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Extrinsic and intrinsic size effects on the fatigue strength of metallic micro/nano films unraveled by slip penetrability

Research Project

Project/Area Number 25K01121
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 18010:Mechanics of materials and materials-related
Research InstitutionKyushu University

Principal Investigator

近藤 俊之  九州大学, 工学研究院, 准教授 (70735042)

Co-Investigator(Kenkyū-buntansha) 濱田 繁  九州大学, 工学研究院, 教授 (90432856)
植木 翔平  九州大学, 工学研究院, 助教 (50880382)
Project Period (FY) 2025-04-01 – 2028-03-31
Project Status Granted (Fiscal Year 2025)
Budget Amount *help
¥18,850,000 (Direct Cost: ¥14,500,000、Indirect Cost: ¥4,350,000)
Fiscal Year 2027: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2026: ¥6,760,000 (Direct Cost: ¥5,200,000、Indirect Cost: ¥1,560,000)
Fiscal Year 2025: ¥8,190,000 (Direct Cost: ¥6,300,000、Indirect Cost: ¥1,890,000)
Keywords材料強度学 / マイクロ・ナノ材料 / 薄膜 / 疲労 / 微視組織
Outline of Research at the Start

本研究は,数μm~nmオーダー厚の金属マイクロ・ナノ薄膜の疲労強度の外的寸法(厚さ)と内的寸法(結晶粒径)の2つの寸法効果の発現機構の解明を目的とする。微視的疲労損傷の形成・発達過程の3次元観察と力学的・結晶学的分析を行い,すべり変形が結晶粒界に阻害されずに厚さ方向へ貫通できるか否かを示す“すべり貫通能”を指標として,疲労強度の外的・内的寸法効果を理解する。

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Published: 2025-04-17   Modified: 2025-06-20  

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