New strengthening mechanism of alpha-iron based materials by introduction of high-energy dislocations

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K14109
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Physical properties of metals/Metal-base materials
• Research Institution: Shimane University
• Principal Investigator: Arakawa Kazuto 島根大学, 総合理工学研究科, 准教授 (30294367)
• Co-Investigator(Renkei-kenkyūsha): TANAKA Nobuo 名古屋大学, エコトピア科学研究所, 教授 (40126876) ; KOMATSU Masao 広島工業大学, 工学研究科, 教授 (80309616) ; SANO Tomokazu 大阪大学, 工学研究科, 准教授 (30314371)
• Project Period (FY): 2015-04-01 – 2018-03-31
• 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 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 aimed at opening up a new strengthening mechanism by <100> dislocations. For this purpose, we explored conditions for introduction of <100> dislocations as major dislocations.

Free Research Field

格子欠陥