Microstructure and mechanical property of Ti and Ti6Al4V prepared by an in-situ shot peening assisted cold spraying

摘要: Abstract In the current study, for first time, an in-situ shot peening (SP) is introduced into cold spray by mixing large sized stainless steel particles with spraying powders to prepare dense Ti6Al4V (TC4) and commercially pure Ti (CP Ti) deposits. It attempted that via hammering these SP particles, plastic deformation of previously deposited layers could be greatly enhanced thereby porosities can declined. Results show that, as particle proportion increases from 0 70 vol.%, CP TC4 coatings decrease 13.7% 15.3% 0.3% 0.7%, respectively. SEM observations reveal no incorporated coatings. A few (≤ 2.3 vol.%) are observed in due relatively low hardness Ti. Only a slight decline trend deposition efficiency detected increasing content. The results remarkable work hardening. As content Vickers microhardness increase ~ 143 240 HV 0.3 ~ 203 427 HV ,