Kinetics of Phase Transformations

这是金属合金中相分离、有序和结晶动力学的实验和理论研究。马氏体相变动力学研究强调铜/金合金中同时发生的有序和形状变化反应。该研究还包括准马氏体动力学的时间分辨研究，其中马氏体反应因热扩散而减慢。旋轴附近结晶动力学是理论研究和模拟研究的热点。均相形核和异相形核均被考虑。研究了液体在旋点处形成“团”相的概念。研究了FeAl和FeCo合金的有序性。这项研究扩展了我们对与几种相变相关的动力学的知识基础。相变在重要技术材料的加工和性能中起着至关重要的作用。＊＊＊

9305575 Klein This is an experimental and theoretical study of phase separation, ordering, and crystallization kinetics in metal alloys. Research on kinetics of martensitic transformations emphasizes simultaneous ordering and shape change reactions occurring in copper/gold alloys. The research also includes time-resolved studies of quasimartensitic kinetics in which the martensitic reaction is slowed by heat diffusion. The crystallization kinetics near spinodals is a focus in the theoretical and simulation effort. Both homogeneous and heterogenous nucleation are considered. The concept of liquid forming a "clump" phase at a spinodal point is examined. Ordering is examined in FeAl and FeCo alloys. %%% This research expands our knowledge base on the kinetics associated with several phase transformations. Phase transformations play an essential role in the processing and properties of technologically important materials. ***