Kyoto University · Materials Science
Nobuhiro Tsuji 교수의 연구실은 초미세구조 금속재료의 제조 및 거동을 핵심으로 하는 고강도·고 ductility 금속 소재 개발에 주력하고 있습니다. 특히 누적압연(ARB)을 활용한 연속적 가공 기반의 초미세다결정 금속 재료의 제조 기술과 그 기계적 거동, 특히 균열 및 다층화 파손 거동에 대한 기초 연구를 수행하고 있습니다. 연구는 고강도화와 연성 확보의 갈등 문제를 해결하고자, 나노미세구조 제어와 열처리 조합을 통한 기계적 성질 최적화를 목표로 합니다.
Figures are computed from collected data and may differ slightly.
Abstract Accumulative roll‐Bonding (ARB) is a severe plastic deformation (SPD) process invented by the authors in order to fabricate ultrafine grained metallic materials. ARB is the only SPD process applicable to continuous production of bulky materials. In the process, 50 % rolled material is cut into two, stacked to be the initial dimension and then rolled again. In order to obtain one‐body solid material, the rolling in ARB is not only a deformation process but also a bonding process (roll‐bo
A plain IF steel and a P-added IF steel having various ultrafine grain sizes from 0.24 to 11 μm were fabricated by the accumulative roll bonding (ARB) process followed by annealing. Dynamic fracture toughness of the ultrafine grained IF steels was investigated as a function of grain size by miniaturized Charpy impact test. The static strength of the IF steels significantly increased with decreasing the grain size, while the uniform elongation was limited in the ultrafine grained samples. A numbe
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