The effect of elastic anisotropy on contrast in the scanning acoustic microscope

Michael Geoffrey Somekh, G. A.D. Briggss, C. Ilett

Research output: Journal article publicationJournal articleAcademic researchpeer-review

47 Citations (Scopus)


The contrast obtained with polycrystalline specimens in the scanning acoustic microscope is computed by taking account of the anisotropic stiffness tensor. The resulting variation of signal with defocus is fundamentally different from that which could be obtained with an isotropic material regardless of the values of the elastic properties. In many cases this results largely from the excitation of pseudo-surface waves which effect the response of the microscope in a similar manner to ‘leaky’ Rayleigh waves. The reasons why some materials fail to give good acoustic images of grain structure are discussed.
Original languageEnglish
Pages (from-to)179-204
Number of pages26
JournalPhilosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties
Issue number2
Publication statusPublished - 1 Jan 1984
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • General Materials Science
  • Condensed Matter Physics
  • Physics and Astronomy (miscellaneous)
  • Metals and Alloys


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