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Photoacoustic Method for Obtaining Strength Characteristics of Thin Films

Published online by Cambridge University Press:  21 February 2011

I. A. Konovalov  and
S. K. Sklyarenko
I. A. Konovalov
Affiliation:
Institute of Materials Science, Krzhizhanovsky St. 3, Kiev, 252180, Ukraine
S. K. Sklyarenko
Affiliation:
Institute of Physics, Department of Radiation Detectors, Pr. Nauki 46, Kiev, 252028, Ukraine
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Abstract

Local thermoelastic stresses appear in the surface layers of materials under pulsed laser irradiation. Changes in the amplitude and shape of acoustic signals with laser pulse intensity were studied. Changes corresponding to a transition from purely elastic to elastoplastic deformation in the zone of interaction between the radiation and surface have been registered. Measurement of the absorbed energy radiation which causes these threshold phenomena makes it possible to estimate the yield limit for plastic materials and strength limit for brittle ones.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 356: Symposium B2 – Thin Films: Stresses and Mechanical Properties V , 1994 , 621
Copyright
Copyright © Materials Research Society 1995

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References

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