Investigation of microstructure and wear resistance of laser-clad CoCrNiTi and CrFeNiTi medium-entropy alloy coatings on Ti sheet

•Two laser-clad MEACs (CoCrNiTi and CrFeNiTi) were successfully prepared on pure Ti sheet.•Both MEACs are mainly comprised of BCC phase along with interdendritic Cr2Ti Laves phase.•Hardness and wear resistance of both MEACs are markedly improved compared to the substrate.•Their superior properties are related to solid-solution, short-range order, grain refinement and the Laves phase.