Abstract
The microstructure and performance of high-entropy alloys AlxFeCuCoNiCrTi (x = 0, 0·5, 1·0,1.5.2·0) with different aluminium contents had been studied. The alloy ingots of AlxFeCuCoNiCrTi were prepared under the protection of argon by vacuum arc melting. OM (Optical microscopic), EMPA (Electron microprobe analysis) and X-ray diffractometer were used for the Microstructure and Phases of the alloy. Microhardness tester (HVS-100), electrochemical workstation (LK2005) and multifunctional friction wear testing machine (CETR-UMT-3MO) were used for the performance of the alloys. The results showed that (1) the alloys in this paper were typically dendritic structure, and form simple phase structure, consisted of fcc and bcc; (2) composition segregation (especially Cu segregation) existed in the alloys and that adequate amount of Al alleviated the segregation of Cu; (3) the appropriate addition of Al can improve the hardness, wear resistance and corrosion resistance.
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