2001 Fiscal Year Final Research Report Summary
Production of Ultrafine Grained Structural Metallic Materials by Means of Severe Warm Rolling
| Project/Area Number |
10305054
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Material processing/treatments
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| Research Institution | Osaka University |
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Principal Investigator |
SAITO Yoshihiro Professor, Graduate School of Engineering, 大学院・工学研究科, 教授 (20029101)
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| Co-Investigator(Kenkyū-buntansha) |
UTSUNOMIYA Hiroshi Research Assistant, Graduate School of Engineering, 大学院・工学研究科, 助手 (80252584)
SAKAI Tetsuo Lecturer, Graduate School of Engineering, 大学院・工学研究科, 講師 (80029298)
TSUJI Nobuhiro Associate Professor, Graduate School of Engineering, 大学院・工学研究科, 助教授 (30263213)
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| Project Period (FY) |
1998 – 2000
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| Keywords | structural metallic materials / aluminum alloys / steels / severe plastic deformation / rolling / accumulative roll-bonding (ARB) / ultrafine grains / mechanical properties |
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| Research Abstract |
Ultra-grain refinement of structural metallic materials was studied. A novel severe plastic deformation process applicable to continuous production of large bulky materials, Accumulative Roll-Bonding (ARB) was developed. The ARB process was applied to various kinds of aluminum alloys, steels and copper alloys, and ultrafine grained structure with mean grain sizes of several hundreds nano-meters was successfully obtained in all the materials. The ultrafine grained materials performed very high strength compared with the starting materials. The formation mechanism of the ultrafine grains during severe plastic deformation was clarified.
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