Effect of tempering temperature on hydrogen permeability and brittleness of quenched steel (a discussion)

Mindyuk, A. K.; Svist, E. I.; Babei, Yu. I.; Karpenko, G. V.

doi:10.1007/bf00721137

Cited by 2 publications

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“…An interesting discussion of the effect of microstructure on hydrogen diffusion rates was presented by Mindyuk, Svist, Babei, and Karpenko (1971), in which the effect of the carbon in the oversaturated martensite in preventing the diffusion of hydrogen was related to the stress field present in the martensite structure.…”

Section: Effect Of Microstructure On Hydrogen Diffusionmentioning

confidence: 99%

Environmentally assisted cracking and hydrogen diffusion in traditional and high-strength pipeline steels

et al. 2015

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This article deals with the risk of environmentally assisted cracking of steel structures that are kept under cathodic protection (CP). The experimental results collected on both hydrogen diffusion and hydrogen embrittlement (HE) of high-strength low-alloy (HSLA) steels under CP are discussed. Hydrogen diffusion was evaluated by permeation experiments and a scanning photoelectrochemical current technique, as a function of microstructure orientation, on both loaded and unloaded specimens. HE tests were carried out under constant load, slow strain rate (SSR tests), and slow bending conditions. Tests were also carried out on several grades of HSLA steel having different microstructures. The results confirm that HE in artificial seawater under CP can occur in steel with tensile yield strength in the range of 400–660 MPa only in the presence of high cathodic polarization and continuous plastically straining conditions. HE susceptibility increased with increasing applied cathodic polarization and with decreasing strain rate. HE susceptibility of the rolled steels at relatively high strain rate (10-4 to 10-5 s-1) increased with the hydrogen diffusion coefficient. Similar results were observed in terms of the HE contribution to corrosion fatigue crack growth rate. High-temperature-tempered martensitic steels showed a lower HE susceptibility.

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Section: Effect Of Microstructure On Hydrogen Diffusionmentioning

confidence: 99%