晶粒尺寸和晶界类型对奥氏体不锈钢晶间应力腐蚀开裂的影响：相场研究

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Science Pub Date : 2024-11-05 DOI:10.1016/j.corsci.2024.112557

Qionghuan Zeng, Yiming Chen, Zhongsheng Yang, Lei Zhang, Zhijun Wang, Lei Wang, Junjie Li, Jincheng Wang

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引用次数: 0

摘要

本研究利用与多晶微观结构相耦合的相场模型来研究晶粒尺寸和晶界类型对奥氏体不锈钢晶间应力腐蚀开裂的影响。考虑到稀溶液环境，假设两相的自由能密度呈抛物线形式。粗晶粒微结构中的腐蚀裂纹扩展速度较慢，这是因为跨晶粒开裂的频率较高。低角度晶界能有效地将晶间腐蚀裂纹偏转到腐蚀敏感性较低的晶粒中，从而阻碍裂纹扩展。双晶界通过减少潜在的起始点来减缓腐蚀裂纹的扩展。

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Effect of grain size and grain boundary type on intergranular stress corrosion cracking of austenitic stainless steel: A phase-field study

A phase-field model coupled with polycrystalline microstructure is utilized to investigate the effect of grain size and grain boundary types on intergranular stress corrosion cracking in austenitic stainless steels. Considering the dilute solution environment, the free energy density of the two phases is hypothesized to be in parabolic form. The slower corrosion crack propagation rate in coarse-grained microstructures can be attributed to a higher frequency of transgranular cracking. Low-angle grain boundaries can effectively deflect intergranular corrosion cracks into grains with lower corrosion susceptibility, thereby impeding crack propagation. Twin boundaries mitigate corrosion crack propagation by reducing potential initiation sites.

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来源期刊

Corrosion Science 工程技术-材料科学：综合

CiteScore

13.60

自引率

18.10%

发文量

763

审稿时长

46 days

期刊介绍： Corrosion occurrence and its practical control encompass a vast array of scientific knowledge. Corrosion Science endeavors to serve as the conduit for the exchange of ideas, developments, and research across all facets of this field, encompassing both metallic and non-metallic corrosion. The scope of this international journal is broad and inclusive. Published papers span from highly theoretical inquiries to essentially practical applications, covering diverse areas such as high-temperature oxidation, passivity, anodic oxidation, biochemical corrosion, stress corrosion cracking, and corrosion control mechanisms and methodologies. This journal publishes original papers and critical reviews across the spectrum of pure and applied corrosion, material degradation, and surface science and engineering. It serves as a crucial link connecting metallurgists, materials scientists, and researchers investigating corrosion and degradation phenomena. Join us in advancing knowledge and understanding in the vital field of corrosion science.