Abstract
A scanning acoustic microscope (SAM) has been built, and its main features are described. Acoustical imaging of the grain structures in elastically isotropic 99.995% pure aluminium, Al-2.5% Mg alloy, and of a composite structure of Al + SiC particles has been performed using this instrument. We obtain surprisingly good contrast and therefore good imaging in both pure aluminium and Al-2.5% Mg. The fact that we obtain good contrast even in elastically isotropic materials like aluminium and Al-2.5% Mg shows that SAM imaging is very sensitive to mechanical near-surface properties.
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On leave from Department of Physics, Indian Institute of Science, Bangalore 560012, India
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Fossheim, K., Bye, T., Sathish, S. et al. Acoustic scanning microscopy of grain structure in isotropic solids: pure aluminium and Al-2.5% Mg alloy. J Mater Sci 23, 1748–1751 (1988). https://doi.org/10.1007/BF01115717
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DOI: https://doi.org/10.1007/BF01115717