This paper is associated with a larger programme of research, studying the resistance to hydrogen-induced stress cracking (HISC) of a wrought and a hot isostatically-pressed (HIP) UNS S31803 duplex stainless steel (DSS), with respect to both the independent and interactive effects of the three key components of HISC: microstructure, stress/strain, and hydrogen. In the first part presented here, several material properties such as the three-dimensional (3D) microstructure, distribution and morphology/geometry of the two phases, i.e. ferrite and austenite, and their significance on hydrogen transport have been determined quantitatively, using X-ray computed tomography (CT) microstructural data analysis and modelling. This provided a foundation for the study to compare resistance to HISC initiation and propagation of the two DSSs with differing microstructures, using hydrogen permeation measurements, environmental fracture toughness testing of single-edge notched bend test specimens, in the Part 2 paper of this study .
A Quantified Study of the Resistance of Duplex Stainless Steels to HISC: Part 1 - Significance of the three-dimensional phase distributions and morphological properties on hydrogen transport
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Lisa Blanchard, Kasra Sotoudeh, H Toda, K. Hirayama, Hongbiao Dong; A Quantified Study of the Resistance of Duplex Stainless Steels to HISC: Part 1 - Significance of the three-dimensional phase distributions and morphological properties on hydrogen transport . CORROSION 2022; 3960:. doi: https://doi.org/10.5006/3960
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