NDLI: Effect of Strength and Microstructure on Stress Corrosion Cracking Behavior and Mechanism of X80 Pipeline Steel in High pH Carbonate/Bicarbonate Solution

Content Provider	Springer Nature Link
Author	Zhu, Min Du, Cuiwei Li, Xiaogang Liu, Zhiyong Wang, Shengrong Zhao, Tianliang Jia, Jinghuan
Copyright Year	2014
Abstract	The stress corrosion cracking (SCC) behaviors and mechanisms of X80 pipeline steels with different strength and microstructure in high pH carbonate/bicarbonate solution were investigated by slow strain rate testing and electrochemical test. The results showed that the cracking mode of low strength X80 steel composed of bulky polygonal ferrite and granular bainite in high pH solution was intergranular (IGSCC), and the SCC mechanism was anodic dissolution (AD). While the mixed cracking mode of high strength X80 steel consisted of fine acicular ferrite and granular bainite was intergranular (IGSCC) in the early stage, and transgranular (TGSCC) in the later stage. The decrease of pH value of crack tip was probably the key reason for the occurrence of TGSCC. The SCC mechanism may be a mixed mode of AD and hydrogen embrittlement (HE), and the HE mechanism may play a significant role in the deep crack propagation at the later stage. The cracking modes and SCC mechanisms of the two X80 steels were associated with its microstructure and strength.
Starting Page	1358
Ending Page	1365
Page Count	8
File Format	PDF
ISSN	10599495
Journal	Journal of Materials Engineering and Performance
Volume Number	23
Issue Number	4
e-ISSN	15441024
Language	English
Publisher	Springer US
Publisher Date	2014-02-04
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	X80 pipeline steel stress corrosion cracking strength and microstructure hydrogen embrittlement Characterization and Evaluation of Materials Tribology, Corrosion and Coatings Quality Control, Reliability, Safety and Risk Engineering Design
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Materials Science Mechanical Engineering

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