A Thermodynamic Analysis Model on the Thermoelastic Martensitic Tansformation

摘要

Leading into two order-parameters, that is, the percent of the transformed martensite φand the mean strain ε, this paper is mainly to discuss the influence of external applied stress σ on the initial phase transition temperature TC, the amount of the transformed martensite and the nature of the martensitic transformation by making use of Landau's phenomenological theory. A free-energy density functions is spread out according to Φ and ε. The relations between φ and temperature T are investigated. The obtained conclusion can directly be compared with experimental results.