Scanning electron microscopy observation on the incubation period of vibratory cavitation erosion

S. M. Ahmed, K. Hokkirigawa, Y. Ito, R. Oba

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

The behaviour of the vibratory cavitation erosion on typical machinery material, SUS 304 stainless steel, is investigated using a scanning electron microscope and a profilometer. The tests are carried out under conditions of uniform cavitation nuclei size distribution. It is observed that the polishing Unes act as weak points for the formation of pits. The diameter and the shape of these pits do not change with the test time (t < 20 min). The rate of formation of pits with test time is high initially but decreases after t = 15 min. It is also observed that most of the test surface is locally deformed plastically from the beginning of the vibration, resulting in characteristically wavy surface undulations. As the time passes, these undulations do not change in shape and number but they do change in width as well as in height. In addition, the direction of undulation greatly affects the roughness on the eroded surface.

Original languageEnglish
Pages (from-to)303-314
Number of pages12
JournalWEAR
Volume142
Issue number2
DOIs
Publication statusPublished - 1991 Mar 1

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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