2014 Fiscal Year Final Research Report
Fine Dispersion of Laves Phase Precipitation in Heat Resistant Ferritic Steels: Use in the reaction path from delta ferrite to austenite+Laves
| Project/Area Number |
25820360
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Structural/Functional materials
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| Research Institution | Tokyo Institute of Technology (2014)
National Institute for Materials Science (2013) |
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Principal Investigator |
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| Project Period (FY) |
2013-04-01 – 2015-03-31
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| Keywords | 組織制御 / 析出 / 状態図 |
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| Outline of Final Research Achievements |
In the present study we investigated precipitation of Fe2M (Laves) phase along a eutectoid-type transformation pathway from delta ferrite to austenite + Laves to aim at establishing a new microstructure controlling method in heat resistant ferritic steels. The main results are: (1) There are two types of precipitation sequences: interphase precipitation and pearlite type reaction. (2) The interphase precipitation takes place only in a very short time period at high temperatures, which indicates that it is necessary to slow down the reaction to use it in practice. (3) Pearlite type reaction is about 3 orders of magnitude slower than the interphase precipitation, which can be easily applied into practical thermomechanical processing.
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| Free Research Field |
金属組織学 耐熱材料 耐熱鋼
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