Effect of laser heating on microstructure and deposition properties of cold sprayed SS304L

This paper investigates the effects of laser heated cold spray on microstructure and mechanical properties sprayed 304L stainless steel (SS304L). In this study, three samples were made by depositing SS304L powder onto substrates using (CS) with a nitrogen carrier gas. A was used to heat surface two deposits after 750 ℃ 950 ℃, resulting studied. Electron backscatter diffraction (EBSD) X-ray line profile analysis (XLPA) determine dislocation density in depositions both near deposition interface substrate. Vickers microhardness measure hardness material as function depth samples. It found that heating caused recrystallization ultimately grain growth, which correlated significant decrease reduction for deposits. The measured be strongly related inverse square root size EBSD when accounting ultrafine grains at prior-particle interfaces. points ability effective microstructural manipulation materials.