2013 Fiscal Year Final Research Report
Beneficial use of interstitial elements amd work hardening mechanism in high strength titanium alloys
| Project/Area Number |
23560840
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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 |
Structural/Functional materials
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| Research Institution | Kyushu University |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
MOROOKA Satoshi 首都大学東京, システムデザイン学部システムデザイン学科, 助教 (10534422)
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| Project Period (FY) |
2011 – 2013
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| Keywords | チタン合金 / 侵入型元素 / 酸素 / 窒素 / 機械的性質 / 強度-延性バランス |
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| Research Abstract |
High oxygen or nitrogen titanium alloys were produced on the basis of a low alloy titanium alloy consisting of conventional alloying elements, and then the microstructure and mechanical property were investigated. As a result, the microstructure was hardly influenced by oxygen and nitrogen, while the strength of the alloys were greatly increased without deteriorating ductility too much. The reason of the improvement of mechanical property due to oxygen and nitrogen addition was discussed in terms of the strength ratio of alpha phase to beta phase,and then it was clarified by theoretical considerations of the strain uniformity effect as well as the positive work hardenability effect of beta phase.
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