title: Time-evolving statistics of cavitation damage on metallic surfaces.
abstract: The statistics of surface damage on polycrystalline aluminium plates caused by acoustic cavitation is studied experimentally as a function of time. Cavitation is shown to produce a uniform distribution of crater-like holes with different depth, area and eccentricity. Most notably, the size distribution of such craters evolves with time from a gamma function into a power law. By contrast, on the surface of a martensitic Cu-Ni-Al crystal cavitation damage generates ramified patterns, reminiscent of a fractal object.
authors.affiliation: Dipartimento di Fisica, Instituto Nazionale per la Fisica della Materia, Universitá di Perugia, I-06123 Perugia, Italy.
authors.forename: P
authors.initials: P
authors.lastname: Diodati
authors.forename: F
authors.initials: F
authors.lastname: Marchesoni
mesh_terms: D000162:Acoustics; D000465:Algorithms; D000535:Aluminum; D003300:Copper; D017709:Fractals; D009532:Nickel; D013010:Sonication / Q000009:adverse effects*; D013997:Time Factors; D014465:Ultrasonics / Q000009:adverse effects*
chemical_list: D003300:Copper; D009532:Nickel; D000535:Aluminum