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Under certain conditions, martensite transformation splits into different and successive stages identified by high resolution dilatometry. The experimental results of this study show that, in the absence of carbide precipitation, this phenomenon is related to concentration gradients in the austenite produced by the dissolution of carbides during heating.
This article outlines the use of dilatometry in solid-solid phase transformation research in steel. It describes how dilatometric data are interpreted, with an emphasis on continuous heating and cooling transformation diagrams. These diagrams show the microstructural constituents that result from given heating and cooling conditions, and are an invaluable tool for the metallurgist in characterizing...
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