L. BECKER, S. BENITO
Austenitic stainless steels produced by powder metallurgy (PM) reportedly exhibit higher resistance to hydrogen embrittlement than conventionally produced grades, attributed to their lower tendency for martensitic phase transformation. The present work investigates the role of chemical homogeneity in influencing the phase stability of PM-produced metastable austenitic steel X2CrNi18-9. Slow strain rate tensile tests were conducted on cast and hot-formed (wrought) specimens, as well as PM conditions produced by hot isostatic pressing and PBF-LB/M. Simultaneous electron backscatter diffraction and energy-dispersive X-ray spectrometry of the wrought material revealed band-like Ni and Cr segregations elongated along the deformation direction. Ni-depleted regions were identified as preferential sites for martensite formation, propagating in a block-like manner into higher austenite stability regions. In contrast, PM conditions demonstrated greater chemical homogeneity, leading to a decreased fraction of deformation-induced martensite. This study elucidates that chemical homogeneity is critical in assessing hydrogen embrittlement resistance in austenitic stainless steels, highlighting its importance alongside other factors.
@article{1ef5f16c-89d5-4653-af69-dd8632fd76ba,
title={2026 Becker X2CrNi18 9 Martensitic Transformation},
author={L. BECKER and S. BENITO},
year={2026},
language={en}
}TY - JOUR TI - 2026 Becker X2CrNi18 9 Martensitic Transformation AU - L. BECKER AU - S. BENITO PY - 2026 LA - en ER -
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