ePrints@IIScePrints@IISc Home | About | Browse | Latest Additions | Advanced Search | Contact | Help

Hydrogen-induced nanohardness variations in a CoCrFeMnNi high-entropy alloy

Zhao, Yakai and Lee, Dong-Hyun and Lee, Jung-A and Kim, Woo-Jin and Han, Heung Nam and Ramamurty, Upadrasta and Suh, Jin-Yoo and Jang, Jae-il (2017) Hydrogen-induced nanohardness variations in a CoCrFeMnNi high-entropy alloy. In: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 42 (16). pp. 12015-12021.

[img] PDF
Int_JOu_Hyd_Ene_42-16_12015_2017.pdf - Published Version
Restricted to Registered users only

Download (1MB) | Request a copy
Official URL: https://doi.org/10.1016/j.ijhydene.2017.02.061


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.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 15 Jul 2017 04:52
Last Modified: 15 Jul 2017 04:52
URI: http://eprints.iisc.ac.in/id/eprint/57402

Actions (login required)

View Item View Item