Mechanical Properties and Shape Memory Behavior of Ti-Mo-Ga Alloys
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- Kim Hee Young
- Institute of Materials Science, University of Tsukuba
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- Ohmatsu Yoshinori
- Institute of Materials Science, University of Tsukuba
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- Kim Jae Il
- Institute of Materials Science, University of Tsukuba
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- Hosoda Hideki
- Precision and Intelligence Laboratory, Tokyo Institute of Technology
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- Miyazaki Shuichi
- Institute of Materials Science, University of Tsukuba
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Mechanical properties and shape memory behavior of Ti-Mo-Ga alloys were investigated in order to develop Ni-free biomedical shape memory alloys. The Ti-Mo-Ga alloys were fabricated by arc melting method. The ingots were cold-rolled up to 95% reduction in thickness. The cold-rolled specimens were heat treated in the temperature range 673—1273 K for 60 s—3.6 ks. The martensitic transformation temperature decreased with increase in Mo and Ga content. The maximum shape recovery strain was obtained in a solution treated Ti-6 at%Mo-3 at%Ga alloy. Mechanical properties and shape memory behavior strongly depend on heat treatment condition in the Ti-6 at%Mo-3 at%Ga. Premature failure was observed in specimens heat treated in the temperature range 673—773 K. Ultimate tensile strength decreased and fracture strain increased with increasing heat treatment temperature. Shape memory effect was obtained in specimens heat treated in the temperature range 1073—1273 K. The shape memory effect was due to the stress induced martensitic transformation yielding tensile deformation and the reverse transformation upon heating after unloading. The martensitic transformation start temperature increased and the yield stress decreased with increasing heat treatment temperature and time. Stable superelastic behavior was obtained in a Ti-7 at%Mo-4 at%Ga alloy at room temperature by cyclic tensile tests. The recovery strain exceeding 4% was achieved in the pre-strained Ti-7 at%Mo-4 at%Ga alloy.
収録刊行物
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 45 (4), 1090-1095, 2004
公益社団法人 日本金属学会
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詳細情報 詳細情報について
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- CRID
- 1390001204250247552
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- NII論文ID
- 130004452432
- 10012905584
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- NII書誌ID
- AA1151294X
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- COI
- 1:CAS:528:DC%2BD2cXksVyhtbw%3D
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- ISSN
- 13475320
- 13459678
- http://id.crossref.org/issn/09161821
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- NDL書誌ID
- 6927150
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 使用不可