| Project/Area Number |
25630321
|
|---|
| Research Category |
Grant-in-Aid for Challenging Exploratory Research
|
| Allocation Type | Multi-year Fund |
|---|
| Research Field |
Material processing/Microstructural control engineering
|
|---|
| Research Institution | Tohoku University |
|---|
Principal Investigator |
|
|---|
| Project Period (FY) |
2013-04-01 – 2015-03-31
|
| Project Status |
Completed (Fiscal Year 2014)
|
| Budget Amount *help |
¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
|
|---|
| Keywords | 表面硬化 / 鉄鋼材料 / 超強加工 / 窒化 / 表面硬化処理 / 窒化処理 |
|---|
| Outline of Final Research Achievements |
In this research, Fe-M binary alloys were nitrided after deformation by high pressure torsion in order to clarify effects of strain on nitriding behavior. It was found that precipitation of AlN is accelerated by the strain, leading to larger surface hardening, while effects of strain on surface hardness are small in pure Fe and Fe-Cr alloy. This is because strain in pure Fe is rapidly recovered by recrystallization and precipitation of Cr nitride does not need dislocation as a nucleation site. Furthermore, it is found that homogeneous compound layer can be formed by deformation prior to nitriding treatment in Fe-Al alloy.
|
