Effect of microstructural aspects in the heat-affected zone of high strength pipeline steels on the stress corrosion cracking mechanism: Part I. In acidic soil environment

Microstructures consisted of bainite/ferrite matrix and varied distribution of martensite-austenite (M-A) constituent in the heat-affected zone of X100 pipeline steel were simulated, and their effect on stress corrosion cracking (SCC) mechanism in acidic soil environment were investigated. The results showed that microstructure characteristic, especially distribution of M-A constituent, had large effect on SCC sensitivity. Micro-galvanic effect,...