Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/25043
Title: Microstructure of laser re-melted AlCoCrCuFeNi high entropy alloy coatings produced by plasma spraying
Authors: Yue, TM 
Xie, H
Lin, X
Yang, H
Meng, G
Keywords: Columnar-to-equiaxed transition
Epitaxial growth
High entropy alloy
Laser melting
Plasma spray
Issue Date: 2013
Publisher: Mdpi Ag
Source: Entropy, 2013, v. 15, no. 7, p. 2833-2845 How to cite?
Journal: Entropy 
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.
URI: http://hdl.handle.net/10397/25043
ISSN: 1099-4300
DOI: 10.3390/e15072833
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