Abstract The present work elucidates the individual implication of wide spectrum of grain size on degree of sensitization (DOS) and intergranular corrosion in alloy 600H. Experimental evidences suggest that both the sensitization and desensitization phenomena are significantly delayed in the coarse-grained specimens. This is attributable to the lower driving force available in the coarser grains for the diffusion of Cr from the grain to the boundary. Interestingly, a Hall-Petch type relation has been observed between DOS (as well as weight loss) and grain size in which both the DOS and weight loss varied inversely proportional to the (grain size)1/4.

中文翻译：

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镍基高温合金中晶间腐蚀程度与晶粒尺寸之间的“Hall-Petch”类型关系

摘要 目前的工作阐明了宽谱晶粒尺寸对 600H 合金的敏化度 (DOS) 和晶间腐蚀的个别影响。实验证据表明，在粗粒试样中，敏化和脱敏现象都显着延迟。这是由于粗晶粒中用于 Cr 从晶粒扩散到边界的驱动力较低。有趣的是，在 DOS（以及重量损失）和晶粒尺寸之间观察到了 Hall-Petch 类型的关系，其中 DOS 和重量损失都与（晶粒尺寸）1/4 成反比。