Abstract Atmospheric stress corrosion cracking (SCC) tests were conducted for a 316 L stainless steel (SS) at an applied stress of 1.1 σ0.2 with a chloride deposition density of approximately 100 μg/cm2 deposited as MgCl2 from solution. The test specimens were exposed in an atmospheric chamber at a constant temperature of 40 °C with initial relative humidity (RH) of 40 %, followed by an increase to 60 % RH, then 80 % RH, and finally a decrease to 60 % RH. The total exposure period was 6500 h (about 9 months). The stress corrosion crack growth rate decreased with increasing RH and with increasing crack depth.

中文翻译：

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核废料安全壳用316L不锈钢大气应力腐蚀裂纹扩展速率

摘要 对 316 L 不锈钢 (SS) 进行了大气应力腐蚀开裂 (SCC) 测试，施加​​的应力为 1.1 σ0.2，氯化物沉积密度约为 100 μg/cm2，从溶液中沉积为 MgCl2。将试样暴露在恒温 40 °C 的大气室中，初始相对湿度 (RH) 为 40 %，然后增加到 60 % RH，然后是 80 % RH，最后降低到 60 % RH . 总暴露时间为 6500 小时（约 9 个月）。应力腐蚀裂纹扩展速率随着相对湿度的增加和裂纹深度的增加而降低。