Abstract
The change and transition process in transformation kinetics from a nonthermoelastic to a thermoelastic type accompanying an increase in parent phase order in Fe-Pt alloys near the stoichiometric composition Fe3Pt has been investigated, using Fe-23, 24 and 25 at. pct Pt alloys. The thermal hysteresis,M s temperature, martensite tetragonality and transformation volume change have been measured for specimens with various degrees of order, and correlations among these factors are discussed. The results indicate that the martensite tetragonality, or equivalently the.degree of order of the parent phase, is not the dominant factor which dictates a thermoelastic transformation. TheM s tempera-ture appears to play an important role in the transformation kinetics, and must be lower than a certain value to obtain a thermoelastic transformation in Fe-Pt alloys.
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formerly Research Assistant at the University of Illinois at Urbana-Champaign, Urbana, IL
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Umemoto, M., Wayman, C.M. The effect of austenite ordering on the transformation temperature, transformation hysteresis, and thermoelastic behavior in Fe- Pt alloys. Metall Trans A 9, 891–897 (1978). https://doi.org/10.1007/BF02649832
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DOI: https://doi.org/10.1007/BF02649832