Tables1and2showthechemicalcompositionsoftheAlCoCrFeNiCu(Cu-based)andAlTiCrFeCoNi(Ti-based)highentropyalloys(16.6at.%)powdermixturesofAl,Co,Cr,Fe,Ni,CuandAl,Ti,Cr,Fe,Co,Niwithpuritiesabove99.9%.ThepowderswerecommerciallysuppliedbyF.JBrodmann&CO.,L.L.C,USA,andtheywereusedas-receivedwithoutmodification.Priortocoating,theA301steelbaseplatesweresandblastedtoincreaseabsorptivityofthelaserbeamandminimizereflectionofthelaserradiation;thisimprovesthebondingstrengthbetweeneachalloyandthesubstrate.Aftersandblasting,thesurfaceofthesubstratewascleanedwithacetoneandairdriedpriortolaserdepositiontoremovecontaminants.Table1:ChemicalcompositionofAlCoCrFeNiCuHEAinatomicpercentage