High temperature wear performance of laser-cladded FeNiCoAlCu high-entropy alloy coating

Abstract High temperature wear is a common phenomenon, but in the field of high-entropy alloys, there are limited literatures on the wear behavior of laser-cladded high-entropy alloy coatings at elevated temperature. In this work, the wear performance of laser-cladded FeNiCoAlCu high-entropy alloy coating at room temperature, 200 °C, 400 °C, 600 °C and 800 °C were investigated in detail. The phase constitution and microstructure of laser-cladded FeNiCoAlCu high-entropy alloy coating were analyzed by XRD, SEM, EPMA and TEM. The results show that the synthesized FeNiCoAlCu high-entropy alloy coating is composed of FCC and BCC solid solution phases with a typical uniform dendrite microstructure, and the phase constitution of inter-dendritic region and dendritic region are Fe-rich BCC and Cu-rich FCC solid solution, respectively. The high-temperature XRD and DSC results indicate that the laser-cladded FeNiCoAlCu high-entropy alloy coating has a good thermal-stability below 780 °C. The laser-cladded FeNiCoAlCu high-entropy alloy coating also has a good wear performance at high temperature, which is mainly attributed to the formation of oxide films on the surface of the coating. The wear mechanisms are dominated by abrasive wear and oxidative wear.

[1]  J. Yeh,et al.  Effects of substrate bias on the structure and mechanical properties of (Al1.5CrNb0.5Si0.5Ti)Nx coatings , 2012 .

[2]  Shao-Hua Wu,et al.  Investigation of laser cladding high temperature anti-wear composite coatings on Ti6Al4V alloy with the addition of self-lubricant CaF2 , 2014 .

[3]  Xing-wu Qiu,et al.  Microstructure and properties of Al2CrFeCoCuTiNix high-entropy alloys prepared by laser cladding , 2013 .

[4]  J. Rabalais,et al.  Surface alteration of graphite, graphite monofluoride and teflon by interaction with Ar+ and Xe+ beams , 1978 .

[5]  Yusheng Shi,et al.  Microstructural Modification of Laser-Deposited High-Entropy CrFeCoNiMoWC Alloy by Friction Stir Processing: Nanograin Formation and Deformation Mechanism , 2017, Metallurgical and Materials Transactions A.

[6]  Jiesheng Han,et al.  Microstructure, mechanical properties and tribological performance of CoCrFeNi high entropy alloy matrix self-lubricating composite , 2017 .

[7]  L. Zhou,et al.  Microstructure and high-temperature wear mechanism of laser cladded CoCrBFeNiSi high-entropy alloy amorphous coating , 2018 .

[8]  J. Hosson,et al.  Additive Manufacturing of High-Entropy Alloys by Laser Processing , 2016, JOM.

[9]  Hui Jiang,et al.  Phase Evolution and Properties of Al2CrFeNiMox High-Entropy Alloys Coatings by Laser Cladding , 2015, Journal of Thermal Spray Technology.

[10]  Xin Lin,et al.  Laser surface forming of AlCoCrCuFeNi particle reinforced AZ91D matrix composites , 2015 .

[11]  Jinghao Li,et al.  Synthesis and characterization of refractory TiZrNbWMo high-entropy alloy coating by laser cladding , 2017 .

[12]  Xin Lin,et al.  Microstructure of Laser Re-Melted AlCoCrCuFeNi High Entropy Alloy Coatings Produced by Plasma Spraying , 2013, Entropy.

[13]  Rui Vilar,et al.  Thermal stability and oxidation resistance of laser clad TiVCrAlSi high entropy alloy coatings on Ti–6Al–4V alloy , 2011 .

[14]  A. Dong,et al.  Microstructure and dry sliding wear behavior of laser clad AlCrNiSiTi multi-principal element alloy coatings , 2017, Rare Metals.

[15]  Zhiqiang Cao,et al.  Microstructure Evolution and Wear Behavior of the Laser Cladded CoFeNi2V0.5Nb0.75 and CoFeNi2V0.5Nb High-Entropy Alloy Coatings , 2016, Journal of Thermal Spray Technology.

[16]  Rui Vilar,et al.  Dry sliding wear behavior of laser clad TiVCrAlSi high entropy alloy coatings on Ti–6Al–4V substrate , 2012 .

[17]  Jun Li,et al.  High-temperature wear and oxidation behaviors of TiNi/Ti 2 Ni matrix composite coatings with TaC addition prepared on Ti6Al4V by laser cladding , 2017 .

[18]  J. Yi,et al.  Synthesis and characterization of FeCoCrAlCu high-entropy alloy coating by laser surface alloying , 2015 .

[19]  K. Dahmen,et al.  Microstructures and properties of high-entropy alloys , 2014 .

[20]  Oleksandr Viacheslavovych Bondar,et al.  Microstructure, physical and chemical properties of nanostructured (Ti–Hf–Zr–V–Nb)N coatings under different deposition conditions , 2014 .

[21]  S. Zhang,et al.  Phase evolution and properties in laser surface alloying of FeCoCrAlCuNix high-entropy alloy on copper substrate , 2017 .

[22]  G. Jin,et al.  Design and microstructure characterization of FeCoNiAlCu high-entropy alloy coating by plasma cladding: In comparison with thermodynamic calculation , 2017 .

[23]  Jiangbo Cheng,et al.  Evolution of microstructure and mechanical properties of in situ synthesized TiC–TiB2/CoCrCuFeNi high entropy alloy coatings , 2015 .

[24]  Hui Zhang,et al.  Synthesis and characterization of FeCoNiCrCu high-entropy alloy coating by laser cladding , 2011 .

[25]  X. Liang,et al.  Effect of Nb addition on the structure and mechanical behaviors of CoCrCuFeNi high-entropy alloy coatings , 2014 .