Effect of cathodic polarisation on stress corrosion cracking behaviour of a Ni(Fe, Al)-maraging steel in artificial seawater

被引：48
|
作者：
Zhao, Tianliang [1 ,2 ]
Wang, Shiqi [1 ]
Liu, Zhiyong [1 ]
Du, Cuiwei [1 ]
Li, Xiaogang [1 ]
机构：
[1] Univ Sci & Technol Beijing, Natl Mat Corros & Protect Sci Data Ctr, Key Lab Corros & Protect MOE, Beijing 100083, Peoples R China
[2] Shanghai Univ, Sch Mat Sci & Engn, Shanghai 200444, Peoples R China
来源：
CORROSION SCIENCE | 2021年 / 179卷
基金：
中国国家自然科学基金;
关键词：
Cathodic potential; Maraging steel; Hydrogen embrittlement; Intergranular; Cracking; Stress corrosion; ENVIRONMENTALLY ASSISTED CRACKING; HYDROGEN EMBRITTLEMENT; MARAGING-STEEL; E690; STEEL; MICROSTRUCTURAL EVOLUTION; MECHANICAL-BEHAVIOR; PIPELINE STEEL; X70; SUSCEPTIBILITY; PLASTICITY;
D O I：
10.1016/j.corsci.2020.109176
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of cathodic polarisation on stress corrosion cracking (SCC) behaviour of peak-aged Ni(Fe, Al)-maraging steel in artificial seawater was investigated. The steel shows better compatibility of strength and hydrogen embrittlement (HE) resistance than reported 18Ni-type maraging steels when potential is above -850 mV. This advantage stems from the abundant and evenly dispersed Ni(Fe, Al) nanoprecipitates. SCC occurs above -850 mV in a transgranular/intergranular-mixed manner involving a mechanics-dominant-anodic-dissolution-promoted mechanism and below -850 mV in an intergranular manner along parent austenite grain boundaries involving HE. For interpreting the HE mechanism, a novel model is proposed based on hydrogen-weakening interatomic bonds.
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收藏
页数：17
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