Crystallographic features of phase transformations in solids
Crystallographic features of phase transformations in solids
复制标题
DOI：
10.1016/j.pmatsci.2009.06.001
复制
发表时间：
2009-11
影响因子：
37.4
通讯作者：
Mingxing Zhang;P. Kelly
中科院分区：
文献类型：
--
作者：
Mingxing Zhang;P. Kelly
本文回顾了当前对固体材料（金属、陶瓷和合金）相变晶体学特征的认识和理解。它涵盖了晶体固体中的两大类相变——马氏体或“位移”和“扩散”或“重构”。对控制这两类转变的晶体学特征的因素进行了比较和对比。这为检查似乎表现出两个类别特征的“扩散-位移”转变提供了适当的基础。在简要总结了有关这些不同类型相变的晶体学特征的大量实验数据后，讨论了为解释这些观察结果而提出的不同模型/理论。主要重点是那些能够预测这些晶体学特征的模型/理论，而不仅仅是合理化或解释这些晶体学特征。该评论有意采用统一的方法，并试图调和“置换”群体和“扩散”群体之间偶尔存在的争议，特别是在“扩散-置换”转变方面。显然，最终目标是全面了解各类相变的晶体学特征。审查的结论是评估我们距离最终成就有多远，找出当前知识的差距并建议未来的工作。
The paper reviews the current knowledge and understanding of the crystallographic features of phase transformations in solid materials – metals, ceramics and alloys. It covers both of the broad classes of phase transformations in crystalline solids – martensitic or ‘displacive’ and ‘diffusional’ or ‘reconstructive’. The factors that govern the crystallographic features of these two classes of transformations are compared and contrasted. This provides an appropriate basis for examining the ‘diffusional–displacive’ transformations that appear to exhibit the characteristics of both classes. After a brief summary of the considerable body of experimental data available on the crystallographic characteristics of these various types of phase transformation, the different models/theories advanced to account for these observations are discussed. The main emphasis is on those models/theories that are capable of predicting, rather than just rationalising or explaining, these crystallographic features. The review purposely adopts a unifying approach and attempts to reconcile the controversy that has on occasions existed between the ‘displacive’ group and the ‘diffusional’ group – particularly in respect of the ‘diffusional–displacive’ transformation. Developing a comprehensive understanding of the crystallographic features of all classes of phase transformations is obviously the ultimate goal. The review concludes by assessing how close we are to this final achievement, identifies the gaps in current knowledge and suggests future work.