Zhe Zhu , Yong Lu , Tianjie Huang , Jinbin Zhao , Chen Chen , Hongchi Ma , Zhiyong Liu , Xuequn Cheng , Xiaogang Li
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引用次数: 0
Abstract
The localized corrosion and stress corrosion cracking (SCC) initiation induced by Ca-modified inclusions in EH500 high-strength steel was investigated in acidic marine environment. The inclusions are mainly spherical (Ca,Al)O-CaS complex compounds with Al and Ca uniformly distributed. The CaS part of the inclusion as well as interfacial matrix can be preferentially dissolved to form microcrevice which resulted in chemical dissolution of the oxide part and formation of corrosion pits. The inclusion-induced corrosion pits could be overwhelmed by uniform corrosion in stress-free condition, whereas they could further induce SCC initiation under high level of tensile stress.
研究了 EH500 高强度钢在酸性海洋环境中由 Ca 改性夹杂物诱发的局部腐蚀和应力腐蚀开裂（SCC）。夹杂物主要是球形（Ca,Al）O-CaS 复合物，其中 Al 和 Ca 分布均匀。夹杂物中的 CaS 部分以及界面基质会优先溶解形成微裂隙，从而导致氧化物部分的化学溶解并形成腐蚀坑。在无应力条件下，夹杂物引起的腐蚀坑可被均匀腐蚀所淹没，而在高拉伸应力条件下，夹杂物引起的腐蚀坑可进一步诱发 SCC。
期刊介绍：
Engineering Failure Analysis publishes research papers describing the analysis of engineering failures and related studies.
Papers relating to the structure, properties and behaviour of engineering materials are encouraged, particularly those which also involve the detailed application of materials parameters to problems in engineering structures, components and design. In addition to the area of materials engineering, the interacting fields of mechanical, manufacturing, aeronautical, civil, chemical, corrosion and design engineering are considered relevant. Activity should be directed at analysing engineering failures and carrying out research to help reduce the incidences of failures and to extend the operating horizons of engineering materials.
Emphasis is placed on the mechanical properties of materials and their behaviour when influenced by structure, process and environment. Metallic, polymeric, ceramic and natural materials are all included and the application of these materials to real engineering situations should be emphasised. The use of a case-study based approach is also encouraged.
Engineering Failure Analysis provides essential reference material and critical feedback into the design process thereby contributing to the prevention of engineering failures in the future. All submissions will be subject to peer review from leading experts in the field.
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