Transactions of the INDIAN CERAMIC SOCIETY Vol. 52 1993
Crack Growth in Castable Refractory due to Thermal Shock
Fatigue : An Acousto-Ultrasonic Study
A. C. DAs, S. MuKHERJEE, K. CHAUDHURY, S. K. NIYOGI AND K. K. PHANI
Pages : 139-145
DOI : 10.1080/0371750X.1993.10804590
Abstract
Thermal shock fatigue crack growth in an alumino-silicate
castable refractory has been studied using the non-destructive
method of acousto-ultrasonic signal analysis. Acousto-ultrasonic
signal parameters supported by strength measurement
studies and microscopic observations, indicated initiation,
growth and interlinking of microcracks with increasing cycles
of thermal shock fatigue. Equations have been proposed to
monitor degradation of strength from acousto-ultrasonic
measurements. The study reveals that acousto-ultrasonics is a
very useful approach for non-destructive qualitative as well
as quantitative evaluation of thermal shock damage in
refractories.