2013 Fiscal Year Final Research Report
Microstructure refinement of steels by intragranular nucleation in displacive transformation
| Project/Area Number |
23686098
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| Research Category |
Grant-in-Aid for Young Scientists (A)
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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 |
MIYAMOTO Goro 東北大学, 金属材料研究所, 准教授 (60451621)
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Keywords | せん断型変態 / 組織微細化 / マルテンサイト / ベイナイト |
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| Research Abstract |
In order to refine microstructure of displacive transformation, intragranular nucleation, which has been used in the diffusional transformation, has been applied. It was found that, unlike to diffusional transformation, effects of inclusion or precipitates within matrix grains are small while deformation prior to transformation accelerates intragranulear nucleation of martensite or baintie, leading to refinement of microstructure.
Furthermore, novel characterization method has been developed on a basis of precise measurement of orientation relationship between product and matrix phases and reconstruction method of austenite matrix.
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