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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 |
Issue Date: | 2013 | Source: | Entropy, July 2013, v. 15, no. 7, p. 2833-2845 | 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 |
Publisher: | Mdpi Ag | Journal: | Entropy | ISSN: | 1099-4300 | DOI: | 10.3390/e15072833 | Rights: | © 2013 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/). The following publication Yue, T. M., Xie, H., Lin, X., Yang, H., & Meng, G. (2013). Microstructure of laser re-melted AlCoCrCuFeNi high entropy alloy coatings produced by plasma spraying. Entropy, 15(7), (Suppl. ), 2833-2845 is available athttps://dx.doi.org/10.3390/e15072833 |
Appears in Collections: | Journal/Magazine Article |
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