Giant Straining Process for Advanced Materials Containing Ultra-High Density Lattice Defects

含有超高密度晶格缺陷的先进材料的巨应变工艺

• 批准号: 18062006
• 负责人: 堀田 善治
• 金额: $ 7.94万
• 依托单位: Kyushu 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: 2006
• 资助国家: 日本
• 起止时间: 2006 至 2009
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-18062006/
• 关键词: 巨大ひずみ; 高密度格子欠陥; 形状不変加工; 材料メカニックス; マルチスケール計算

In this research project, we conducted giant straining processes (GPS) to impose large strain in metallic materials and investigated the role of high density lattice defects for the microstructure refinement and simultaneous achievement of strength and ductility. First, we examined mechanisms of grain refinement when large strain was imposed on the samples through GPS. Second, we investigated mechanisms for the unusual and unique mechanical properties that the strength and ductility were both improved. In order to achieve the goal, this research program proceeded with 3 teams. Each team consisted of 2 groups: one was based on experimental measurements and structure observations and the other was theoretical calculation and computer simulation. This projected was carried out by using samples common to all groups and by making an intimate and frequent exchange of idea and information.

在这个研究项目中，我们进行了巨大的应变过程（GPS），在金属材料中施加大的应变，并研究了高密度晶格缺陷的微观结构细化和同时实现强度和延展性的作用。首先，我们研究了晶粒细化的机制时，大应变施加在样品上，通过GPS。其次，我们研究了强度和延展性都得到改善的不寻常和独特的机械性能的机制。为了实现这一目标，该研究计划由三个团队进行。每个小组由两组组成：一组是基于实验测量和结构观察，另一组是理论计算和计算机模拟。这一预测是通过使用所有群体共同的样本并通过密切和频繁地交流想法和信息来进行的。

项目成果

Development of High-Pressure Sliding for Microstructural Refinement of Rectangular Metallic Sheets

矩形金属板微观结构细化高压滑动技术的发展

• 发表时间: 2009
• 期刊: Materials Transactions 50
• 作者: T. Fujioka;Z. Horita
• 通讯作者: Z. Horita

First-Principles Study of the Mechanical Properties of Metallic Grain Boundaries using Local Energy Density and Local Stress Density

利用局部能量密度和局部应力密度研究金属晶界力学性能的第一性原理

• 发表时间: 2008
• 作者: Zenji;Horita;Zenji Horita;Zenji Horita;香山正憲;大橋鉄也;Z. Horita;M. Kohyama
• 通讯作者: M. Kohyama

A Multiscale Modeling of Grain Boundary Characteristics in Aluminum

铝晶界特征的多尺度建模

• 发表时间: 2008
• 作者: A. Nakatani;Y. Mukudai
• 通讯作者: Y. Mukudai

Conditions for Grain Refinement Using Severe Plastic Deformation.

利用剧烈塑性变形细化晶粒的条件。

• 发表时间: 2007
• 作者: Y. Murata;M. Morinaga;Zenji Horita;M. Kohyama;大橋鉄也;Z. Horita
• 通讯作者: Z. Horita

NANOMATERIALS BY SEVERE PLASTIC DEFORMATION

• DOI: 10.4028/0-87849-985-7
• 发表时间: 2006
• 作者: Y. Perlovich;M. Isaenkova;Fesenko;M. Grekhov;Alexandrov;I. Beyerlein