• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

2019 Fiscal Year Final Research Report

New strengthening mechanism of steels by high-energy dislocations

Research Project

  • PDF
Project/Area Number 18K18951
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 26:Materials engineering and related fields
Research InstitutionShimane University

Principal Investigator

Arakawa Kazuto  島根大学, 学術研究院理工学系, 教授 (30294367)

Project Period (FY) 2018-06-29 – 2020-03-31
Keywords転位 / 材料強化 / 鉄鋼 / 電子顕微鏡
Outline of Final Research Achievements

It has been recognized that plastic deformation of alpha-iron based materials such as ferritic steels is governed by dislocations with the Burgers vector of 1/2<111>. In contrast, “high-energy” <100> dislocations have been ignored because of their instability. However, it is expected that alpha-iron based materials can be strengthened by replacement of major dislocations with <100> dislocations.
In the present study, we have clarified various properties of “high-energy <100> dislocations” in alpha-iron, using transmission electron microscopy.

Free Research Field

格子欠陥

Academic Significance and Societal Importance of the Research Achievements

金属材料の塑性変形は、転位と呼ばれる線状の原子配置の乱れの動きによって担われる。従来、金属材料の強化は、転位の障害物(異種原子、析出物、粒界、他の転位)を利用するものであった。これに対して本研究は、転位の種類を変えてしまうことにより材料を強化するという、新しい材料強化法の原理の開拓を目指すところに学術的意義がある。
この原理の実用化には多くの課題が残されているが、実用化に成功すれば、より低コストでより強い鉄鋼材料を創れると見込まれる。

URL: 

Published: 2021-02-19  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi