2010 Fiscal Year Final Research Report
Control of bi-modal nanostructure by friction stir processing
| Project/Area Number |
20760503
|
|---|
| Research Category |
Grant-in-Aid for Young Scientists (B)
|
| Allocation Type | Single-year Grants |
|---|
| Research Field |
Material processing/treatments
|
|---|
| Research Institution | Osaka Municipal Technical Research Institute |
|---|
Principal Investigator |
MORISADA Yoshiaki Osaka Municipal Technical Research Institute, 研究員 (00416356)
|
|---|
| Project Period (FY) |
2008 – 2010
|
| Keywords | 結晶 / 組織制御 |
|---|
| Research Abstract |
The bi-modal nanostructure was formed by the friction stir processing (FSP) on the composites consist of a metal matrix and many fine hard particles. Additionally, the ideal nanostructure could be obtained by the FSP on the tool steel layer with many chromium carbide carbides and vanadium carbide particles. The carbide particles were segregated on the grain boundary of the matrix for the laser clad layer. Generally, it leads to brittle properties of the materials. On the other hand, the segregated carbide particles were crushed and dispersed in the matrix. The FSPed tool steel layer showed high hardness of 900HV which was much higher than that of the sintered tool steel.
|
