SEM observation of the vibratory cavitation-fracture mode during the incubation period and the small roughness effect

Shemy Mohamed Ahmed, Kazuo Hokkirigawa, Risaburo Oba, Kinya Kikuchi

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)298-303
Number of pages6
JournalJSME International Journal, Series 2: Fluids Engineering, Heat Transfer, Power, Combustion, Thermophysical Properties
Volume34
Issue number3
DOIs
Publication statusPublished - 1991

ASJC Scopus subject areas

  • Mechanical Engineering
  • Physical and Theoretical Chemistry
  • Fluid Flow and Transfer Processes

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