Influence of annealing treatment on the microstructure and mechanical performance of cold sprayed 304 stainless steel coating

► We studied influence of annealing treatment on microstructure and mechanical property of cold sprayed 304SS coatings. ► Annealing treatment changes the anisotropy microstructure of the as-sprayed coating to a uniform equiaxed grain microstructure. ► Annealing treatment changes the weakly mechanical bonded interfaces to metallurgical bonding. ► Annealing treatment significantly increased the tensile strength of the coatings from 67 MPa to 357 MPa. ► Annealing treatment changes the coatings mechanical performance from brittle type to plastic type.