| Project/Area Number |
21K14432
|
|---|
| 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 | Tohoku University |
|---|
Principal Investigator |
卞 華康 東北大学, 金属材料研究所, 助教 (30796230)
|
|---|
| Project Period (FY) |
2021-04-01 – 2022-03-31
|
| Project Status |
Discontinued (Fiscal Year 2021)
|
| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2022: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
|
|---|
| Keywords | Superheating / AlSI alloy / EBM / Additive manufactuing / Al-Si / refining |
|---|
| Outline of Research at the Start |
Superheating effect was observed in building process via electron beam melting additive manufacturing. The present research will figure out the details of superheating and use this effect to refine the microstructure of cast Al-Si alloy including both Si phase and Al matrix. The ductility of cast Al-Si alloy could be improved via this method.
|
| Outline of Annual Research Achievements |
Recently, a high tensile ductility upto 33% at room temperature in AlSi10Mg alloy has been obtained via refining both the Si and Al microstructure based on the superheating effect during electron beam melting (EBM) manufacturing. Thus, the microstructure of cast Al-Si alloys (including Al-Si10, Al-Si20, and Al-Si30 alloys) is expected to be refined to enhance both the ductility and strength using this superheating effect.
By now, the mechanism of superheating effect for refining the microstructure of Al-Si alloy using EBM building process has been investigated. The higher temperature inner melting pool and the fast-cooling rate make the homogeneous melt liquid inner melt pool. During the cooling process especially when the temperature is decreased to 1300-1000 ℃, the Al and Si nanocluster occurred and form the fine grains in the solidification. Beside that, the single bead experiment on the surface of Al10Si, Al20Si and Al30Si have been conducted. The microstructure observation showed that EBM single bead could refine the microstructure in AlSi10 and AlSi20 alloy, but only can remelt part of the Al matrix in AlSi30 alloy.
|
