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近年来,马氏体相变(martensitic transformation,简称MT)的分形描述受到人们关注。Hornbogen用Sierpinski地毯描述一些合金的MT,但Sierpinski地毯在形态上与实际的微观结构相差较大。龙起易等提出一MT分形模型,可根据马氏体和奥氏(austenic)体晶粒尺寸的变化,算出其分维,但其形态仍未被实验证实。Wunderlich根据ZrO_2中MT经常看到的形态变化,提出一MT模型,但它不是分形。本文对Fe-29％Ni-0.16％C合金冷却过程中MT进行跟踪观察,在马氏体组态形貌变化的基础上,提出一MT分形模型。
In recent years, the fractal description of martensitic transformation (MT) attracts people’s attention. Hornbogen describes the MT of some alloys with Sierpinski rugs, but Sierpinski rugs differ in morphology from the actual microstructure. Long et al proposed a MT fractal model, according to the martensite and austenitic (austenic) grain size changes, calculate the fractal dimension, but its morphology has not been experimentally confirmed. Wunderlich proposed an MT model based on the morphological changes often seen by MT in ZrO 2, but it is not fractal. In this paper, MT observation of Fe-29% Ni-0.16% C alloy during cooling was observed. Based on the morphological changes of the martensite configuration, a MT fractal model was proposed.