2023 Fiscal Year Final Research Report
Interstitial sub-lattice design of ferrous alloys
| Project/Area Number |
22K18895
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| Research Category |
Grant-in-Aid for Challenging Research (Exploratory)
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| Allocation Type | Multi-year Fund |
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| Review Section |
Medium-sized Section 26:Materials engineering and related fields
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
佐藤 充孝 東北大学, 金属材料研究所, 助教 (10547706)
張 咏ジエ 東北大学, 金属材料研究所, 助教 (40793740)
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| Project Period (FY) |
2022-06-30 – 2024-03-31
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| Keywords | 鉄鋼 / 析出 / 熱処理 / 合金元素 / 高強度化 |
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| Outline of Final Research Achievements |
A novel concept 'sub lattice engineering' , in which the arrangement of interstitial element was controlled in coupling of that of substitutional element as well as phase transformation, was proposed In materials design by choosing iron lattice as a model system. It was confirmed that strong attractive interaction between interstitial and substitutional elements was important in nanoscale clustering induced by atomic ordering and resultant large strengthening effects. This concept can be applied to a wide variety of metallic solid solution for the design of multi-dimensional structure and functions.
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| Free Research Field |
鉄鋼材料学，金属組織学
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| Academic Significance and Societal Importance of the Research Achievements |
本コンセプトは，リジッドな構造を持たず不規則性が高い金属固溶体における強度発現の原理を解明したものであり，置換型および侵入型の異なるサブラティス間の引力型相互作用の大きさが，ナノ領域の濃度分離と規則化の重畳による大きな強化能を発現する鍵となることを明確に示した．この知見は低合金鋼・高合金鋼に応用可能であることは言うまでもなく，非鉄合金も含めてナノ構造の多次元的制御に基づく機能の設計につながると考えられる．
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