Temperaturerhöhung und elektrische aufladung beim stoss einer stahlkugel gegen eine stahlplatte

An analysis of solid particle erosion mechanisms

“…This kind of evidence cannot be accepted as proving that melting is a dominant mechanism of erosion. In support of the theory Neilson and Gilchrist (1968) and Uetz and Gommel (1966) have measured a rise in the temperature of a target during erosion.…”

Energy absorbed by elastic waves during plastic impact

“…This type of quasi-static analysis would be expected to be valid provided that the impact duration is long compared with the time taken for a longitudinal elastic wave to traverse the impinging sphere (Davis and Hunter 1960). The contact times reported by Uetz and Gommel (1966) suggest that this is indeed the case for the impact of hard steel spheres on steel at velocities up to at least 70 m s-1. Equation ( 14) will give a valid estimate of the elastic wave energy for any impact velocity small compared with the elastic wave velocity, for which the assumptions inherent in $2.2 are reasonable.…”

“…The fraction of the kinetic energy dissipated in elastic waves is small. For the impact of hard steel spheres on mild steel at about 70 m s-1, the coefficient of restitution is about 0.4 (Uetz and Gommel 1966). In this case, with appropriate values taken for the variables in (14), X-3%.…”

A model for the erosion of metals by spherical particles at normal incidence

“…Microscopic examination of the subsurface deformation around indentations formed by impact at velocities typical of erosion (25)(26)(27) as well as analyses of the quasi-static indentation process (24,28,29) indicate that the volume of metal which is plastically deformed around an indentation is comparable with the volume of the indentation. Bear in mind that a will probably depend on the indentation geometry, the impact velocity and the target material.…”