Growth Morphology of CuMg2 in Laser Forming of AlCoCrCuFeNi Coating on Mg

DOI

10.2991/icmea-17.2018.37How to use a DOI?

Keywords

high-entropy alloy; laser cladding; coatings

Abstract

The AlCoCrCuFeNi high-entropy alloy coating was fabricated on pure magnesium by means of laser cladding using a direct blown powder method. The formed coating is composed of two different layers, i.e., a lower composite layer consisting of some partially melted HEA particles in a mixture of Mg and a top HEA coating. Also, some Cu was rejected into the substrate melt during the processing, resulting in the formation of CuMg2 dendrites. Moreover, the dendritic structure of the CuMg2 phase, which shows a faceted interface at low growth rates, is shown to undergo a transition from a faceted to non-faceted interface at relatively higher growth velocities. The change in solidification behavior of the formed CuMg2 phase is likely to be due to the undercooling increase resulting from the solidification velocity increasing.

Copyright

© 2018, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Guanghui Meng
AU  - Xiaoting Liu
AU  - Jun Qiu
AU  - Bo Wang
AU  - Kun Zhao
PY  - 2018/02
DA  - 2018/02
TI  - Growth Morphology of CuMg2 in Laser Forming of AlCoCrCuFeNi Coating on Mg
BT  - Proceedings of the 4th Annual International Conference on Material Engineering and Application (ICMEA 2017)
PB  - Atlantis Press
SP  - 162
EP  - 165
SN  - 2352-5401
UR  - https://doi.org/10.2991/icmea-17.2018.37
DO  - 10.2991/icmea-17.2018.37
ID  - Meng2018/02
ER  -