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Open AccessArticle

Laser Cladding of Al0.5CoCrCuFeNiSi High Entropy Alloy Coating without and with Yttria Addition on H13 Steel

by Jingda Liu 1,2, Yuxin Guan 1,2, Xuechen Xia 1,2, Pai Peng 1,2, Qifeng Ding 1,2 and Xiaotao Liu 1,2,*
1
The Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110819, Liaoning, China
2
School of Materials Science and Engineering, Northeastern University, Shenyang 110004, Liaoning, China
*
Author to whom correspondence should be addressed.
Crystals 2020, 10(4), 320; https://doi.org/10.3390/cryst10040320
Received: 24 February 2020 / Revised: 5 April 2020 / Accepted: 9 April 2020 / Published: 20 April 2020
(This article belongs to the Special Issue Development of High Entropy Alloys)
Al0.5CoCrCuFeNiSi high entropy alloy coating without and with a 1 wt.% Y2O3 addition was fabricated by laser cladding technique on H13 substrate. The results showed that the laser cladding coatings without and with Y2O3 addition consist of a mixture of body centered cubic (BCC) dendrites and face centered cubic (FCC) interdendrites. With the addition of Y2O3, the peaks of BCC dendrites in the coating shifted to leftwards, which is caused by the distortion of lattice due to the dissolution of Y with larger atomic radius. There exist cracks and porosities in the coating without Y2O3 addition. With Y2O3 addition, the cracks and porosities in the laser cladding coating were inhibited greatly. In addition, the microstructure of the coating with Y2O3 addition was refined due to the improving of the ratio of nucleation. The enhancement of properties, such as hardness, wear resistance and corrosion resistance, of the coating with Y2O3 addition came from the inhibition of cracks and porosities and the refinement of microstructure. View Full-Text
Keywords: high entropy alloys; laser cladding; hardness; wear resistance; corrosion resistance high entropy alloys; laser cladding; hardness; wear resistance; corrosion resistance
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Liu, J.; Guan, Y.; Xia, X.; Peng, P.; Ding, Q.; Liu, X. Laser Cladding of Al0.5CoCrCuFeNiSi High Entropy Alloy Coating without and with Yttria Addition on H13 Steel. Crystals 2020, 10, 320.

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