A newfound 13Cr austenitic stainless steel with high hydrogen embrittlement resistance

Current researches led to develop of an austenitic stainless steel including 13Cr with an excellent blending of very high yield strength, ductility and hydrogen embrittlement resistance using combining hetero-deformation induced strengthening and martensitic transformation induced plasticity effects.

Current researches led to develop of an austenitic stainless steel including 13Cr with an excellent blending of very high yield strength, ductility and hydrogen embrittlement resistance using combining hetero-deformation induced strengthening and martensitic transformation induced plasticity effects. This study suplies a manner for the design and industrial production of high strength, high ductility and hydrogen embrittlement resistant stainless steels that can be used in harsh service environments including hydrogen.

In this novel steel, room temperature metastable austenite is boosted by adding 8 wt% Mn to a 13Cr–5Ni–2Mo supermartensitic stainless steel. In this study, a heterostructure involving residual martensite grains placed between lath austenite grains and micrometer-sized austenite grains inserted inside ultrafine grains, was produced by cold rolling and annealing. this newfound 13Cr austenitic stainless steel shows a high mechanical properties including yield strength, tensile strength and total elongation of 923 MPa, 1085 MPa and 33.2%, respectively. The hydrogen embrittlement resistance of the novel steel was also raised about 40% in comparison to 13Cr–5Ni–2Mo supermartensitic stainless steel.

Source:

https://www.sciencedirect.com/science/article/abs/pii/S0921509320309084

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