TY - JOUR
T1 - Grain refinement effect on hydrogen embrittlement resistance of an equiatomic CoCrFeMnNi high-entropy alloy
AU - Koyama, Motomichi
AU - Ichii, Kenshiro
AU - Tsuzaki, Kaneaki
N1 - Funding Information:
This work was supported by the JSPS KAKENHI [grant numbers JP16H06365 , JP17H04956 ] and the Japan Science and Technology Agency (JST) under the Industry-Academia Collaborative R&D program [grant number 20100113 ]. MK greatly appreciate Mr. Tatsuo Yokode and Prof. Tatsuya Morikawa for the support of cold rolling.
Publisher Copyright:
© 2019 Hydrogen Energy Publications LLC
PY - 2019/6/21
Y1 - 2019/6/21
N2 - We investigated the grain refinement effect on the resistance to hydrogen embrittlement in an equiatomic CoCrFeMnNi high-entropy alloy. In a 100 MPa hydrogen gas pre-charging condition, grain refinement to 1.9 μm improved the hydrogen embrittlement resistance in terms of the strength-elongation balance. In particular, the tensile strength of the grain refined high-entropy alloy did not decrease by hydrogen uptake. However, when the σ phase formed at a relatively low temperature, both the strength and elongation decreased due to hydrogen charging.
AB - We investigated the grain refinement effect on the resistance to hydrogen embrittlement in an equiatomic CoCrFeMnNi high-entropy alloy. In a 100 MPa hydrogen gas pre-charging condition, grain refinement to 1.9 μm improved the hydrogen embrittlement resistance in terms of the strength-elongation balance. In particular, the tensile strength of the grain refined high-entropy alloy did not decrease by hydrogen uptake. However, when the σ phase formed at a relatively low temperature, both the strength and elongation decreased due to hydrogen charging.
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U2 - 10.1016/j.ijhydene.2019.04.280
DO - 10.1016/j.ijhydene.2019.04.280
M3 - Article
AN - SCOPUS:85065907594
VL - 44
SP - 17163
EP - 17167
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
SN - 0360-3199
IS - 31
ER -
