Open Access
Article Number 02023
Number of page(s) 5
Section Principles, Simulations, Materials: Background
Published online 01 September 2009
ESOMAT 2009, 02023 (2009)
DOI: 10.1051/esomat/200902023

Effect of carbon and cold rolling on the latent heat upon ε → γ transformation in metastable Fe-Mn alloys

M. Murasov1, L. Duprez2, B. Verlinden1 and J. V. Humbeeck1

1  Department MTM, KU-Leuven, 3001 Leuven, Belgium
2  SMCD Department, AM R&D Gent, 9060 Zelzate, Belgium

Published online: 1 September 2009

Metastable Fe-Mn alloys exhibit a non-thermoelastic martensitic transformation which is accompanied by a significant thermal effect (ca. 20 J/g). Among Fe-Mn alloys, the highest value of latent heat was registered in alloys with 17-18 wt. % Mn. In this work we investigate effects of carbon (up to 0.4 wt. %) and cold rolling (5-25% of thickness reduction) on the latent heat and the temperature hysteresis of the martensitic transformation. Changes in chemical and phase composition are analyzed based on the goal of enthalpy maximizing. The martensite ↔ austenite transitions are registered using differential scanning calorimetry and dilatometry. The phase composition is determined by means of X-ray diffraction. An effect of thermocycling is considered in connection with microstructural and enthalpy changes.

© Owned by the authors, published by EDP Sciences 2009