Irreproducibility of acoustic emission under cyclic irradiation of solids by an infrared laser pulse


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Abstract

Acoustic emission (AE) caused by a stress wave in solid material samples with various thermophysical properties, i.e., copper, aluminum, and glass upon exposure to СO2 laser pulses is studied. It is found that the general AE picture (the AE signal arrival time, its amplitude, and others) is not reproduced during repeated experiments following one after another, which indicates irreversible local changes occurred in the material structure. The effect of the critical material energy density on the AE pattern during the laser exposure is demonstrated.

About the authors

S. D. Zotov

Lebedev Physical Institute

Author for correspondence.
Email: zotov@sci.lebedev.ru
Russian Federation, Leninskii pr. 53, Moscow, 119991

A. A. Kuznetsov

Lebedev Physical Institute

Email: zotov@sci.lebedev.ru
Russian Federation, Leninskii pr. 53, Moscow, 119991

A. A. Lebedev

Lebedev Physical Institute

Email: zotov@sci.lebedev.ru
Russian Federation, Leninskii pr. 53, Moscow, 119991

E. N. Lotkova

Lebedev Physical Institute

Email: zotov@sci.lebedev.ru
Russian Federation, Leninskii pr. 53, Moscow, 119991

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