The mitigating effect introduced by intergranular Cr carbides on the stress corrosion cracking propagation of a cold-worked Alloy 600 has been firstly examined through high-resolution 3-dimensional (3D) sequential sectioning. High-resolution transmission electron microscope (TEM) and transmission Kikuchi diffraction (TKD) are used to reveal the underlying mechanisms contributing to the mitigating effect. Previously reported mechanisms contributing to the increased stress corrosion cracking resistance are evaluated and discussed. A new mechanism based on grain boundary migration inhibition and crack path deviation is proposed.

中文翻译：

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晶间碳化物在改善冷作合金600中的应力腐蚀开裂性方面的作用

首先通过高分辨率3维（3D）连续切片研究了晶间Cr碳化物对冷加工合金600的应力腐蚀裂纹扩展的缓解作用。高分辨率透射电子显微镜（TEM）和透射菊池衍射（TKD）用于揭示有助于缓解效果的潜在机理。评估并讨论了以前报道的有助于提高应力腐蚀开裂强度的机理。提出了一种基于晶界迁移抑制和裂纹路径偏离的新机理。