2013 Fiscal Year Final Research Report
Investigation of superelastic behavior of Fe-based intermetallic compounds by multi-scale in-situ observation
| Project/Area Number |
23360308
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Structural/Functional materials
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| Research Institution | Osaka University |
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Principal Investigator |
YASUDA Hiroyuki 大阪大学, 工学(系)研究科(研究院), 教授 (60294021)
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Keywords | 構造・機能材料 / 形状記憶合金 / 超弾性 / 電子顕微鏡 / 中性子回折 |
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| Research Abstract |
It is strongly suggested that Fe3Al, Fe3Ga and Fe3(Al,Ga) with the D03 structure exhibit superelasticity (pseudoelasticity) based on dislocation motion and twinning, which is quite different from shape memory alloys. The detailed mechanism, however, is still unclear. In this study, crystal structure, orientation, dislocation velocity and density etc. during loading were observed using multimode in situ observations composed of TEM, SEM-EBSP, J-PARC neutron diffraction and the mechanism of the superelasticity was clarified through in situ observations.
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