2016 Fiscal Year Final Research Report
Evaluation of Fatigue Damage in Pure Titanium using EBSD Method
| Project/Area Number |
25420018
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Materials/Mechanics of materials
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| Research Institution | Meijo University (2014-2016)
Okayama University (2013) |
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Principal Investigator |
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| Project Period (FY) |
2013-04-01 – 2017-03-31
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| Keywords | 疲労 / き裂 / 純チタン / 結晶方位 / EBSD法 |
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| Outline of Final Research Achievements |
Pure titanium films with rolling texture were fatigued. The crystallographic information was analyzed using the Electron Back-scatter Diffraction (EBSD) system and a misorientation vector was estimated as the axis of misorientation angle. As a result, fatigue cracks propagated faster in the specimen loaded to the rolling direction than in that loaded to the transverse direction. Using the misorienation vector, the active slip system with crack propagation was estimated. It is found that the fatigue crack propagated by two prismatic slip systems in the specimen loaded to the rolling direction. On the other hand, the fatigue crack seems to propagate by one basal slip system in the specimen loaded to the transverse direction. The basal slip hardly operates because the slip is limited in one plane and the fatigue crack propagation is decelerated in the specimen loaded to the transverse direction.
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| Free Research Field |
材料強度学
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