Work Hardening and Potential Difference Mediated Cocrnimocb High-Entropy Alloy Coatings to Synchronously Improving Wear and Corrosion Resistance

Coherent ceramic-reinforced CoCrNiMoCB high-entropy alloy coatings with different cobalt contents were prepared by laser cladding, and an excellent corrosion and wear resistance was achieved. The phases, microstructures, wear, electrochemical, and tribocorrosion performance of the coatings were investigated. Wear tests indicated that the nanocrystalline layer thickness increased with Co added, the deformation mode of the FCC matrix changed from slip bands to dislocation slipping and the ceramics changed from brittle fracture to stacking fault, leading to a higher work hardening depth, further enhancing the wear resistance. The potential difference between the FCC matrix and the ceramics was reduced due to the compositional homogenization ability of Co element, leading to a lower driving force of galvanic corrosion and better corrosion resistance.

Keywords: High-entropy alloy coating, Wear, Corrosion, Laser cladding, Work hardening

Suggested Citation: Suggested Citation

Jiang, Di and Cui, Hongzhi and Lian, Xiaojuan and Song, Xiaojie and Zhao, Xiaofeng and Chen, Hao and Ma, Guoliang and Liu, Feiya and Cui, Zhongyu, Work Hardening and Potential Difference Mediated Cocrnimocb High-Entropy Alloy Coatings to Synchronously Improving Wear and Corrosion Resistance. Available at SSRN: https://ssrn.com/abstract=4165263 or http://dx.doi.org/10.2139/ssrn.4165263