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Ultrasonic Cavitation Erosion Behavior of AlCoCr(x)CuFe High Entropy Alloy Coatings Synthesized by Laser Cladding

Cavitation corrosion resistant coatings are an excellent solution to the cavitation corrosion problem. High entropy alloys provide a new possibility for cavitation resistant coatings due to their excellent comprehensive performance. Laser cladding was employed to synthesize AlCoCr(x)CuFe (x represen...

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Autores principales: Yin, Danqing, Liang, Guangbing, Fan, Shuai, Li, Shanxin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7560431/
https://www.ncbi.nlm.nih.gov/pubmed/32933214
http://dx.doi.org/10.3390/ma13184067
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author Yin, Danqing
Liang, Guangbing
Fan, Shuai
Li, Shanxin
author_facet Yin, Danqing
Liang, Guangbing
Fan, Shuai
Li, Shanxin
author_sort Yin, Danqing
collection PubMed
description Cavitation corrosion resistant coatings are an excellent solution to the cavitation corrosion problem. High entropy alloys provide a new possibility for cavitation resistant coatings due to their excellent comprehensive performance. Laser cladding was employed to synthesize AlCoCr(x)CuFe (x represents the Cr concentration, x = 0.5, 1.0, 1.5, 2.0) high entropy alloy coatings (HECs) on AISI 304 steel. The phase transformation, microstructure, micro-mechanical properties, and cavitation erosion performance of HECs were studied. Results showed that AlCoCr(x)CuFe HECs were composed of BCC and FCC duplex phase. The microstructure of HECs showed a typical dendritic structure. The composition segregation of interdendrite structures was observed. Cavitation erosion resistance represented by 20 h volume loss was decreased with the increase in Cr content. AlCoCr(x)CuFe HECs with the lowest chromium content (AlCoCr(0.5)CuFe) showed the best cavitation erosion resistance among all samples. The cavitation resistance of AlCoCr(x)CuFe HECs has good correlation with the mechanical parameter [Formula: see text] / [Formula: see text] ([Formula: see text] is nanohardness, [Formula: see text] is elastic modulus) and phase formation parameter δ (δ is atomic radius difference). The surface after 20 h of cavitation erosion testing exposed the dendritic structure of BCC phase, which was caused by the destruction of the interdendrite structure by cavitation impact.
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spelling pubmed-75604312020-10-22 Ultrasonic Cavitation Erosion Behavior of AlCoCr(x)CuFe High Entropy Alloy Coatings Synthesized by Laser Cladding Yin, Danqing Liang, Guangbing Fan, Shuai Li, Shanxin Materials (Basel) Article Cavitation corrosion resistant coatings are an excellent solution to the cavitation corrosion problem. High entropy alloys provide a new possibility for cavitation resistant coatings due to their excellent comprehensive performance. Laser cladding was employed to synthesize AlCoCr(x)CuFe (x represents the Cr concentration, x = 0.5, 1.0, 1.5, 2.0) high entropy alloy coatings (HECs) on AISI 304 steel. The phase transformation, microstructure, micro-mechanical properties, and cavitation erosion performance of HECs were studied. Results showed that AlCoCr(x)CuFe HECs were composed of BCC and FCC duplex phase. The microstructure of HECs showed a typical dendritic structure. The composition segregation of interdendrite structures was observed. Cavitation erosion resistance represented by 20 h volume loss was decreased with the increase in Cr content. AlCoCr(x)CuFe HECs with the lowest chromium content (AlCoCr(0.5)CuFe) showed the best cavitation erosion resistance among all samples. The cavitation resistance of AlCoCr(x)CuFe HECs has good correlation with the mechanical parameter [Formula: see text] / [Formula: see text] ([Formula: see text] is nanohardness, [Formula: see text] is elastic modulus) and phase formation parameter δ (δ is atomic radius difference). The surface after 20 h of cavitation erosion testing exposed the dendritic structure of BCC phase, which was caused by the destruction of the interdendrite structure by cavitation impact. MDPI 2020-09-13 /pmc/articles/PMC7560431/ /pubmed/32933214 http://dx.doi.org/10.3390/ma13184067 Text en © 2020 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 (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Yin, Danqing
Liang, Guangbing
Fan, Shuai
Li, Shanxin
Ultrasonic Cavitation Erosion Behavior of AlCoCr(x)CuFe High Entropy Alloy Coatings Synthesized by Laser Cladding
title Ultrasonic Cavitation Erosion Behavior of AlCoCr(x)CuFe High Entropy Alloy Coatings Synthesized by Laser Cladding
title_full Ultrasonic Cavitation Erosion Behavior of AlCoCr(x)CuFe High Entropy Alloy Coatings Synthesized by Laser Cladding
title_fullStr Ultrasonic Cavitation Erosion Behavior of AlCoCr(x)CuFe High Entropy Alloy Coatings Synthesized by Laser Cladding
title_full_unstemmed Ultrasonic Cavitation Erosion Behavior of AlCoCr(x)CuFe High Entropy Alloy Coatings Synthesized by Laser Cladding
title_short Ultrasonic Cavitation Erosion Behavior of AlCoCr(x)CuFe High Entropy Alloy Coatings Synthesized by Laser Cladding
title_sort ultrasonic cavitation erosion behavior of alcocr(x)cufe high entropy alloy coatings synthesized by laser cladding
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7560431/
https://www.ncbi.nlm.nih.gov/pubmed/32933214
http://dx.doi.org/10.3390/ma13184067
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