Review on crack growth driving force at the tip of stress corrosion cracking in the safe end dissimilar metal welded joint

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-09-27 DOI:10.1016/j.nucengdes.2024.113609

Zheng Wang , Yuxuan Xue , Rongxin Wang , Jun Wu , Yubiao Zhang , He Xue

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引用次数: 0

Abstract

The welded structural materials of nuclear power plants (NPPs) are susceptible to environmentally-assisted cracking (EAC), represented by stress corrosion cracking (SCC), in prolonged high-temperature and high-pressure water environments, posing a significant threat to plant safety. This study aims to provide a critical review for the crack growth driving force at the tip of SCC in the safe end dissimilar metal welded joint (DMWJ) of NPPs. Firstly, SCC’s background, importance, and current research status are introduced. Secondly, a review and analysis are conducted on SCC’s initiation and growth stages, focusing on experimental methods, predictive models of crack growth rate, crack tip mechanical states, and influencing factors, clarifying the main achievements and challenges in current experimental and theoretical research. Finally, a method to mitigate crack tip driving force is proposed, followed by an in-depth analysis from a mechanical perspective on the relationship between crack growth driving force and crack growth resistance, highlighting future research trends. This review provides theoretical references and technical support for addressing the issue of SCC in welded structural materials of NPP primary circuit.

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安全端异种金属焊接接头应力腐蚀裂纹尖端裂纹生长驱动力综述

核电站（NPP）的焊接结构材料在长期的高温高压水环境中容易发生以应力腐蚀开裂（SCC）为代表的环境辅助开裂（EAC），对核电站的安全构成重大威胁。本研究旨在对核电站安全端异种金属焊接接头（DMWJ）中 SCC 尖端裂纹生长驱动力进行深入探讨。首先，介绍了 SCC 的背景、重要性和研究现状。其次，对 SCC 的起始和生长阶段进行了综述和分析，重点介绍了实验方法、裂纹生长速率预测模型、裂纹尖端力学状态和影响因素，阐明了当前实验和理论研究的主要成果和挑战。最后，提出了减缓裂纹尖端驱动力的方法，并从力学角度深入分析了裂纹生长驱动力与裂纹生长阻力之间的关系，强调了未来的研究趋势。本综述为解决核电站一次回路焊接结构材料中的 SCC 问题提供了理论参考和技术支持。

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

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.