The effect of light irradiation on the plastic deformation behavior of solid materials

2023 Fiscal Year Final Research Report

• Project/Area Number: 21H04532
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Medium-sized Section 18:Mechanics of materials, production engineering, design engineering, and related fields
• Research Institution: Osaka University
• Principal Investigator: Nakamura Atsutomo 大阪大学, 大学院基礎工学研究科, 教授 (20419675)
• Co-Investigator(Kenkyū-buntansha): 栃木 栄太 東京大学, 生産技術研究所, 准教授 (50709483)
• Project Period (FY): 2021-04-05 – 2024-03-31
• Keywords: 材料強度 / 転位 / 光環境 / 塑性 / 電子顕微鏡

Outline of Final Research Achievements

The phenomena by which light affects the strength and brittleness of solid materials have not yet been systematically elucidated, and it is unclear which materials are affected by light and to what extent. In this study, we irradiated various solid materials with light and systematically investigated changes in their strength properties. In particular, we focused on dislocations in crystals and evaluated the effect of light on the behavior of dislocations. As a result, unexpected light environment effects were found in various materials. In particular, it was confirmed that the light environmental effect varies significantly depending on the relationship between the structural features of the crystal and the direction in which the force is applied.

Free Research Field

ナノ材料物性

Academic Significance and Societal Importance of the Research Achievements

金属以外の無機固体物質の多くは、脆性的で容易に破壊するため、その応用が限定的となっていた。最近、光が材料の強度特性に顕著に影響することが確認されたので、本研究では異なる元素、構造を有する各種固体物質に対して、光環境制御下で力学試験を実施した。その結果、固体物質がどのように変形しどのように壊れていくのかという材料強度の基礎研究において、光という環境が変わるだけで想定外の強度特性を示すことがあらためて確認された。今後、国際連携を行いつつ現象をより深く理解することで、材料の用途拡大に繋げることが可能と考えられる。