Choudhury, K and Phani, Kalyan Kumar (1994) Thermal shock damage and thermal fatigue of glass- an acoustoultrasonic study. Materials Evaluation, 52 (12). pp. 1389-1393. ISSN 0025-5327

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Nondestructive assessment of thermal shock damage in glass and ceramics is of considerable importance to prevent catastrophic failure of these these materials in full scale engineering applications. Acoustoultrasonics, a relatively new nondestructive testing technique, has been used to evaluate thermal shock damage and thermal fatigue of glass. The study is based on quantification of the acoustoultrasonic signal by using the signal analysis technique based on power spectral moments. It has been shown that variation of zeroth power spectral moments with quenching temperature is similar to that of strength with quenching temperature and it provides a quantitative measure of thermal shock resistance in terms of a critical quench temperature differential Delta T-c required for onset of rapid fracture. Tire magnitude of the moment also provides a qualitative assessment of reduction in strength properties. With repeated quenching moment values decrease exponentially and the amplitudes of major peeks in the frequency spectrum of the signal provide a qualitative assessment of the severity of damage in the material.

Item Type: Article
Subjects: Glass > Glass Properties
Depositing User: Bidhan Chaudhuri
Date Deposited: 07 Aug 2013 07:07
Last Modified: 07 Aug 2013 07:07

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