加,焊接残余拉应力逐渐增大,焊缝拉伸性能和断裂延伸率降低;当焊接次数达到6次时,拉伸强度为927MPa,低于母材强度的90%,无法满足GJB1718A-2005 I级标准要求;当焊接次数达到4次时,焊缝断裂伸长率低于10%。
Electron beam welding energy influ- ences the TC4 titanium alloy welds mechanical properties. With the increase of the number of electron beam weld- ing. welding energy input increases, weld residual stress increases, tensile strength and fracture elongation reduces . When the welding number reaches 6 times, the strength is 927MPa, less than 90% of the base material strength , could not meet the GJBI718A-2005 I grade standards . When the welding number reaches 4 times, weld fracture elongation is less than 10%.
出处
《航空制造技术》
2015年第17期90-92,共3页
Aeronautical Manufacturing Technology
关键词
钛合金
电子束
力学性能
应力
Titanium alloy Electron beam weld-ing Mechanical properties Stress
