Decoding variant for dilatometric measurements of metal samples heating and cooling

Abstract

Dilatometric measurements in the form of sample sizes registration with temperature changes are widely used in the practice of physical materials science. In recent decades, the hardware component of these measurements has substantially changed with a practically unchanged version of their use as applied to the characteristics of various phase transformations. The basic point, in this case, is the identification of the critical points temperature for the 'start/finish' transformations based on the analysis of dilatograms deviations from a tangents carried out in the temperature intervals near the break observed on the obtained experimental curves. However, in most cases, this information has a framework character due to the presence of deficiencies in the critical points temperatures determining. In some cases, to compensate for these shortcomings, results of the changes analysis in the first derivative of dilatometric curves are additionally used. A series of works carried out by the authors is studying the features at changing the temperature coefficient of linear expansion true values. An algorithm for obtaining this spectrum is prescribed. © Published under licence by IOP Publishing Ltd.