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Compaction Behavior of Water-Atomized CoCrFeMnNi High-Entropy Alloy Powders

Title
Compaction Behavior of Water-Atomized CoCrFeMnNi High-Entropy Alloy Powders
Authors
Yim, DamiMin Ji JangJae Wung BaeMoon, JongunChul-Hee LeeSoon-Jik HongSun Ig HongKIM, HYOUNG SEOP
POSTECH Authors
KIM, HYOUNG SEOP
Date Issued
Jun-2017
Publisher
ELSEVIER SCIENCE SA
Abstract
In this work, compaction behavior of CoCrFeMnNi high-entropy alloy powders with various particle sizes and size distributions, produced by water atomization, was investigated experimentally and theoretically. Theoretical modeling was employed using a pressure-dependent yield function in associated with a phenomenological constitutive model. Results for the quantitative densification behaviors from the experimental and theoretical analyses are in good agreement. We found that the size and size distribution of the powder particles are important factors in the tap density as with conventional powder compaction. The compact density of large powder particles with coarse dendrite arm spacing is high due to low deformation resistance and low strain hardening (i.e., low evolution of dislocation density). (C) 2017 Elsevier B.V. All rights reserved.
In this work, compaction behavior of CoCrFeMnNi high-entropy alloy powders with various particle sizes and size distributions, produced by water atomization, was investigated experimentally and theoretically. Theoretical modeling was employed using a pressure-dependent yield function in associated with a phenomenological constitutive model. Results for the quantitative densification behaviors from the experimental and theoretical analyses are in good agreement. We found that the size and size distribution of the powder particles are important factors in the tap density as with conventional powder compaction. The compact density of large powder particles with coarse dendrite arm spacing is high due to low deformation resistance and low strain hardening (i.e., low evolution of dislocation density). (C) 2017 Elsevier B.V. All rights reserved.
Keywords
DEFORMATION-BEHAVIOR; MECHANICAL-PROPERTIES; CRYSTAL-STRUCTURES; MICROSTRUCTURE; DENSIFICATION; TEMPERATURES; METALLURGY; ELEMENTS
URI
http://oasis.postech.ac.kr/handle/2014.oak/40966
DOI
10.1016/j.matchemphys.2017.06.013
ISSN
0254-0584
Article Type
Article
Citation
MATERIALS CHEMISTRY AND PHYSICS, vol. 210, page. 95 - 102, 2017-06
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 KIM, HYOUNG SEOP
Dept of Materials Science & Enginrg
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