Vibratory-erosion tests on a typical ductile material, 304 stainless steel, were carried out under a specified condition of uniform cavitation-nuclei-size distributions. We systematically investigated the behavior of fracture modes on a smooth surface one order of magnitude smaller in roughness than the ASTM recommended value, as well as the small roughness effect in the development and/or propagation of cracks and particle fall-off in the second stage of the incubation period by means scanning electron microscope. It is clear that the mode is fatigue and ductile fracture, and also that slight roughness plays an important role in the development and/or propagation of the cracks and also in microscopic removals, which shorten the incubation period.
|ジャーナル||JSME International Journal, Series 2: Fluids Engineering, Heat Transfer, Power, Combustion, Thermophysical Properties|
|出版ステータス||Published - 1991|
ASJC Scopus subject areas
- Mechanical Engineering
- Physical and Theoretical Chemistry
- Fluid Flow and Transfer Processes