Pit initiation on sensitized Type 304 stainless steel under applied stress: Correlation of stress, Cr-depletion, and inclusion dissolution
Pit initiation on sensitized Type 304 stainless steel under applied stress: Correlation of stress, Cr-depletion, and inclusion dissolution
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DOI：
10.1016/j.corsci.2020.108506
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发表时间：
2020-05-01
影响因子：
8.3
通讯作者：
Hara, Nobuyoshi
中科院分区：
文献类型：
--
作者：
Tokuda, Shimpei;Muto, Izumi;Hara, Nobuyoshi
研究了外加应力对敏化304不锈钢在4M MgCl2溶液中点蚀的影响。无论是否施加应力，点蚀开始在敏化晶界夹杂物。在没有施加应力的情况下，点蚀的发生减少时，暴露于溶液的面积减少，并不是所有的夹杂物作为起始位点。然而，点蚀观察独立的暴露面积下施加的应力。外加应力加速了MnS夹杂物和敏化晶界的溶解速率。
The effects of applied stress on the pitting of sensitized Type 304 stainless steel were investigated in 4 M MgCl2 immersion test. Regardless of whether stress was applied, pitting was initiated at inclusions at sensitized grain boundaries. In the absence of applied stress, the occurrence of pitting decreased when the area exposed to the solution decreased, and not all the inclusions acted as initiation sites. However, pitting was observed independent of the exposed area under applied stress. The dissolution rates of MnS inclusions and sensitized grain boundaries were accelerated by applied stress.