On the Thermodynamics of Martensite Nucleation

Estimations of nucleation barriers for single-domain and multiple-domain strates of a martensitic phase have been obtained. A macroscopic approach, considering the free energy of a heterophase system to be a sum of the energy of the elastically stressed equilibrium phases and the energy of interface...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 1988-10, Vol.A127 (2), p.229-238
Main Author: Roitburd, A L
Format: Article
Language:English
Online Access:Get full text
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Summary:Estimations of nucleation barriers for single-domain and multiple-domain strates of a martensitic phase have been obtained. A macroscopic approach, considering the free energy of a heterophase system to be a sum of the energy of the elastically stressed equilibrium phases and the energy of interfaces, was used. It has been shown that for the martensitic transformation in steels and Fe alloys, the nucleation of single-domain (single-crystal) martensite is impossible. The nucleation barrier for multiple-domain (twinned) martensite has been found to be of 10 exp 3 times less than former estimations that had rejected any possibility of the homogeneous nucleation of martensite. Graphs. 34 ref.--AA
ISSN:0921-5093