【摘要】 采用十字搭接试验方法测定2050铝锂合金焊接裂纹敏感性，研究了焊丝成分变化对2050铝锂合金焊接结晶裂纹率、液化裂纹率的影响，并对焊接接头的组织形貌、断裂特征和力学性能等进行了测试和分析。研究结果表明：采用钨极氩弧焊匹配Al-Cu-Si-Ti-Sc-Ce-B系焊丝对2050铝锂合金进行焊接，获得的焊接接头结晶裂纹率K₁和液化裂纹率K₂均为0，其强度系数可达母材的70%。更多还原

【Abstract】 Welding crack susceptibility of 2050 Al-Li alloy is studied by using the cross-lap-joints method.Difference of welding wire component on the solidification crack rate and liquefied crack rates is analyzed. And the microstructure, fracture morphology, mechanical properties of the weld-joint are characterized. Results show that the solidification crack rate and liquefied crack rate of the weld-joint with Al-Cu-Si-Ti-Sc-Ce-B wire are zero, and the strength coefficient of the weld-joint reaches 0.7.更多还原