| Project/Area Number |
10305054
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (A)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Material processing/treatments
|
|---|
| Research Institution | Osaka University |
|---|
Principal Investigator |
SAITO Yoshihiro Professor, Graduate School of Engineering, 大学院・工学研究科, 教授 (20029101)
|
|---|
| 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)
|
|---|
| Project Period (FY) |
1998 – 2000
|
| Project Status |
Completed (Fiscal Year 2001)
|
| Budget Amount *help |
¥38,000,000 (Direct Cost: ¥38,000,000)
Fiscal Year 2000: ¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 1999: ¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1998: ¥34,300,000 (Direct Cost: ¥34,300,000)
|
|---|
| Keywords | structural metallic materials / aluminum alloys / steels / severe plastic deformation / rolling / accumulative roll-bonding (ARB) / ultrafine grains / mechanical properties / 局所方位測定 / 高強度 / Hall-Petchの関係 / 粒成長 / 繰り返し重ね接合圧延(ARB) / 回復・再結晶・粒成長 / EBSP / ナノ結晶粒 / 高強度化 / 超塑性 / 回復・再結晶 |
|---|
| 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.
|
