Mechanistic insight into pre-strain influenced stress corrosion cracking of advanced high-strength steels in marine environment

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

Corrosion Science Pub Date : 2025-05-21 DOI:10.1016/j.corsci.2025.113057

Yifan Zheng , Zhihui Wang , Xian Zhang , Zhicheng Su , Jing Liu , Rui Yu , Kaiming Wu

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Abstract

This study investigates the stress corrosion behavior of ultrafine bainite (UFB) and quenched-partitioning (Q&P) steels with identical compositions under pre-strain (1σ_s) in marine environment. After pre-strain treatment, the TRIP effect reduced the retained austenite content in both steels. Pre-strain induced the transformation of retained austenite blocks into strain-induced martensite, increasing stress concentration. The micro-galvanic effect and high dislocation density in the multiphase structure enhanced electrochemical activity, promoting crack initiation. However, the transformation of retained austenite films into plastic lath martensite passivated crack tips，delaying crack propagation. Q&P steel with more retained austenite blocks exhibited higher stress corrosion cracking (SCC) susceptibility than that of UFB steel, due to accelerated micro-galvanic corrosion, localized stress concentration and defective rust layers. Finite element analysis further confirmed the electrochemical-mechanical coupling mechanism.

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预应变对海洋环境中高级高强钢应力腐蚀开裂影响的机理研究

研究了具有相同成分的超细贝氏体钢（UFB）和淬火分块钢（Q&；P）在海洋环境中预应变（1σs）条件下的应力腐蚀行为。预应变处理后，TRIP效应降低了两种钢的残余奥氏体含量。预应变诱导残余奥氏体块向应变诱导马氏体转变，增加应力集中。多相结构中的微电偶效应和高位错密度增强了电化学活性，促进了裂纹的萌生。然而，残余奥氏体膜转变为塑性板条马氏体钝化裂纹尖端，延迟了裂纹扩展。由于微电腐蚀加速、局部应力集中和锈层缺陷，残余奥氏体块较多的Q&钢比UFB钢表现出更高的应力腐蚀开裂（SCC）敏感性。有限元分析进一步证实了电化学-力学耦合机理。

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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.