DETECTING SMALL FATIGUE CRACKS BY ACOUSTIC MICROSCOPY

— The acoustic microscope has shown great potential for use in fatigue experiments. A comparison between acoustic and optical images of fatigued Aluminium Lithium alloy specimens shows that the acoustic microscope has the ability to monitor very small cracks. Since it is easy (a) to find cracks and...

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Bibliographic Details
Published in:Fatigue & fracture of engineering materials & structures 1993-12, Vol.16 (12), p.1329-1337
Main Authors: Pan, J. Z., Jenkins, P. J., de los Rios, E. R., Miller, K. J.
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Fatigue
Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology
Metals. Metallurgy
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Summary:— The acoustic microscope has shown great potential for use in fatigue experiments. A comparison between acoustic and optical images of fatigued Aluminium Lithium alloy specimens shows that the acoustic microscope has the ability to monitor very small cracks. Since it is easy (a) to find cracks and to locate their tips, (b) to detect damage ahead of a crack tip, (c) to distinguish cracks from slip bands and (d) to monitor the coalescence of cracks, the acoustic microscope can now be used with increasing confidence for obtaining data and understanding the mechanisms involved in metal fatigue.
ISSN:8756-758X
1460-2695
DOI:10.1111/j.1460-2695.1993.tb00742.x