Development of multi-phase steels with fine and complicated 3-dimensional continuous structure by controlling martensitic transformation
| Project/Area Number |
26709054
|
|---|
| Research Category |
Grant-in-Aid for Young Scientists (A)
|
| Allocation Type | Partial Multi-year Fund |
|---|
| Research Field |
Material processing/Microstructural control engineering
|
|---|
| Research Institution | The University of Tokyo |
|---|
Principal Investigator |
NAMBU Shoichi 東京大学, 工学(系)研究科(研究院), 講師 (00529654)
|
|---|
| Project Period (FY) |
2014-04-01 – 2017-03-31
|
| Project Status |
Completed (Fiscal Year 2016)
|
| Budget Amount *help |
¥21,450,000 (Direct Cost: ¥16,500,000、Indirect Cost: ¥4,950,000)
Fiscal Year 2016: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2015: ¥6,890,000 (Direct Cost: ¥5,300,000、Indirect Cost: ¥1,590,000)
Fiscal Year 2014: ¥11,960,000 (Direct Cost: ¥9,200,000、Indirect Cost: ¥2,760,000)
|
|---|
| Keywords | 組織制御 / マルテンサイト変態 / 鉄鋼材料 / オーステナイト / その場観察 / 結晶方位解析 / 強度 / 延性 / マルテンサイト / 相変態 |
|---|
| Outline of Final Research Achievements |
To develop a multi-phase steels with 3-dimensinal continuous structure having improved strength and ductility combinations, we aimed to propose the principles to control the microstructures and improve the mechanical properties. The evolution process of microstructure during martensitic transformation, especially in the early stage, was investigated by in-situ observation. It was demonstrated that the process depends on the carbon contents that is the yield stress of austenite phase. The thermal process was proposed to stabilize the austenite phase by promoting the carbon diffusion, and the deformation induced transformation is expanded to relatively high strain range by uniforming the carbon distribution in austenite phase. Also the affecting factors to deformation induced transformation was investigated by in-situ EBSD observation.
|
Report
(4 results)
Research Products
(7 results)
