A MODIFIED MODEL USED TO DESCRIBE AUSTENITE/MARTENSITE INTERFACE
Received date: 2009-11-30
Revised date: 2010-02-10
Online published: 2010-04-11
Supported by
Supported by National Natural Science Foundation of China (Nos.50471014 and U0774011)
A modified Landau polynomial was proposed to describe the structure features of austenite/martensite interface under the existence of an intrfacial preferrd state. When the elastic modulus of austenite, the energy of preferred state and thdriving force for martensitic transformation were selected as the variables, a transitional platform with a slow change in order parameter, i.e. scaled shear strain whose structure is neither austenite nor martensite, was found using Ginzburg–Landau theory. The energ and width of austenite/martensite interface were calculated. Based on these calculated results, some experimental phenomena during martensitic transformatin can be explaned perfectly. It is demonstrated that the current model is more universal.
Key words： martensite; Landau theory; interface
CHENG Ning , GUO Zheng-Hong , MENG Qiang-Beng . A MODIFIED MODEL USED TO DESCRIBE AUSTENITE/MARTENSITE INTERFACE[J]. Acta Metall Sin, 2010 , 46(4) : 418 -422 . DOI: 10.3724/SP.J.1037.2009.00800
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