Influence of Al content on electrical resistivity and phase constitution of quenched .BETA. Ti-Mo-Al alloys.

勝彦, 池田; 伸也, 小松; 隆史, 杉本

doi:10.2464/jilm.50.435

Cited by 12 publications

(7 citation statements)

References 10 publications

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“…The present authors have obtained virtually the same results for Ti-Mo-Al alloys. 7) The above results revealed that the starting temperature of 00 -martensite transformation, M s , is lowered by Sn addition. Thus, the stability of the -phase presumably increases with the addition of Sn, even though Sn is a neutral additive in Ti alloys.…”

Section: Resultsmentioning

confidence: 70%

Effects of Sn and Zr Additions on Phase Constitution and Aging Behavior of Ti-50 mass%Ta Alloys Quenched from β Single Phase Region

2004

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Using Ti-50Ta, Ti-50Ta-Sn and Ti-50Ta-Zr alloys, the effects of Sn and Zr additions on phase constitution in the solution treated and quenched state and aging behavior were studied by electrical resistivity and Vickers hardness measurements and X-ray diffactometry. All alloys were solution treated at 1173 K for 3.6 ks and then quenched into ice water (STQ). STQed specimens were isochronally aged at temperatures up to 1323 K in Ti-50Ta-Sn alloys and 1173 K in Ti-50Ta-Zr alloys. Shape recovery test was also performed in bent Ti-50Ta, Ti-50Ta-Sn and Ti50Ta-Zr alloy specimens. In the STQed state, only reflections of orthorhombic 00 martensite were observed by XRD in Ti-50Ta and Ti-50Ta-4Sn alloys. In STQed Ti-50Ta-10Zr alloy, coexistence of 00 and (bcc) phases were found by XRD. In STQed Ti-50Ta-8Sn and Ti-50Ta-20Zr alloys, only phase was identified. In Ti-50Ta, Ti-50Ta-4Sn and Ti-50Ta-10Zr alloys, resistivity at liquid nitrogen temperature and resistivity ratio increased with isochronal aging up to a certain temperature. It is considered that these increases are due to reverse-transformation of 00 into metastable phase. Shape-recovery test confirmed the shape memory effect of Ti-50Ta, 50Ta-4Sn and 50Ta-10Zr alloys.

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Section: Resultsmentioning

confidence: 70%

Effects of Sn and Zr Additions on Phase Constitution and Aging Behavior of Ti-50 mass%Ta Alloys Quenched from β Single Phase Region

2004

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“…Only phase was detected in Ti-6.0Mo and Ti-3.0 to 7.0Sc-6.0Mo alloys. In Ti-1.0Sc- 6.0Mo and Ti-2.0Sc-6.0Mo alloys, þ 00 phases were identified. In addition to these two phases, Sc oxide was detected in all the ternary alloys.…”

Section: Resultsmentioning

confidence: 99%

“…The decrease and increase of hardness with increasing the content of stabilizing element has been reported in several -titanium alloys where no martensitic phase forms. 6,9) The origin of hardness change in those alloys is well explained by the mutual effect of volume fraction change in athermal ! phase and solid solution strengthening of stabilizing element.…”

Section: Resultsmentioning

confidence: 99%

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Shape Memory and Mechanical Properties of Biomedical Ti-Sc-Mo Alloys

Mishima

Nishida

2004

Mater. Trans.

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Ni-free Ti-Sc-Mo shape memory alloys are designed as a substitute for Ti-Ni alloys in the biomedical field. From results of bending and recovery test with heating, Ti-Sc-Mo alloys were found to have superior shape memory effect. The optimum composition for the shape memory effect was Ti-4.0 to 6.0Sc-6.0Mo alloys. The maximum shape recovery strain in the Ti-5.0Sc-6.0Mo alloy was 5.3% measured through cyclic tensile deformation. Vickers hardness and 0.2% proof stress were remarkably decreased and elongation was increased with Sc content. The marked grain refining was also achieved. The relationship between microstructure and mechanical properties was briefly discussed. Microstructure observations and XRD measurements before and after tensile deformation showed that the shape memory effect was associated with the stress induced to 00 transformation.

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“…phase formation and sold solution strengthening by Sn as well as Al in Ti-Mo-Al alloys. 7) Al is also typical stabilizing element. In Ti-Mo-Al alloys, the M s temperature increases with decreasing the athermal !…”

Section: Resultsmentioning

confidence: 99%

Shape Memory Properties of Biomedical Ti-Mo-Ag and Ti-Mo-Sn Alloys

2004

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Shape memory properties of Ti-Mo-Ag and Ti-Mo-Sn alloys consisting of biocompatible elements were investigated. The alloys with appropriate combination of Mo and Ag or Sn showed nearly perfect shape memory effect in convenient bending and heating tests. Recoverable tensile strain is more than 3% in some of Ti-Mo-Ag and Ti-Mo-Sn alloys. Microstructure observations and X-ray diffraction measurements before and after tensile test revealed that stress induced to 00 martensitic transformation was origin of the shape memory effect.

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Influence of Al content on electrical resistivity and phase constitution of quenched .BETA. Ti-Mo-Al alloys.

Cited by 12 publications

References 10 publications

Effects of Sn and Zr Additions on Phase Constitution and Aging Behavior of Ti-50 mass%Ta Alloys Quenched from β Single Phase Region

Effects of Sn and Zr Additions on Phase Constitution and Aging Behavior of Ti-50 mass%Ta Alloys Quenched from β Single Phase Region

Shape Memory and Mechanical Properties of Biomedical Ti-Sc-Mo Alloys

Shape Memory Properties of Biomedical Ti-Mo-Ag and Ti-Mo-Sn Alloys

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Influence of Al content on electrical resistivity and phase constitution of quenched .BETA. Ti-Mo-Al alloys.

Cited by 12 publications

References 10 publications

Effects of Sn and Zr Additions on Phase Constitution and Aging Behavior of Ti-50 mass%Ta Alloys Quenched from &beta; Single Phase Region

Effects of Sn and Zr Additions on Phase Constitution and Aging Behavior of Ti-50 mass%Ta Alloys Quenched from &beta; Single Phase Region

Shape Memory and Mechanical Properties of Biomedical Ti-Sc-Mo Alloys

Shape Memory Properties of Biomedical Ti-Mo-Ag and Ti-Mo-Sn Alloys

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Effects of Sn and Zr Additions on Phase Constitution and Aging Behavior of Ti-50 mass%Ta Alloys Quenched from β Single Phase Region

Effects of Sn and Zr Additions on Phase Constitution and Aging Behavior of Ti-50 mass%Ta Alloys Quenched from β Single Phase Region