Phase Stability Effects on Hydrogen Embrittlement Resistance in Martensite–Reverted Austenite Steels
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Earlier studies have shown that interlath austenite in martensitic steels can enhance hydrogen embrittlement (HE) resistance. However, the improvements were limited due to microcrack nucleation and growth. A novel microstructural design approach is investigated, based on enhancing austenite stability to reduce crack nucleation and growth. Our findings from mechanical tests, X-ray diffraction, and scanning electron microscopy reveal that this strategy is successful. However, the improvements are limited due to intrinsic microstructural heterogeneity effects.
The authors gratefully acknowledge the use of the shared experimental facilities supported in part by the MRSEC program of the National Science foundation under the award number DMR – 1419807.
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