Corrosion fatigue – Understanding damage from smooth surfaces

IF 5.6 2区工程技术 Q1 ENGINEERING, MECHANICAL

Theoretical and Applied Fracture Mechanics Pub Date : 2025-08-24 DOI:10.1016/j.tafmec.2025.105190

Robert Akid

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引用次数: 0

Abstract

The mechanism of corrosion fatigue (CF) of components that do not contain pre-existing defects consists of several damage regimes including stress-assisted corrosion and corrosion-assisted cracking. In this paper a review of these damage regimes is given and supported by experimental evidence. From this knowledge one specific probabilistic model is presented that simulates damage initiated by localised pitting corrosion, followed by the pit-crack transition and early stages of cracking in order to predict corrosion fatigue lifetime. The paper also addresses the role of strain localisation in the formation and location of cracks associated with pits along with references to multi-site pit-initiated cracking and coalescence. From an industrial perspective, understanding the state of damage in a component or structure allows consideration of any maintenance intervention. Further, given details of the size of the pit and the applied stress level, the potential for crack initiation and subsequent crack propagation can be estimate through appropriate modelling.

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腐蚀疲劳-了解光滑表面的损伤

不含预先存在缺陷的部件的腐蚀疲劳（CF）机制包括几种损伤机制，包括应力辅助腐蚀和腐蚀辅助开裂。本文对这些损伤机制进行了综述，并给出了实验证据。根据这些知识，提出了一个特定的概率模型，模拟由局部点蚀引起的损伤，然后是点裂纹转变和早期裂纹阶段，以预测腐蚀疲劳寿命。本文还讨论了应变局部化在与凹坑相关的裂纹的形成和定位中的作用，并参考了多点凹坑引发的裂纹和合并。从工业角度来看，了解组件或结构的损坏状态可以考虑任何维护干预。此外，考虑到坑的大小和施加的应力水平的细节，裂纹萌生和随后的裂纹扩展的可能性可以通过适当的建模来估计。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Theoretical and Applied Fracture Mechanics 工程技术-工程：机械

CiteScore

8.40

自引率

18.90%

发文量

435

审稿时长

37 days

期刊介绍： Theoretical and Applied Fracture Mechanics'' aims & scopes have been re-designed to cover both the theoretical, applied, and numerical aspects associated with those cracking related phenomena taking place, at a micro-, meso-, and macroscopic level, in materials/components/structures of any kind. The journal aims to cover the cracking/mechanical behaviour of materials/components/structures in those situations involving both time-independent and time-dependent system of external forces/moments (such as, for instance, quasi-static, impulsive, impact, blasting, creep, contact, and fatigue loading). Since, under the above circumstances, the mechanical behaviour of cracked materials/components/structures is also affected by the environmental conditions, the journal would consider also those theoretical/experimental research works investigating the effect of external variables such as, for instance, the effect of corrosive environments as well as of high/low-temperature.