Microstructure of laser re-melted AlCoCrCuFeNi high entropy alloy coatings produced by plasma spraying

Tai Man Yue; Hui Xie; Xin Lin; Haiou Yang; Guanghui Meng

doi:10.3390/e15072833

Microstructure of laser re-melted AlCoCrCuFeNi high entropy alloy coatings produced by plasma spraying

Tai Man Yue, Hui Xie, Xin Lin, Haiou Yang, Guanghui Meng

Research output: Journal article publication › Journal article › Academic research › peer-review

90 Citations (Scopus)

Abstract

An AlCoCrCuFeNi high-entropy alloy (HEA) coating was fabricated on a pure magnesium substrate using a two-step method, involving plasma spray processing and laser re-melting. After laser re-melting, the microporosity present in the as-sprayed coating was eliminated, and a dense surface layer was obtained. The microstructure of the laser-remelted layer exhibits an epitaxial growth of columnar dendrites, which originate from the crystals of the spray coating. The presence of a continuous epitaxial growth of columnar HEA dendrites in the laser re-melted layer was analyzed based on the critical stability condition of a planar interface. The solidification of a columnar dendrite structure of the HEA alloy in the laser-remelted layer was analyzed based on the Kurz-Giovanola-Trivedi model and Hunt's criterion, with modifications for a multi-component alloy.

Original language	English
Pages (from-to)	2833-2845
Number of pages	13
Journal	Entropy
Volume	15
Issue number	7
DOIs	https://doi.org/10.3390/e15072833
Publication status	Published - 1 Jul 2013

Keywords

Columnar-to-equiaxed transition
Epitaxial growth
High entropy alloy
Laser melting
Plasma spray

ASJC Scopus subject areas

General Physics and Astronomy

More information

10.3390/e15072833

http://hdl.handle.net/10397/25043

Cite this

@article{8fb137b0467644d4b9f9d66853cc5828,

title = "Microstructure of laser re-melted AlCoCrCuFeNi high entropy alloy coatings produced by plasma spraying",

abstract = "An AlCoCrCuFeNi high-entropy alloy (HEA) coating was fabricated on a pure magnesium substrate using a two-step method, involving plasma spray processing and laser re-melting. After laser re-melting, the microporosity present in the as-sprayed coating was eliminated, and a dense surface layer was obtained. The microstructure of the laser-remelted layer exhibits an epitaxial growth of columnar dendrites, which originate from the crystals of the spray coating. The presence of a continuous epitaxial growth of columnar HEA dendrites in the laser re-melted layer was analyzed based on the critical stability condition of a planar interface. The solidification of a columnar dendrite structure of the HEA alloy in the laser-remelted layer was analyzed based on the Kurz-Giovanola-Trivedi model and Hunt's criterion, with modifications for a multi-component alloy.",

keywords = "Columnar-to-equiaxed transition, Epitaxial growth, High entropy alloy, Laser melting, Plasma spray",

author = "Yue, {Tai Man} and Hui Xie and Xin Lin and Haiou Yang and Guanghui Meng",

year = "2013",

month = jul,

day = "1",

doi = "10.3390/e15072833",

language = "English",

volume = "15",

pages = "2833--2845",

journal = "Entropy",

issn = "1099-4300",

publisher = "Multidisciplinary Digital Publishing Institute (MDPI)",

number = "7",

}

TY - JOUR

T1 - Microstructure of laser re-melted AlCoCrCuFeNi high entropy alloy coatings produced by plasma spraying

AU - Yue, Tai Man

AU - Xie, Hui

AU - Lin, Xin

AU - Yang, Haiou

AU - Meng, Guanghui

PY - 2013/7/1

Y1 - 2013/7/1

N2 - An AlCoCrCuFeNi high-entropy alloy (HEA) coating was fabricated on a pure magnesium substrate using a two-step method, involving plasma spray processing and laser re-melting. After laser re-melting, the microporosity present in the as-sprayed coating was eliminated, and a dense surface layer was obtained. The microstructure of the laser-remelted layer exhibits an epitaxial growth of columnar dendrites, which originate from the crystals of the spray coating. The presence of a continuous epitaxial growth of columnar HEA dendrites in the laser re-melted layer was analyzed based on the critical stability condition of a planar interface. The solidification of a columnar dendrite structure of the HEA alloy in the laser-remelted layer was analyzed based on the Kurz-Giovanola-Trivedi model and Hunt's criterion, with modifications for a multi-component alloy.

AB - An AlCoCrCuFeNi high-entropy alloy (HEA) coating was fabricated on a pure magnesium substrate using a two-step method, involving plasma spray processing and laser re-melting. After laser re-melting, the microporosity present in the as-sprayed coating was eliminated, and a dense surface layer was obtained. The microstructure of the laser-remelted layer exhibits an epitaxial growth of columnar dendrites, which originate from the crystals of the spray coating. The presence of a continuous epitaxial growth of columnar HEA dendrites in the laser re-melted layer was analyzed based on the critical stability condition of a planar interface. The solidification of a columnar dendrite structure of the HEA alloy in the laser-remelted layer was analyzed based on the Kurz-Giovanola-Trivedi model and Hunt's criterion, with modifications for a multi-component alloy.

KW - Columnar-to-equiaxed transition

KW - Epitaxial growth

KW - High entropy alloy

KW - Laser melting

KW - Plasma spray

UR - http://www.scopus.com/inward/record.url?scp=84880938066&partnerID=8YFLogxK

U2 - 10.3390/e15072833

DO - 10.3390/e15072833

M3 - Journal article

SN - 1099-4300

VL - 15

SP - 2833

EP - 2845

JO - Entropy

JF - Entropy

IS - 7

ER -

Microstructure of laser re-melted AlCoCrCuFeNi high entropy alloy coatings produced by plasma spraying

Abstract

Keywords

ASJC Scopus subject areas

More information

Other files and links

Fingerprint

Cite this