2017 Fiscal Year Final Research Report
Establishment of procedures to obtain the maximum TRIP effect
| Project/Area Number |
26289264
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Structural/Functional materials
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| Research Institution | University of Hyogo |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
Stefanus Harjo 国立研究開発法人日本原子力研究開発機構, その他部局等, 研究員 (40391263)
友田 陽 茨城大学, その他部局等, 名誉教授 (90007782)
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| Project Period (FY) |
2014-04-01 – 2018-03-31
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| Keywords | 鉄鋼 / TRIP効果 / 強度 / 延性 |
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| Outline of Final Research Achievements |
The maximum TRIP effect due to the effective use of retained austenite was studied by using a TRIP steel. Tensile tests with a wide range of temperature and strain rate were conducted. In situ neutron diffraction experiments during tensile deformation were performed to discuss the deformation-induced transformation behavior and the contribution of each phase to flow stress. We can make clear the results of deformation-induced martensite which was difficult to show quantitatively for the first time. Room-temperature creep tests under constant load were also conducted using the TRIP steel. The volume fractions of deformation-induced martensite at a given true strain obtained from constant load creep tests were larger than those from tensile tests. Based on the experimental results from several viewpoints, the test condition and deformation-induced transformation behavior to obtain the uniform elongation 1.5 times as large as that at 296 K can be clarified.
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| Free Research Field |
鉄鋼材料
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