Observation of microstructural deformation behavior in metals caused by cavitation impact

Shinobu Sugasawa, Susumu Uematsu, Shigeru Akiyama

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Abstract

To clarify the erosion mechanism of cavitation, we pay attention to the internal changes in grains caused by cavitation impact. The vibratory cavitation test based on ASTM G32 was carried out and the cross section of directly under the eroded surface of a specimen was observed using the electron backscattering diffraction (EBSD) technique. The situations of grain boundaries and the changes in the crystal orientations of grains in aluminum, copper, and steel were analyzed. As a result, the following observations were made. Cavitation impact causes grain refining of sub-micrometer order near the eroded surface. There exist small changes in crystal orientation in grains. In steel, grain boundaries were generated on the eroded surface and were growing inward in the grain. Finally, the mechanism of internal deformation of grains caused by cavitation impact was discussed.

Original languageEnglish
Article number07HE03
JournalJapanese Journal of Applied Physics
Volume50
Issue number7 PART 2
DOIs
Publication statusPublished - 2011 Jul 1

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ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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