Resistance of CoCrFeMnNi high-entropy alloy to gaseous hydrogen embrittlement
- Resistance of CoCrFeMnNi high-entropy alloy to gaseous hydrogen embrittlement
- 서진유; 조아개; 이동현; 석무영; 이정아; M.P. Phaniraj; 하헌영; 김주영; Upadrasta Ramamurty; 장재일
- High-entropy alloy; Hydrogen embrittlement; Tensile test; Nanoindentation; Thermal desorption spectroscopy
- Issue Date
- Scripta materialia
- VOL 135-58
- 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.
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