Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/157015
Title: Exploring the hydrogen absorption and strengthening behavior in nanocrystalline face-centered cubic high-entropy alloys
Authors: Zhao, Yakai
Park, Jeong-Min
Murakami, Kotaro
Komazaki, Shin-ichi
Kawasaki, Megumi
Tsuchiya, Koichi
Suh, Jin-Yoo
Ramamurty, Upadrasta
Jang, Jae-il
Keywords: Engineering::Mechanical engineering
Issue Date: 2021
Source: Zhao, Y., Park, J., Murakami, K., Komazaki, S., Kawasaki, M., Tsuchiya, K., Suh, J., Ramamurty, U. & Jang, J. (2021). Exploring the hydrogen absorption and strengthening behavior in nanocrystalline face-centered cubic high-entropy alloys. Scripta Materialia, 203, 114069-. https://dx.doi.org/10.1016/j.scriptamat.2021.114069
Project: A18B1b0061
Journal: Scripta Materialia
Abstract: The effect of marked change in grain size from coarse-grained to nanocrystalline can affect the hydrogen absorption and plastic deformation behavior in two face-centered cubic high-entropy alloys (HEAs), viz. equiatomic CoCrFeNi and CoCrFeMnNi. Thermal desorption analysis of the hydrogen-charged samples proved that grain boundaries act as hydrogen traps and thus largely increase the hydrogen contents in the nanocrystalline samples. A direct comparison in the hydrogen absorption between two HEAs confirms that both chemical composition and grain size are crucial factors contributing to the hydrogen solubility of the HEAs. The parameters for the thermally activated deformation from nanoindentation rate-jump tests suggest enhanced lattice friction by hydrogen, leading to a reduction in activation volume and thus modification of the plastic deformation processes. The results are discussed in two aspects, viz. the effect of grain size and chemical composition on the hydrogen-affected plastic deformation.
URI: https://hdl.handle.net/10356/157015
ISSN: 1359-6462
DOI: 10.1016/j.scriptamat.2021.114069
Rights: © 2021 Acta Materialia Inc. All rights reserved. This paper was published by Elsevier Ltd in Scripta Materialia and is made available with permission of Acta Materialia Inc.
Fulltext Permission: embargo_20231107
Fulltext Availability: With Fulltext
Appears in Collections:MAE Journal Articles

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