Effect of cathodic polarisation on stress corrosion cracking behaviour of a Ni(Fe, Al)-maraging steel in artificial seawater
作者： Tianliang Zhao , Shiqi Wang , Zhiyong Liu , Cuiwei Du , Xiaogang Li
DOI: 10.1016/J.CORSCI.2020.109176
关键词: Materials science 、 Compatibility (geochemistry) 、 Intergranular corrosion 、 Maraging steel 、 Corrosion 、 Artificial seawater 、 Metallurgy 、 Cathodic polarisation 、 Hydrogen embrittlement 、 Stress corrosion cracking
摘要: Abstract The effect of cathodic polarisation on stress corrosion cracking (SCC) behaviour peak-aged Ni(Fe, Al)-maraging steel in artificial seawater was investigated. shows better compatibility strength and hydrogen embrittlement (HE) resistance than reported 18Ni-type maraging steels when potential is above −850 mV. This advantage stems from the abundant evenly dispersed Al) nanoprecipitates. SCC occurs mV a transgranular/intergranular-mixed manner involving mechanics-dominant-anodic-dissolution-promoted mechanism below an intergranular along parent austenite grain boundaries HE. For interpreting HE mechanism, novel model proposed based hydrogen-weakening interatomic bonds.
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