Evaluation of microscopic plastic deformation of polycrystalline aluminum by laser-scanning microscope

Hualin Song, Takeji Abe, Ichiro Shimizu, Naoya Tada, Tashiyuki Torii

Research output: Contribution to journalArticlepeer-review


The microscopic plastic deformation behavior of aluminum sheet during uniaxial tension is experimentally investigated by a confocal laser-scanning microscope. The surface roughening is closely related to the inhomogeneity of polycrystalline metals, that is, to the inhomogeneous plastic deformation of respective grains. In order to clarify the deformation behavior of polycrystalline metals, new measuring methods and 4 types of strains of grains are introduced and inhomogeneous of strain of grains are investigated. Digital image processing technique is applied to the surface image taken by the CCD camera for measurement. It is shown that the grain-area strain, the maximum dimension and mean dimension strain, the grain-boundary length strain and the standard deviations of these parameters statistically increase in proportion to the applied strain. Discussions are made on the differences between these measuring methods of strain parameters of grains, variations of measured statistical results including comparison with equilateral polygon model during tensile deformation.

Original languageEnglish
Pages (from-to)473-480
Number of pages8
JournalZairyo/Journal of the Society of Materials Science, Japan
Issue number5
Publication statusPublished - May 2004


  • Laser-scanning microscope
  • Plasticity
  • Polycrystalline aluminum
  • Surface roughness
  • Tension

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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