Faceted interfaces: a key feature to quantitative understanding of transformation morphology

作     者：Wen-Zheng Zhang Xin-Fu Gu Fu-Zhi Dai 

作者机构：School of Materials Science and EngineeringTsinghua UniversityBeijingChina Institute for Materials ResearchTohoku UniversitySendaiJapan Science and Technology on Advanced Functional Composite LaboratoryAerospace Research Institute of Materials and Processing TechnologyBeijingChina 

出 版 物：《npj Computational Materials》 (计算材料学（英文）)

年 卷 期：2016年第2卷第1期

页      面：44-57页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by Natural Science Foundation of China(nos 51171088 and 51471097) the National 973 Program of China(grant no.2012CB619403) 

主　　题：transformation rational interface 

摘      要：Faceted interfaces are a typical key feature of the morphology of many microstructures generated from solid-state phase ***,prediction and simulation of this faceted morphology remain a challenge,especially for systems where irrational orientation relationships(ORs)between two phases and irrational interface orientations(IOs)are *** terms of structural singularities,this work suggests an integrated framework,which possibly encompasses all candidates of faceted *** structural singularities are identified from a matching pattern,a dislocation structure and/or a ledge *** resultant singular interfaces have discrete IOs,described with low-index g’s(rational orientations)and/orΔg’s(either rational or irrational orientations).Various existing models are grouped according to their determined results regarding the OR and IO,and the links between the models are clarified in the integrated *** of defect types as far as possible in a dominant singular interface often exerts a central restriction on the *** irrational IO is usually due to the elimination of dislocations in one direction,i.e.,an O-line *** methods using both three-dimensional and two-dimensional models for quantitative determinations of O-line interfaces are reviewed,and a detailed example showing the calculation for an irrational interface is *** association between structural singularities and local energy minima is verified by atomistic calculations of interfacial energies in fcc/bcc alloys where it is found that the calculated equilibrium cross-sections are in a good agreement with observations from selected alloys.