Microstructure evolution of Al0.6CoCrFeNi high entropy alloy powder prepared by high pressure gas atomization

Shang cheng ZHOU; Peng ZHANG; Yun fei XUE; Fu chi WANG; Lu WANG; Tang qing CAO; Zhen TAN; Bao yuan CHENG; Ben peng WANG

doi:10.1016/S1003-6326(18)64728-4

Microstructure evolution of Al_0.6CoCrFeNi high entropy alloy powder prepared by high pressure gas atomization

Shang cheng ZHOU, Peng ZHANG, Yun fei XUE^*, Fu chi WANG, Lu WANG, Tang qing CAO, Zhen TAN, Bao yuan CHENG, Ben peng WANG

^*Corresponding author for this work

School of Material Science and Engineering

Research output: Contribution to journal › Article › peer-review

42 Citations (Scopus)

Abstract

The influence of cooling rate on the microstructure of Al_0.6CoCrFeNi high entropy alloy (HEA) powders was investigated. The spherical HEA powders (D₅₀≈78.65 μm) were prepared by high pressure gas atomization. The different cooling rates were achieved by adjusting the powder diameter. Based on the solidification model, the relationship between the cooling rate and the powder diameter was developed. The FCC phase gradually disappears as particle size decreases. Further analysis reveals that the phase structure gradually changes from FCC+BCC dual-phase to a single BCC phase with the increase of the cooling rate. The microstructure evolves from planar crystal to equiaxed grain with the cooling rate increasing from 3.19×10⁴ to 1.11×10⁶ K/s.

Original language	English
Pages (from-to)	939-945
Number of pages	7
Journal	Transactions of Nonferrous Metals Society of China (English Edition)
Volume	28
Issue number	5
DOIs	https://doi.org/10.1016/S1003-6326(18)64728-4
Publication status	Published - May 2018

Keywords

AlCoCrFeNi
cooling rate
high entropy alloy
high pressure gas atomization
microstructure
spherical powder

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10.1016/S1003-6326(18)64728-4

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@article{43731fc7ff94417995abad77dc3a4726,

title = "Microstructure evolution of Al0.6CoCrFeNi high entropy alloy powder prepared by high pressure gas atomization",

abstract = "The influence of cooling rate on the microstructure of Al0.6CoCrFeNi high entropy alloy (HEA) powders was investigated. The spherical HEA powders (D50≈78.65 μm) were prepared by high pressure gas atomization. The different cooling rates were achieved by adjusting the powder diameter. Based on the solidification model, the relationship between the cooling rate and the powder diameter was developed. The FCC phase gradually disappears as particle size decreases. Further analysis reveals that the phase structure gradually changes from FCC+BCC dual-phase to a single BCC phase with the increase of the cooling rate. The microstructure evolves from planar crystal to equiaxed grain with the cooling rate increasing from 3.19×104 to 1.11×106 K/s.",

keywords = "AlCoCrFeNi, cooling rate, high entropy alloy, high pressure gas atomization, microstructure, spherical powder",

author = "ZHOU, {Shang cheng} and Peng ZHANG and XUE, {Yun fei} and WANG, {Fu chi} and Lu WANG and CAO, {Tang qing} and Zhen TAN and CHENG, {Bao yuan} and WANG, {Ben peng}",

note = "Publisher Copyright: {\textcopyright} 2018 The Nonferrous Metals Society of China",

year = "2018",

month = may,

doi = "10.1016/S1003-6326(18)64728-4",

language = "English",

volume = "28",

pages = "939--945",

journal = "Transactions of Nonferrous Metals Society of China (English Edition)",

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TY - JOUR

T1 - Microstructure evolution of Al0.6CoCrFeNi high entropy alloy powder prepared by high pressure gas atomization

AU - ZHOU, Shang cheng

AU - ZHANG, Peng

AU - XUE, Yun fei

AU - WANG, Fu chi

AU - WANG, Lu

AU - CAO, Tang qing

AU - TAN, Zhen

AU - CHENG, Bao yuan

AU - WANG, Ben peng

PY - 2018/5

Y1 - 2018/5

N2 - The influence of cooling rate on the microstructure of Al0.6CoCrFeNi high entropy alloy (HEA) powders was investigated. The spherical HEA powders (D50≈78.65 μm) were prepared by high pressure gas atomization. The different cooling rates were achieved by adjusting the powder diameter. Based on the solidification model, the relationship between the cooling rate and the powder diameter was developed. The FCC phase gradually disappears as particle size decreases. Further analysis reveals that the phase structure gradually changes from FCC+BCC dual-phase to a single BCC phase with the increase of the cooling rate. The microstructure evolves from planar crystal to equiaxed grain with the cooling rate increasing from 3.19×104 to 1.11×106 K/s.

AB - The influence of cooling rate on the microstructure of Al0.6CoCrFeNi high entropy alloy (HEA) powders was investigated. The spherical HEA powders (D50≈78.65 μm) were prepared by high pressure gas atomization. The different cooling rates were achieved by adjusting the powder diameter. Based on the solidification model, the relationship between the cooling rate and the powder diameter was developed. The FCC phase gradually disappears as particle size decreases. Further analysis reveals that the phase structure gradually changes from FCC+BCC dual-phase to a single BCC phase with the increase of the cooling rate. The microstructure evolves from planar crystal to equiaxed grain with the cooling rate increasing from 3.19×104 to 1.11×106 K/s.

KW - AlCoCrFeNi

KW - cooling rate

KW - high entropy alloy

KW - high pressure gas atomization

KW - microstructure

KW - spherical powder

UR - http://www.scopus.com/inward/record.url?scp=85048491808&partnerID=8YFLogxK

U2 - 10.1016/S1003-6326(18)64728-4

DO - 10.1016/S1003-6326(18)64728-4

M3 - Article

AN - SCOPUS:85048491808

SN - 1003-6326

VL - 28

SP - 939

EP - 945

JO - Transactions of Nonferrous Metals Society of China (English Edition)

JF - Transactions of Nonferrous Metals Society of China (English Edition)

IS - 5

ER -

Microstructure evolution of Al_0.6CoCrFeNi high entropy alloy powder prepared by high pressure gas atomization

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Keywords

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