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Nano-graining a particle-strengthened high-entropy alloy

Title
Nano-graining a particle-strengthened high-entropy alloy
Author
장재일
Keywords
High-entropy alloy; Particle strengthening; Grain boundary strengthening; High-pressure torsion; Nanoindentation
Issue Date
2019-04
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
SCRIPTA MATERIALIA, v. 163, Page. 24-28
Abstract
The possibility of further enhancing the strength of a (CoCrFeNi)(94)Ti2Al4 high-entropy alloy (HEA), which is already strengthened by Ni-3(Ti,Al) second-phase particles, by grain refinement through high-pressure torsion (HPT) is examined. Concomitant with nanograin formation, HPT was found to induce particle dissolution and structural transformation of the remnant particles. Nanoindentation experiments of nanocrystalline HEA, with and without particles in the pre-HPT microstructure, suggests that grain boundary strengthening is the dominant strengthening mechanism. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
URI
https://www.sciencedirect.com/science/article/pii/S1359646218307681?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/110955
ISSN
1359-6462
DOI
10.1016/j.scriptamat.2018.12.033
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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