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在择优态存在的前提下,以修正Landau多项式描述奥氏体/马氏体的界面特征.以母相弹性模量、择优态能量和马氏体相变驱动力为参数,利用Ginzburg-Landau理论计算了奥氏体/马氏体的界面结构及相关性质.结果表明,奥氏体/马氏体界面存在一个序参量变化缓慢的平台,这个平台对应于点阵结构既非奥氏体也非马氏体的过渡区域.通过对奥氏体/马氏体界面宽度和界面能的计算,表明本模型可很好地解释一些实验中观察到的现象.
Under the precondition of preponderance, the modified Landau polynomial is used to describe the interface characteristics of austenite / martensite. Taking the elastic modulus of mother phase, the energy of preferred phase and the driving force of martensite phase transformation as parameters, Ginzburg-Landau theory The interfacial structure and related properties of austenite / martensite have been calculated.The results show that there is a platform with slow change of order parameter in austenite / martensite interface, which corresponds to the structure of lattice Martensitic transition zone.Through the calculation of the austenite / martensite interface width and interfacial energy, it is shown that this model can well explain the phenomena observed in some experiments.