Phase Stability Effects on Hydrogen Embrittlement Resistance in Martensite–Reverted Austenite Steels

Abstract

Earlier studies have shown that interlathaustenite in martensitic steels can enhance hydrogen embrittlement (HE) resistance. However, the improvements werelimited due to micro-crack nucleation and growth.Anovel microstructural design approachis investigated,based on enhancing austenite stability to reduce crack nucleation and growth. Our findings frommechanical tests, X-ray diffraction and scanning electron microscopy reveal that this strategy is successful. However, the improvements are limited due to intrinsic microstructural heterogeneityeffects.