Abstract
Duplex Stainless Steels (DSSs) for engineering applications usually show dual-phase microstructure with directional phase distribution and considerable crystallographic texture. Here, we investigate the effect of anisotropy on the Hydrogen Embrittlement (HE) susceptibility of a 2205 DSS. Moreover, slip transfer across Grain Boundary (GB) is experimentally and theoretically analyzed. The specimen sampling along 45° Rolling Direction (RD) showed remarkable HE resistance owing to the delayed initiation and slow evolution of microcracks. Hydrogen-Assisted Cracks (HACs) frequently initiated at the austenite GBs, because the synergistic interactions between hydrogen-enhanced planar slip and slip transfer across GB promote stress/hydrogen accumulation and reduce the GB cohesion.
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