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 journalArticle

3 Citations (Scopus)

Abstract

Vibratory-erosion tests on a typical ductile material, 304 stainless steel, were carried out under a specified condition of uniform sitation-nuclei-size distribution. We systematically investigated the behavior of the fracture mode on a smooth surface one figure smaller in roughness than the ASTM recommended value, as well as small roughness effects in the development and/or propagation of cracks and particle fall-off, in the second stage of the incubation period, by means of a scanning electron microscope. It is clear that the mode is fatigue and ductile fracture, and also that small roughness plays an important role in development and/or propagation of the cracks and also in microscopic removals, which shorten the incubation period.

Original languageEnglish
Pages (from-to)1876-1882
Number of pages7
JournalTransactions of the Japan Society of Mechanical Engineers Series B
Volume56
Issue number527
DOIs
Publication statusPublished - 1990 Jan 1
Externally publishedYes

Keywords

  • Bubble
  • Cavitation
  • Erosion
  • Multi-phase Flow
  • Roughness
  • Turbomachinery

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering

Fingerprint Dive into the research topics of 'SEM Observation of the Vibratory Cavitation-Fracture Mode During the Incubation Period and the Small Roughness Effect'. Together they form a unique fingerprint.

  • Cite this