Abstract After stress corrosion crack testing in a MgCl 2 environment, turned surface of super duplex stainless steel showed four types of cracks. The residual stress and surface defects such as feed marks and long grooves generated after machining played a significant role in the direction and orientation of these cracks. The generated cluster of cracks acted as a precursor to the formation of pits. The biaxial tensile stress in the surface promoted successive branching of cracks, which led to high crack density. The subsurface results showed that cracks passing perpendicular to feed marks found more detrimental than the other types.

中文翻译：

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加工诱导表面和亚表面改性对超级双相不锈钢应力腐蚀裂纹扩展行为的研究

摘要 在MgCl 2 环境下进行应力腐蚀裂纹试验后，超级双相不锈钢车削表面出现四种裂纹。加工后产生的残余应力和表面缺陷如进给痕和长槽对这些裂纹的方向和方向起着重要作用。产生的裂纹簇是形成凹坑的先兆。表面的双轴拉应力促进了裂纹的连续分支，导致裂纹密度高。表面下的结果表明，垂直于进给痕迹的裂纹比其他类型的裂纹危害更大。