Zhao, Yakai Lee, Dong-Hyun Lee, Jung-A Kim, Woo-Jin Han, Heung Nam Ramamurty, Upadrasta Suh, Jin-Yoo Jang, Jae-il 2024-01-20T01:34:01Z 2024-01-20T01:34:01Z 2021-09-01 2017-04-20 0360-3199 https://pubs.kist.re.kr/handle/201004/122839 The influence of electrochemically charged hydrogen (H) on the hardness (H-N) of a CoCrFeMnNi high-entropy alloy (HEA) was investigated with nanoindentation. Upon charging, H-N of HEA increases by similar to 60%, which decreases gradually during subsequent aging at room temperature, and on prolonged aging, the alloy softens to an extent that H-N falls below that of the uncharged HEA. These H-induced mechanical property variations are rationalized in terms of the competition between solid solution hardening caused by H and excess vacancy creation due to deeply trapped H. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD MECHANICAL-PROPERTIES STORAGE PROPERTIES DISLOCATION NUCLEATION NANOCRYSTALLINE BEHAVIOR NI MICROSTRUCTURE SUSCEPTIBILITY DEFORMATION STABILITY Hydrogen-induced nanohardness variations in a CoCrFeMnNi high-entropy alloy Article 10.1016/j.ijhydene.2017.02.061 1 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.42, no.16, pp.12015 - 12021 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 42 16 12015 12021 scie scopus 000403381400124 2-s2.0-85015411248 Chemistry, Physical Electrochemistry Energy & Fuels Chemistry Electrochemistry Energy & Fuels Article MECHANICAL-PROPERTIES STORAGE PROPERTIES DISLOCATION NUCLEATION NANOCRYSTALLINE BEHAVIOR NI MICROSTRUCTURE SUSCEPTIBILITY DEFORMATION STABILITY High-entropy alloy Hydrogen Nanoindentation Thermal desorption spectroscopy