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Article

Ultrasonic Cavitation Erosion Behavior of AlCoCrxCuFe High Entropy Alloy Coatings Synthesized by Laser Cladding

School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471003, China
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Materials 2020, 13(18), 4067; https://doi.org/10.3390/ma13184067
Received: 4 August 2020 / Revised: 8 September 2020 / Accepted: 10 September 2020 / Published: 13 September 2020
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 AlCoCrxCuFe (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 AlCoCrxCuFe 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. AlCoCrxCuFe HECs with the lowest chromium content (AlCoCr0.5CuFe) showed the best cavitation erosion resistance among all samples. The cavitation resistance of AlCoCrxCuFe HECs has good correlation with the mechanical parameter Hn3/Er2 (Hn is nanohardness, Er 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. View Full-Text
Keywords: ultrasonic cavitation erosion; high entropy alloy coatings; AlCoCrxCuFe; laser cladding ultrasonic cavitation erosion; high entropy alloy coatings; AlCoCrxCuFe; laser cladding
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MDPI and ACS Style

Yin, D.; Liang, G.; Fan, S.; Li, S. Ultrasonic Cavitation Erosion Behavior of AlCoCrxCuFe High Entropy Alloy Coatings Synthesized by Laser Cladding. Materials 2020, 13, 4067. https://doi.org/10.3390/ma13184067

AMA Style

Yin D, Liang G, Fan S, Li S. Ultrasonic Cavitation Erosion Behavior of AlCoCrxCuFe High Entropy Alloy Coatings Synthesized by Laser Cladding. Materials. 2020; 13(18):4067. https://doi.org/10.3390/ma13184067

Chicago/Turabian Style

Yin, Danqing, Guangbing Liang, Shuai Fan, and Shanxin Li. 2020. "Ultrasonic Cavitation Erosion Behavior of AlCoCrxCuFe High Entropy Alloy Coatings Synthesized by Laser Cladding" Materials 13, no. 18: 4067. https://doi.org/10.3390/ma13184067

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