Influence of crystallographic texture on susceptibility to stress corrosion cracking mechanism of API 5L X52 steel for sour service. (January 2021)

• Record Type: Journal Article
• Authors: Blanco, A.; Hallen, J.M.; Nguyen, Tang Son; Le Manh, Tu
• Is Part Of: Engineering failure analysis. Volume 119(2021)
• Publication Date: 2021-01
• Subjects: Near-neutral SCC -- Crack initiation -- API 5L steel -- EBSD -- Crystallographic orientation -- Anisotropy of Young's modulus; System failures (Engineering) -- Periodicals; Fracture mechanics -- Periodicals; Reliability (Engineering) -- Periodicals; Pannes -- Périodiques; Rupture, Mécanique de la -- Périodiques; Fiabilité -- Périodiques; Fracture mechanics; Reliability (Engineering); System failures (Engineering); Periodicals; Electronic journals; 620.112
• DOI: 10.1016/j.engfailanal.2020.105002
• Languages: English
• ISSNs: 1350-6307

Abstract

Highlights: New experimental evidence of crack initiation by SCC mechanism in pipeline steel. Initiation and propagation of near-neutral pH SCC mechanisms were studied using EBSD. New experimental evidence explaining the influence of crystallographic texture in SCC. The strong {0 0 1}//ND texture fiber shows a higher susceptibility to develop SCC. Abstract: This work studies the relationship between the early stage of stress corrosion cracking (SCC) mechanism and the crystallographic texture of API 5L X52 steel for sour service in a near-neutral pH solution. Experimental evidence of the SCC initiation of X52 steel for sour service was obtained using SEM and EBSD techniques. The results show that the crack initiation mechanism behaves like a synergistic combination of chemical attack and stress concentration at pits, being the last one the driving force to crack transition. In addition, it was found from both X-ray macrotexture and EBSD microtexture measurements that the cracks initiation process depends strongly on the material's texture characteristics and the presence of the texture fiber {0 0 1}//ND in X52 steel for sour service can increase its susceptibility to SCC. In a quantitative manner, the influence of the crystallographic texture in the SCC mechanism was explained through the relationship between the initiation of SCC cracks and the predictions of the anisotropy of Young's modulus using EBSD measurements.