Compaction behavior of water-atomized CoCrFeMnNi high-entropy alloy powders

被引：32

作者：

Yim, Dami ^{[1
,2
]}

Jang, Min Ji ^{[1
,2
]}

Bae, Jae Wung ^{[1
,2
]}

Moon, Jongun ^{[1
,2
]}

Lee, Chul-Hee ^{[3
,4
]}

Hong, Soon-Jik ^{[3
,4
]}

Hong, Sun Ig ^{[5
]}

Kim, Hyoung Seop ^{[1
,2
]}

机构：

[1] Pohang Univ Sci & Technol POSTECH, Dept Mat Sci & Engn, Pohang 37673, South Korea

[2] Pohang Univ Sci & Technol POSTECH, Ctr High Entropy Alloys, Pohang 37673, South Korea

[3] Kongju Natl Univ, Div Adv Mat Engn, Cheonan 32588, South Korea

[4] Kongju Natl Univ, Inst Rare Met, Cheonan 32588, South Korea

[5] Chungnam Natl Univ, Dept Mat Sci & Engn, Daejon 34134, South Korea

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2018年 / 210卷

基金：

新加坡国家研究基金会;

关键词：

High entropy alloy; Powder metallurgy; Compaction; Dislocation density; DEFORMATION-BEHAVIOR; MECHANICAL-PROPERTIES; MICROSTRUCTURE; DENSIFICATION;

D O I：

10.1016/j.matchemphys.2017.06.013

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页码：95 / 102

页数：8

共 39 条

[1] Microstructure and texture evolution during annealing of equiatomic CoCrFeMnNi high-entropy alloy [J].