| Project/Area Number |
18K14032
|
|---|
| Research Category |
Grant-in-Aid for Early-Career Scientists
|
| Allocation Type | Multi-year Fund |
|---|
| Review Section |
Basic Section 26050:Material processing and microstructure control-related
|
|---|
| Research Institution | National Institute for Materials Science |
|---|
Principal Investigator |
Ogawa Yukiko 国立研究開発法人物質・材料研究機構, 構造材料研究拠点, 研究員 (70814268)
|
|---|
| Project Period (FY) |
2018-04-01 – 2022-03-31
|
| Project Status |
Completed (Fiscal Year 2021)
|
| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2019: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2018: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
|
|---|
| Keywords | マグネシウム合金 / 強加工 / 結晶粒径微細化 / 結晶粒微細化 / Mg合金 / 高強度 / 形状記憶特性 |
|---|
| Outline of Final Research Achievements |
Mg-Sc alloy shows high tensile properties and shape memory behavior. In this study we attempted to improve the mechanical properties of Mg-Sc by grain refinement. Several severe plastic deformation processes were carried out and we investigated microstructure of Mg-Sc after severe deformation. Bcc phase in Mg-Sc showed martensitic transformation during defamation process and it was difficult to get a fine grain. On the other hand, fine grained hcp phase showed good tensile properties even if Sc content was reduced.
|
| Academic Significance and Societal Importance of the Research Achievements |
Mg-Sc合金は、Mg合金では唯一形状記憶特性を示し高い強度－延性バランスが得られる一方、研究報告例が多くなく基礎的知見が不足していた。このことから、材料の機械的特性向上策として一般にとられる結晶粒径制御に関する知見が得られたことは学術的に意義がある。また、高価であるSc量を大きく低減させても高い機械的特性が得られたことは実用化の可能性を期待させるものであり、社会的にも意義があると考えられる。
|
