Abstract Corrosion fatigue crack growth of laser additively-manufactured 316L stainless steel was studied in oxygenated 288 °C water. Effects of heat treatment, crack orientation, and applied cold work were evaluated. Stress-relieved material showed higher crack growth rate than annealed material. Their difference was not significant when the loading frequency was high. When the loading frequency decreased, the effects of material conditions created by heat treatment, crack orientation and applied cold work slightly increased. Retained unrecrystallized grains in an annealed material did not affect significantly the cracking susceptibility. High-temperature recrystallization treatment of an AM 316L component may be necessary for nuclear applications.

中文翻译：

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激光增材制造316L不锈钢在高温水中腐蚀疲劳裂纹扩展

摘要 研究了激光增材制造 316L 不锈钢在 288 °C 含氧水中的腐蚀疲劳裂纹扩展。评估了热处理、裂纹取向和应用冷加工的影响。消除应力的材料比退火材料显示出更高的裂纹扩展速率。当加载频率高时，它们的差异不显着。当加载频率降低时，热处理、裂纹取向和应用冷加工所产生的材料条件的影响略有增加。退火材料中保留的未再结晶晶粒不会显着影响开裂敏感性。对于核应用，可能需要对 AM 316L 组件进行高温再结晶处理。