Resistance of CoCrFeMnNi high-entropy alloy to gaseous hydrogen embrittlement

By Yakai Zhao, Donghwan Lee, Moo-Young Seok, J.-S. Lee, M. P. Phaniraj, Jin-Yoo Suh, Heon-Young Ha, Juyoung Kim, U. Ramamurty, J. Jang. 2017

235 citations recorded by the source corpus.

Abstract The influence of hydrogen on the mechanical behavior of the CoCrFeMnNi high-entropy alloy (HEA) was examined through tensile and nanoindentation experiments on specimens hydrogenated via gaseous and electrochemical methods. Results show that the HEA's resistance to gaseous hydrogen embrittlement is better than that of two representative austenitic stainless steels, in spite of the fact that it absorbs a larger amount of hydrogen than the two steels. Reasons for this were discussed in terms of hydrogen-enhanced localized plasticity mechanism and the critical amount of hydrogen required for it. These were further substantiated by additional experiments on electrochemically charged specimens.

Subfields: Aerospace Engineering, Mechanical Engineering, Metals and Alloys

View Paper: https://www.semanticscholar.org/paper/b81207e83538ec8c7b3eeb2c5f6908b41047916e

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In Aerospace Engineering

In Mechanical Engineering

Citations in the corpus

High-entropy functional materials (2018, background): “Zhao et al.(96) reported that the FCC CoCrFeMnNi HEA demonstrated superior resistance to gaseous hydrogen embrittlement relative to two austenitic stainless steels due to a hydrogen-enhanced localized plasticity deformation mechanism, despite the HEAs absorbing more hydrogen than the two steels.”