Abstract This paper describes the stress corrosion cracking (SCC) mechanism of a new structural ultrahigh strength martensite steel Cr9Ni5MoCo14 and how cathodic potential affects the SCC susceptibility in 3.5% NaCl solution. At open circuit potential (OCP), SCC cracks initiate from pittings, and SCC mechanism involves anodic dissolution. Within the ideal cathodic protective potential range from to , the specimen has a greater SCC resistance, and SCC mechanism is mixed-controlled by both anodic dissolution and hydrogen-induced cracking. Significant hydrogen-induced crack is observed at which can be attributed to a significant amount of hydrogen atoms involving in the cracking processes.
Stress corrosion cracking of ultrahigh strength martensite steel Cr9Ni5MoCo14 in 3.5% NaCl solution
Aerospace Science and Technology ; 36 ; 125-131
2014-03-08
7 pages
Article (Journal)
Electronic Resource
English
Stress corrosion cracking of ultrahigh strength martensite steel Cr9Ni5MoCo14 in 3.5% NaCl solution
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