[1]顾新福,石章智,陈冷,等.相界面及相变晶体学择优[J].中国材料进展,2019,(08):731-741.[doi:10.7502/j.issn.1674-3962.201810001]
GU Xinfu,SHI Zhangzhi,CHEN Leng,et al.Interface and the Preference of Transformation Crystallography[J].MATERIALS CHINA,2019,(08):731-741.[doi:10.7502/j.issn.1674-3962.201810001]
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中国材料进展[ISSN:1674-3962/CN:61-1473/TG]
- 卷:
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- 期数:
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2019年第08期
- 页码:
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731-741
- 栏目:
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- 出版日期:
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2019-08-30
文章信息/Info
- Title:
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Interface and the Preference of Transformation Crystallography
- 作者:
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顾新福; 石章智; 陈冷; 杨平
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（北京科技大学材料科学与工程学院，北京 100083）
- Author(s):
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GU Xinfu; SHI Zhangzhi; CHEN Leng; YANG Ping
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(School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China)
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- 关键词:
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相变晶体学; 匹配/错配; 界面; 位向关系; 计算软件
- Keywords:
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transformation crystallography; match/mismatch; interface; orientation relationship; calculation software
- 分类号:
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O799
- DOI:
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10.7502/j.issn.1674-3962.201810001
- 文献标志码:
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A
- 摘要:
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固态相变是调控材料微观组织的一种重要手段。相变过程中，为了降低新相的形核能垒，新相与母相之间倾向于形成特定的位向关系，从而实现低能界面结构。两相之间这种形成特定晶体学特征的现象被称为相变晶体学择优。与相变热力学及相变动力学一样，相变晶体学也是理解微观组织形成不可缺少的知识。两相界面结构是理解相变晶体学择优规律的关键。由低能界面与界面匹配之间的关系出发，介绍了理解相变晶体学择优规律的几何模型及其应用。首先介绍匹配好区的定义，接着介绍定量描述匹配好区分布及界面位错结构的O点阵理论，以及由O点阵理论衍生出的相变晶体学几何模型和方法。相变晶体学模型输入简单，通常只需两相晶格常数，即可输出丰富的相变晶体学数据。最后以双相不锈钢中奥氏体析出相的相变晶体学为例，介绍了作者近年来开发的相变晶体学计算软件PTCLab的应用。此外，介绍的方法原则上适用于晶界的分析。
- Abstract:
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Solidtosolid phase transformation plays an important role in controlling microstructures in metallic materials. Specific orientation relationship (OR) and interfacial orientation (IO) are formed due to the reduction of the nucleation barrier via reducing the interfacial energy during phase transformation. The formation of such specific ORs and IOs is called the preference in transformation crystallography. In addition to phase transformation thermodynamics and kinetics, phase transformation crystallography is also indispensable for understanding the formation of various microstructures. Interfaces and their structures are the keys to understand the transformation crystallography. Specifically, interfacial matching is a common concept in geometric methods applied to study the crystallographic features generated from phase transformation. In this review, the method based on good matching sites (GMSs) in the interface is shown to qualitatively understand the transformation crystallography. The quantitative tool to describe the distribution of GMSs, ie. Olattice theory, is reviewed thereafter. Geometrical methods based on Olattice theory are further explored. Although the inputs for geometrical method are simple, usually needs lattice parameters of two phases during phase transformation, its outputs are rich in crystallographic features. Finally, a free software for transformation crystallography has been developed recently by us, PTCLab, is applied to understand the precipitation of austenite in duplex stainless steel. In principle, the concept reviewed in this paper could be also applicable to analyzing grain boundaries.
备注/Memo
- 备注/Memo:
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收稿日期：2018-09-30基金项目：中央高校基本科研业务费（FRF-TP-17-003A1）; 国家自然科学基金资助项目（51771024, 51871131）通讯作者： 顾新福 ，男，1981年生，讲师，Email: xinfugu@ustb.edu.cn
更新日期/Last Update:
2019-07-31