2009 Fiscal Year Final Research Report
The development of Fe_3Al base heat resistant alloys with specificstrength as high as Ti alloys
| Project/Area Number |
20760461
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Structural/Functional materials
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| Research Institution | Tohoku University |
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Principal Investigator |
KOBAYASHI Satoru Tohoku University, 金属材料研究所, 助教 (60455847)
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| Project Period (FY) |
2008 – 2009
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| Keywords | 強度 / 靭性 / 破壊 / 疲労 / クリープ / 応力腐食割れ / 超塑性 / 磨耗 |
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| Research Abstract |
The study is aimed at developing heat resistant Fe_3Al base alloys with high specific strength to replace commercial Ti alloys and heat resistant steels. The objective of this study was two-fold. First, to study the strengthening mechanism of thermomechanically processed Fe_3Al alloys. Second, to investigate high temperature strength and microstructural stability of thermomechanically processed Fe_3Al alloys. The main results are :
(1) The introduction of relatively fine κ-Fe_3AlC carbide particles into the matrix during warm rolling promotes the subdivision of matrix grains and is thus effective for strengthening the alloys at relatively low temperatures.
(2) The addition of a small amount of Mo into the alloys is beneficial to enhance 0.2% proof stress below 600℃ and the microstructural stability at high temperatures.
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