关键词:
High-entropy alloys
摘要:
Al1.8CrCuFeNi2 high entropy alloy composites (HEACs) with different GNP contents were prepared by selective laser melting (SLM). The grain size, microstructure, hardness, compression properties and wear resistance of the GNP/Al1.8CrCuFeNi2 HEACs were investigated. The results showed that after adding GNP, the phase structure of the HEACs was simple BCC phase without other precipitated phase. When 0.8wt.% GNP was added to the Al1.8CrCuFeNi2 HEA, the average grain size decreased by 30.3% (cross section, CS) and 45.7% (longitudinal section, LS), respectively. As the GNP content increased from 0wt.% to 0.8wt.%, the proportion of high-angle grain boundaries (HAGBs) was enhanced, and the texture intensity decreased. The hardness of the HEACs increased gradually, and the maximum values were 972 HV (CS, 0.8wt.%) and 1010 HV (LS, 0.8wt.%), respectively. The wear loss decreased, and the wear resistance was enhanced gradually. The compressive strength and compressive strain initially increased and then decreased, when the GNP content was 0.4wt.%, the maximum values were 1534 MPa and 3.8%, respectively. © 2023, The Authors. All rights reserved.