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Microstructure and properties of CrFeNiAlSiTix high entropy alloy prepared by laser sintering
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    Abstract:

    In order to verify the feasibility of directly preparing high entropy alloy using natural ferrochrome ore powder, Cr, Fe, Ni, Al, Si close to the ferrochrome ore powder was selected as the base element and suppressed into billet after mixed with Ti elements doped with non-equimolar ratio, and CrFeNiAlSiTix (x=0-1.2) high entropy alloy was prepared by laser self-spreading sintering. It was characterized by OM, XRD, SEM and EDS, Vickers microhardness tester and electrochemical workstation, and its phase structure, microstructure,density and porosity, hardness, wear resistance, corrosion resistance and high temperature oxidation properties were analyzed. The results show that with the Ti content, the alloy increases BCC phase and confirms the results of intrinsic parameters.The results show that the Ti content and the experimental parameters are consistent with the experiment. Dendritic tissue decreases, petal-like tissue increases, and elements with strong Ti binding forces are mainly present in dendritic crystals. When x=1.0, the maximum alloy microhardness of 935.62 HV, maximum density of 5.01 g/cm3, porosity of 24.01%, minimum per area wear of 34 mg·cm-2, oxidation rate of 5.92×10-6 mg2·cm-4·s-1, corrosion current of 0.98 μA/cm2, annual corrosion depth of 1.01×10-2 mm/a..

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[ligang, wenying. Microstructure and properties of CrFeNiAlSiTix high entropy alloy prepared by laser sintering[J]. Rare Metal Materials and Engineering,2022,51(5):1681~1689.]
DOI:10.12442/j. issn.1002-185X.20210834

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History
  • Received:September 19,2021
  • Revised:November 19,2021
  • Adopted:January 22,2022
  • Online: June 09,2022
  • Published: May 30,2022