抄録
A large number of tiny particles hit the specimen to improve the mechanical properties of treated materials in Fine Particle Peening (FPP) process. The induced surface modification is influenced by many parameters such as material properties, particle size, particle amount, air pressure and so on. Especially, it is well known that particle velocity significantly influences the results of surface modification. Thus, we focused on the particle velocity and measured it by a high-speed camera. Also, we developed the model of particle motion by considering the effect of jet flow and calculated the particle velocity after spouting from the nozzle. Then, we compared the experimental results with the calculated results and those agreed well each other. It is concluded that the particle velocity can be estimated by our proposed model and it is helpful information when one decides the process condition on FPP treatment.
