Formation of a hexagonal closed-packed phase in Al0.5CoCrFeNi high entropy alloy

J. Wang; Y. Zhang; S. Z. Niu; W. Y. Wang; H. C. Kou; J. S. Li; S. Q. Wang; E. Beaugnon

doi:10.1557/mrc.2017.109

Formation of a hexagonal closed-packed phase in Al0.5CoCrFeNi high entropy alloy

J. Wang, Y. Zhang, S. Z. Niu, W. Y. Wang, H. C. Kou, J. S. Li, S. Q. Wang, E. Beaugnon

School of Materials Sience and Engineering

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

16 Scopus citations

Abstract

We report that a hexagonal closed-packed (HCP) phase with high cobalt content precipitates in Al0.5CoCrFeNi high entropy alloy (HEA) after 650 °C/8 h heat-Treatment. The precipitate with the shape of plate is completely located at the interdendritic region. Results of electron diffraction and high resolution transmission electron microscopy show that the HCP phase was transformed from the body-centered cubic phase through a simple shear and the two phase obey an orientation relationship. The thermodynamic stability of Al0.5CoCrFeNi HEA should be carefully reevaluated, especially at the vulnerable temperature.

Original language	English
Pages (from-to)	879-884
Number of pages	6
Journal	MRS Communications
Volume	7
Issue number	4
DOIs	https://doi.org/10.1557/mrc.2017.109
State	Published - 1 Dec 2017

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title = "Formation of a hexagonal closed-packed phase in Al0.5CoCrFeNi high entropy alloy",

abstract = "We report that a hexagonal closed-packed (HCP) phase with high cobalt content precipitates in Al0.5CoCrFeNi high entropy alloy (HEA) after 650 °C/8 h heat-Treatment. The precipitate with the shape of plate is completely located at the interdendritic region. Results of electron diffraction and high resolution transmission electron microscopy show that the HCP phase was transformed from the body-centered cubic phase through a simple shear and the two phase obey an orientation relationship. The thermodynamic stability of Al0.5CoCrFeNi HEA should be carefully reevaluated, especially at the vulnerable temperature.",

author = "J. Wang and Y. Zhang and Niu, {S. Z.} and Wang, {W. Y.} and Kou, {H. C.} and Li, {J. S.} and Wang, {S. Q.} and E. Beaugnon",

note = "Publisher Copyright: Copyright {\textcopyright} Materials Research Society 2017.",

year = "2017",

month = dec,

day = "1",

doi = "10.1557/mrc.2017.109",

language = "英语",

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TY - JOUR

T1 - Formation of a hexagonal closed-packed phase in Al0.5CoCrFeNi high entropy alloy

AU - Wang, J.

AU - Zhang, Y.

AU - Niu, S. Z.

AU - Wang, W. Y.

AU - Kou, H. C.

AU - Li, J. S.

AU - Wang, S. Q.

AU - Beaugnon, E.

PY - 2017/12/1

Y1 - 2017/12/1

N2 - We report that a hexagonal closed-packed (HCP) phase with high cobalt content precipitates in Al0.5CoCrFeNi high entropy alloy (HEA) after 650 °C/8 h heat-Treatment. The precipitate with the shape of plate is completely located at the interdendritic region. Results of electron diffraction and high resolution transmission electron microscopy show that the HCP phase was transformed from the body-centered cubic phase through a simple shear and the two phase obey an orientation relationship. The thermodynamic stability of Al0.5CoCrFeNi HEA should be carefully reevaluated, especially at the vulnerable temperature.

AB - We report that a hexagonal closed-packed (HCP) phase with high cobalt content precipitates in Al0.5CoCrFeNi high entropy alloy (HEA) after 650 °C/8 h heat-Treatment. The precipitate with the shape of plate is completely located at the interdendritic region. Results of electron diffraction and high resolution transmission electron microscopy show that the HCP phase was transformed from the body-centered cubic phase through a simple shear and the two phase obey an orientation relationship. The thermodynamic stability of Al0.5CoCrFeNi HEA should be carefully reevaluated, especially at the vulnerable temperature.

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DO - 10.1557/mrc.2017.109

M3 - 文章

AN - SCOPUS:85030839342

SN - 2159-6859

VL - 7

SP - 879

EP - 884

JO - MRS Communications

JF - MRS Communications

IS - 4

ER -

Formation of a hexagonal closed-packed phase in Al0.5CoCrFeNi high entropy alloy

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