Exploring of ageing nature of materials at atomic scale

2020 Fiscal Year Final Research Report

• Project/Area Number: 18K18953
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 26:Materials engineering and related fields
• Research Institution: Kyushu University
• Principal Investigator: Kaneko Kenji 九州大学, 工学研究院, 教授 (30336002)
• Project Period (FY): 2018-06-29 – 2021-03-31
• Keywords: 鉄鋼材料 / 炭素クラスター / 合金

Outline of Final Research Achievements

The structure and properties of carbon-steel is strongly dependent on the amount of carbon as well as the form of carbon. When the carbon-steel is aged at low temperatures, the carbon clusters are usually formed and result in the increase strength of the carbon-steel. In this research, a TEM holder was developed for in-situ heating analysis for the aim of understanding the strengthening mechanism of carbon-steel with carbon clusters, and the generation/dispersion state and crystal structure of carbon clusters were examined. In addition, in-situ tensile experiment was carried out to observe the interaction between carbon clusters and dislocations.

Free Research Field

微構造解析

Academic Significance and Societal Importance of the Research Achievements

透過型電子顕微鏡用の新ホルダーを開発することにより、その場加熱実験と高傾斜観察が可能となった。鉄鋼材料中における炭素クラスターの結晶学的知見を得ることに成功している。また、炭素クラスターと転位との相互作用を直接的に知見を得ることに成功している。今後、この観察法を他の合金材料などに適用することにより、その強化機構をナノスケールで解明することが可能となる。