The influence of gas and electrolytic hydrogenation on the mechanical properties of 07Kh16N6 steel

Keywords

gaseous and electrolytic hydrogenation, martensitic stainless steel, strength, plasticity and fracture toughness, hydrogen embrittlement.

Cite as

Ivaskevych L. M. and Balitskii A. I. The influence of gas and electrolytic hydrogenation on the mechanical properties of 07Kh16N6 steel. Physicochemical Mechanics of Materials. 2025. 61(2), 132-138.

https://doi.org/10.15407/pcmm2025.02.132

Abstract

The effect of hydrogen gas in the pressure range of 0–10 MPa and electrolytic hydrogena­tion time of 0…10 h at a current density of 5×10^–2 A/m² on the strength and plasticity of smooth and notched samples of martensitic stainless 07Cr16Ni6 steel was studied at the deformation rates of 0.1 and 1 mm/min. It was found that hydrogen gas has almost no effect on the tensile strength and yield strength of smooth specimens. The tensile strength of notched specimens and the plastic characteristics of smooth and notched spe­ci­mens are reduced by 40–87% under the influence of hydrogen. The maximum hydrogen embrittle­ment was detected at a tensile speed of 0.1 mm/min, a hydrogen pressure of 5 MPa, or after electrolytic hydrogenation for 5 h at a current density of 5×10^–2 A/m². The cadmium coating significantly reduces the effect of hydrogen at room temperature, but does not protect against hydrogen absorption at 473 K. The fractographic features of fracture in the presence of hydrogen are analyzed.

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