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关于有序及簇聚结构Dastur的动态应变时效观点能够较好地解释高锰钢的加工硬化规律,但这一观点的核心是塑变过程中形成有序的C—Mn原子对,这一模型还没有获得直接的实验证实.按余氏固体与分子经验电子理论,高锰钢中的锰原子有较大的机率占据奥氏体的面心位置,而铁原子则趋于占据立方晶胞的顶角,对于处于面心晶胞体心位置的C原子,这种结构正好形成天然的C—Mn原子对(图2),其组合就形成有序的簇聚结构.问题是对于含Mn12%左右,含C1%左右的高锰钢而言,平均约2个晶胞中才有一个Mn原子.5个晶胞中才有一个C原子,这就将晶胞分为不含含金晶胞、含Mn晶胞、含C晶胞和含Mn—C晶胞,按照现代合金成分微观不均匀理论~(16)产生这种微观偏聚是可能的.可以将动态应变时效过程中有序结构的形成看成是
The viewpoint of dynamic strain aging of ordered and cluster structure Dastur can explain the work hardening law of high manganese steel well, but the core of this view is the formation of ordered C-Mn atom pairs in the plastic deformation process. This model Has not been directly confirmed by experiments.According to Yu's solid and molecular empirical electronic theory, manganese atoms in high manganese steel have a greater probability of occupying the face-centered position of austenite, while the iron atoms tend to occupy the cubic unit cell The apex, for a C atom located at the center of the facet crystal cell, happens to form a natural pair of C-Mn atoms (Figure 2), which in combination form an ordered cluster structure.The problem is that for a C-Mn containing about 12% Mn , Containing about C1% of high manganese steel, the average of about 2 cells only have a Mn atom .5 cells have a C atom, which will be divided into cells without gold containing unit cells containing It is possible to produce this kind of microscopic segregation according to the microscopic heterogeneity theory of modern alloy composition ~ (16) .Moreover, the formation of ordered structure during dynamic strain aging Think of it as