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

在本研究项目中，我们采用巨型应变工艺(GPS)对金属材料施加大应变，并研究了高密度晶格缺陷在细化组织和同时获得强度和塑性方面的作用。首先，我们研究了通过GPS对样品施加大应变时的细化机制。其次，我们研究了强度和延性都得到改善的异常和独特的力学性能的机理。为了实现这一目标，本研究项目由3个团队进行。每个团队由两组组成：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有的样本以及密切和频繁地交流想法和信息来进行的。

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.