We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
A Comparative Study of the Role of Hydrogen on Degradation of the Mechanical Properties of API X60, X60SS, and X70 Pipeline Steels.
- Authors
Rahman, K. M. Mostafijur; Mohtadi‐Bonab, Mohammad Ali; Ouellet, Ryan; Szpunar, Jerzy
- Abstract
Three grades of high strength pipeline steel (API X60, X60SS, and X70) are subjected to cathodic hydrogen charging to determine the susceptibility of each steel grade to hydrogen‐induced cracking (HIC). The specimens are subjected to tensile stress until failure to generate stress‐strain, ductility, and toughness data. The fractured specimens are analyzed using a scanning electron microscope equipped with an EDS detector to determine crack initiation sites for the investigated grades of steel. The expectation that the X60SS steel grade will perform better than other grades is not met, instead it is found that under the cathodic hydrogen charging condition, the X60SS is more susceptible than the other two steel grades with respect to loss of toughness, ductility, and ultimate tensile strength. The presence of Ca‐Al‐based inclusions is the most common along the fracture surfaces. Therefore, these inclusions also act as fairly strong trapping sites that under plastically strained conditions, they can result in fisheye features which severely impact the mechanical properties of the steel specimens.
- Subjects
PIPELINES; STEEL pipe; HIGH strength steel; STEEL
- Publication
Steel Research International, 2019, Vol 90, Issue 8, pN.PAG
- ISSN
1611-3683
- Publication type
Article
- DOI
10.1002/srin.201900078