金属加工（热加工）Issue(12)：52-56,61,6.
铝合金激光填丝焊对接接头疲劳性能分析
Fatigue performance analysis of butt joints of aluminum alloy laser filler welding
摘要
Abstract
For the 3mm thick 6082-T6 aluminum alloy sheet used in the body of the 350 km/h Fuxing EMU,the laser filler wire welding process test of butt joint was carried out with 5087 welding wire,and the fatigue performance test of the test plate was carried out.By studying the macro and micro morphology of the fracture surface of the test plate,the fracture features of the fracture surface were analyzed.The results show that when the number of cycles is 1 × 107(specified life),the median fatigue limit σ0.1 of the butt joint of 6082-T6 aluminum alloy with 3mm penetration depth is 87.5MPa;The fatigue specimens are basically fractured in the welding heat affected zone of the base metal,and the fatigue lines of the fractured specimens are clear,which are clearly visible in the crack initiation zone and the crack propagation zone,and at the same time show the iconic fracture features.When the number of cycles gradually increases,the range of the propagation zone is gradually expanded,and the fracture morphology of the final fracture zone is dimple-shaped.The test results provide technical help for the application of laser filler wire welding in long and large parts of aluminum alloy car body.关键词
激光填丝焊/疲劳极限/焊接热影响区/韧窝/断裂Key words
laser filling welding/fatigue limit/heat affected zone/dimple/fracture引用本文复制引用
王喜君,郁志凯,熊磊,吕洪涛..铝合金激光填丝焊对接接头疲劳性能分析[J].金属加工（热加工）,2025,(12):52-56,61,6.基金项目
国家重点研发项目计划(2016YFB1102100). （2016YFB1102100）
