Investigation of Microscopic Mechanisms of Phase Transformations for the Structure Control of Materials

研究相变微观机制以控制材料结构

• 批准号: 09242107
• 负责人: KOIWA Masahiro
• 金额: $ 15.87万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research on Priority Areas
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-09242107/
• 关键词: Energy-filtering method; Electron Diffraction; Diffuse scattering; Phase transformation under external fields; Ordering process; Martensitic aging; Rubber-like behavior; Microstructure control; 変位型相変態; マルテンサイト変態; 拡散型変態; 規則-不規則変態; 金属間化合物; 形状記憶

The project team was organized in the following five groups :1. The development of diffraction techniques for studying phase transformations2. The development of computational techniques for studying phase transformations3. The investigation of microscopic mechanisms for diffusional transformations4. New development of displacive transformations5. Investigations of phase transformations under special conditions/environmentThe following three investigations are particularly alluded for their remarkable achievements.(1) Developments of quantitative electron microscopy utilizing the energy-filtering electron diffraction and its application to the analyses of phase transformation processes(2) Microstructure control by applying external stress or magnetic fields during the order-disorder transformation of FePd(3) A new interpretation of the mechanism for the development of rubber-like behavior of Au-Cd alloys by annealing in martensitic stateThe papers based on the results of the present project have been published in :Proceedings of the International Conference on Solid-Solid Phase Transformations '99",Edited by M.Koiwa et al, The Japan Institute of Metals, November 1999. A special issue of Materials Science and Engineering, A (Elsevier), to be publilshed in the autumn of 2001, will be devoted to those papers contributed from the research members of the present project : "Special issue on Microscopic Mechanisms of Phase Transformations"

项目组由以下五个小组组成：1.发展用于研究相变的衍射技术2.研究相变的计算技术的发展3。扩散相变微观机制的研究4。位移变换的新发展5.在特殊条件/环境下的相变研究：(1)利用能量过滤电子衍射的定量电子显微镜的发展及其在相变过程分析中的应用(2)在FEPD的有序-无序相变过程中通过施加外加应力或磁场来控制微观结构(3)对Au-Cd合金通过马氏体态的退火热处理形成类橡胶行为的机制的新解释基于本项目结果的论文已发表在由M.Koiwa等人编辑的《‘99国际固-固相转变会议论文集》上，日本金属学会，1999年11月。将于2001年秋季出版的《材料科学与工程》特刊A(Elsevier)将专门介绍本项目研究人员投稿的论文：《相变微观机制特刊》

项目成果

X.Ren: "A Study of the Rubber-like Behavior of Mono-Domain Au-Cd Martensite" Mat.Res.Soc.Symp.Proc.459. 305-310 (1997)

X.Ren：“单域金镉马氏体的类橡胶行为研究”Mat.Res.Soc.Symp.Proc.459。

X.Ren: "Universal symmetry property of point defects in crystals"Physical Review Letters. 85. 1016-1019 (2000)

任X.：《晶体中点缺陷的普遍对称性》物理评论快报。

K.Hiraga: "Ordered structures in decagonal quasicrystals with simple and body-centered hypercubic lattices"Materials Science and Engineering, A. (in press). (2001)

K.Hiraga：“具有简单体心超立方晶格的十方准晶体的有序结构”材料科学与工程，A.（出版中）。

T.Miyazaki: "Computer simulations of the phase transformation in real alloy systems based on the phase field method"Materials Science and Engineering, A. (in press). (2001)

T.Miyazaki：“基于相场方法对真实合金系统中相变的计算机模拟”材料科学与工程，A.（出版中）。

T. Ichitsubo: "Configurational free energy in order-disorder transitions from Monte Carlo calculations for systems under external fields"Physical Review B. 63・13. 9198-9201 (1999)

T. Ichitsubo：“外部场下系统的蒙特卡罗计算中的有序-无序转变中的构型自由能”物理评论 B. 9198-9201 (1999)