Tribological Studies on AlCrFeCuCoNi High Entropy Alloy Surface Coatedon Ti-6Al-4V Using Plasma Transferred Arc Technique

Archives of Metallurgy and Materials

article

G. Prabu¹  Muthukannan Duraiselvam¹ 

[1] National Institute of Technology, Department of Production Engineering

关键词: Titanium alloy;    High entropy alloy;    Plasma transferred arc (PTA);    Alloying;    Wear mechanism;   

DOI  :  10.24425/amm.2022.137772

学科分类：物理（综合）

来源: Akademia Gorniczo-Hutnicza im. Stanislawa Staszica / University of Mining and Metallurgy

【 摘 要 】

AlCrFeCuCoNi high entropy particles were alloyed on Ti-6Al-4V surface using Plasma transferred arc (PTA) process. PTAalloyed surfaces were investigated for their phase formation, microhardness improvement and wear behaviour. The various wearmechanism and their corresponding surface roughness were studied. The results revealed that the dual phase of BCC and FCCmicrostructure along with some intermetallic compounds were grown in the alloyed region through the PTA technique and goodmetallurgical bonding of the alloyed region with the base material were achieved. The PTA alloyed region exhibited a hardness of718 HV0.2 which is 2.2 times higher than the hardness of base material. The PTA alloyed samples showed higher wear resistancedue to the solid solution strengthening as the HEA has high entropy of mixing that leads to the reduction of free energy of thealloyed region. It exhibited better interconnection of the coated material and superior metallurgical bonding to the base material.Frictional heat produced during the wear test has promoted the formation of FeO, Cr2O3, CuO, NiO and Al2O3 oxide film on thePTA alloyed sample. These oxide films act as a barrier between two mating surfaces and improve the tribo performance of the PTAalloyed sample.

【 授权许可】

CC BY-NC