Abstract The influence of aqua blasting and laser engraving on the atmospheric chloride-induced stress corrosion cracking (AISCC) resistance of type 316 L stainless steel has been elucidated by using MgCl 2 -laden droplet deposits as the test medium. Aqua blasted surfaces showed no evidence of AISCC. Laser engraving resulted in tensile residual stresses, and led to AISCC within two weeks of exposure, with crack growth rates similar to U-bend samples. Introducing compressive residual stresses via peening inhibited crack nucleation, whereas oxide layer removal of engraved surfaces had no effect on AISCC. Strategies to reduce the likelihood of AISCC of laser engraved components are discussed.

中文翻译：

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激光雕刻316L不锈钢的大气氯化物应力腐蚀开裂

摘要 以含MgCl 2 的液滴沉积物为试验介质，阐明了喷水和激光雕刻对316 L型不锈钢耐大气氯化物应力腐蚀开裂（AISCC）性能的影响。Aqua 喷砂表面没有显示 AISCC 的证据。激光雕刻导致拉伸残余应力，并在暴露两周内导致 AISCC，裂纹扩展速率与 U 型弯曲样品相似。通过喷丸引入压缩残余应力抑制裂纹成核，而雕刻表面的氧化层去除对 AISCC 没有影响。讨论了降低激光雕刻组件 AISCC 可能性的策略。