Word Count : 259

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The transformation of austenite to martensite is one of the most important phase transformations in steels and is a classic example of a diffusionless or displacive transformation. Austenite is a face centered cubic phase of iron that is stable at high temperatures. When steel in the austenitic condition is cooled very rapidly, such as by quenching in water or oil, there is not sufficient ____ ______ _________ ___ _____ ____ _________ __________ ________.
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