2xxx系铝合金第二相对搅拌摩擦焊接头腐蚀行为的影响

钟嘉欣, 关蕾, 李雨, 黄家勇, 石磊

Effect of Second Phase on Corrosion Behavior of Friction-stir-welded Joints of 2xxx Series Al-alloy

ZHONG Jiaxin, GUAN Lei, LI Yu, HUANG Jiayong, SHI Lei

表3 提高2xxx系铝合金搅拌摩擦焊接头耐腐蚀性的方法总结

Table 3 Summary of methods employed to improve the corrosion resistance of FSWed joints of 2xxx series aluminum alloy

Methor Al-alloy Result Reference Reduce heat input during welding Reduce the welding speed 2024-T4 The second-phase particles were dissolved and became smaller in size with segregation of the Cu elements at the grain boundary decreased [41] Reduce the rotational speed 2219-T87 - [42] Water cooling 2219-T62, 2014 θ(Al2Cu) phase was refined and the PFZ region was absent [39, 43] Post welding heat treatment artificial ageing of 8 and 9 h 2014-T6 - [44] Surface treatment Surface coating 2024-T351, 2219-T87 The grain had refined and the residual stress had reduced [45, 46] Laser shock peening 2024-T351 The grain had refined, the phase had increased and the high density dislocation appeared [47] ultrasonic impact treatment 2A12 [48] 2219-T6 The grain had refined,the precipitated phase had dissolved [49] laser surface melting 2219 The surface S phase had dissolved and the second phase was uniformly distributed [50] in situ shot-peening-assisted cold spray coating Coated porosity had reduced [51]