Key Factors and Applications of Cavitation Peening
Author: Hitoshi Soyama, Department of Finemechanics, Tohoku University Japan
Source: Int. Journ. of Peening Science and Technology, Vol. 1, pp. 3–60
Doc ID: 2018010
Year of Publication: 2018
Abstract:
The impacts generated when cavitation bubbles collapse can be used for
the mechanical treatment of surfaces in the same way as shot peening. A
peening method that uses cavitation impacts is called "cavitation peening".
In the present review, the principles of cavitation peening are
explained in order to illustrate the difference between cavitation peening
and water jet peening. The key factors in cavitation peening, such as the
type of cavitating jet, the standoff distance, the nozzle geometry, the cavitation number, the processing speed, the nozzle throat diameter, the
injection pressure and the tank pressure are shown with experimental
results. A semi-empirical equations to predict the peening intensity for a
given nozzle and given operating conditions is proposed. The results of
practical applications of cavitation peening, such as improving the fatigue
strength of a material or suppressing hydrogen embrittlement, are also
shown and compared with the results from shot peening.
Keywords: cavitation peening; water jet peening; shot peening; fatigue strength; residual stress; cavitating jet; pulse laser
Related YouTube video: "Fundamentals of Cavitation Peening, Tohoku University"
| Download PDF |
---|