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자료유형
학술저널
저자정보
저널정보
대한기계학회 Journal of Mechanical Science and Technology Journal of Mechanical Science and Technology Vol.20 No.1
발행연도
2006.1
수록면
13 - 18 (6page)

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Ti-8Ta-3Nb, as a new biomaterial, was prepared by cast and swaging process. Their deformation behavior of Ti-8Ta-3Nb alloy has been characterized on the basis of its flow stress variation obtained from the true strain rate compression testing in the temperature of 700-900℃ and strain rate of 0.001-10 s-¹. At the strain rates lower than 0.1 s-¹ and the all temperature ranges which consist of two phase α + β as well as single β phase fields, the flow curves show a small degree of flow softening behavior. In contrast, the shapes of the flow curves at other strain rates indicate unstable behavior. The shapes of the flow curves were similar in both as cast and swaged specimen as well as in both α + β phase and β phase. The flow stress data did not obey the kinetic rate equation over the entire regime of testing but a good fit has been obtained in the intermediate range of temperatures (750-850℃). In this range, a stress exponent value of about 7.7 in as-cast specimens and about 6.2 in swaged specimens with an apparent activation energy of about 300 kJ/mol and about 206 kJ/mol respectively have been evaluated.

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Abstract

1. Introduction

2. Experimental

3. Results and Discussion

4. Conclusions

References

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