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An Investigation on Dynamic Tensile Properties of TiAl Intermetallic Alloy

Published online by Cambridge University Press:  10 February 2011

Yu Wang ,
Dongliang Lin ,
Yuanxing Zhou ,
Yuanming Xia  and
Chi C. Law
Yu Wang
Affiliation:
School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200030, P. R. China
Dongliang Lin
Affiliation:
School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200030, P. R. China
Yuanxing Zhou
Affiliation:
Department of Modem Dynamics, University of Science and Technology of China, Hefei, Anhui Province, 230026, P. R. China
Yuanming Xia
Affiliation:
Department of Modem Dynamics, University of Science and Technology of China, Hefei, Anhui Province, 230026, P. R. China
Chi C. Law
Affiliation:
Materials and Mechanics Engineering, United Technologies Company–Pratt & Whittney, 400 Main Street, East Hartford, CT 06108, U. S. A.
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Abstract

Room-temperature tensile properties of polycrystalline Ti–;47A1–2Mn–;2Nb alloy with nearly lamellar (NL) microstructures were investigated at the strain rates between 10-;5 and 1000 s-1 using a self-designed Split-Hopkinson tensile bar setup with a rotating disk and conventional testing machine. It was found that tensile ductility varies within a narrow range with the strain rate while dynamic strengths (σd) of the alloy are obviously higher than static strengths (σs). There exists a linear relationship between σs and the logarithm of the strain rate , and between σ d and the strain rate itself (). Fractography analysis indicated that the alloy fractured in a mixed mode of predominant transgranular cleavage and minor intergranular cracking under static and dynamic strain rates. Environmental effect was excluded from the main cause for the room-temperature brittleness of the investigated alloy.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 552: Symposium KK – High-Temperature Ordered Intermetallic Alloys VIII , 1998 , KK5.5.1
Copyright
Copyright © Materials Research Society 1999

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References

REFERENCES

1. Kim, Y-W., Journal of Metals 46, 30 (1994).Google Scholar
2. Chin, E. S. C., Weerasooriya, T., Woolsey, P., in Gamma Titanium Aluminides edited by Kim, Y.-W, Wagner, R. and Yamaguchi, M, (TMS, Warrendale, PA, 1995), p451.Google Scholar
3. Maloy, S. A., IIIGray, G. T., Acta, Mater. 44, 1741 (1996).CrossRefGoogle Scholar
4. IIIGray, G. T., J. de Phys. IV, 4, C8–373 (1994).Google Scholar
5. Maloy, S. A. and Gray, G. T. III, in Gamma Titanium Aluminides, edited by Kim, Y-W., Wagner, R., and Yamaguchi, M., (TMS, Warrendale, PA, 1995), p307.Google Scholar
6. Jim, Z., IIIGray, G. T., Kim, Y.-W., accepted by Metall. Trans. A, (1998).Google Scholar
7. Harbison, L. S., Koss, D. A. and Boucier, R. J., in Titanium'92, Science and Technology, edited. by Froes, F H. and Caplan, I., (TMS, Warrendale, PA.,1993), p1661.Google Scholar
8. Sun, Z M, Kobayashi, T, Fukumasu, H, Yamamoto, I., Shibue, K., Metall. Mater. Trans. A 29, 263 (1998).CrossRefGoogle Scholar
9. Wang, Y., Lin, D., Kim, Y-W., “High-Strain-Rate Tensile Properties of Ti-47at%AI-1.5at%Cr- 0.5at%Mn-2.8at%Nb with Duplex and Fully Lamellar Microstructures”, Trans. Nonferrous Metals Soc. China, in press.Google Scholar
10. Lin, D., Wang, Y., Law, C. C., Mater. Sci. Eng. A, 239/240 369 (1997)CrossRefGoogle Scholar
11. Wang, Z., Zhou, Y., Xia, Y, J. Mater. Sci. 32, 2387 (1997).CrossRefGoogle Scholar
12. Schechtman, D., Blackburn, M., Lipitt, H. A., Metall. Trans. 5, 2 (1974).Google Scholar
13. Yoo, M. H. and Liu, C. T., ISIJ International., 31 1049 (1991).CrossRefGoogle Scholar
14. Kim, Y-W., Acta Metall. 40, 1121 (1992).CrossRefGoogle Scholar
15. Liu, C. T. and Kim, Y-W., Scrip. Metall. Mater. 27, 599 (1992).CrossRefGoogle Scholar
16. Nadgornyi, E., Prog. Mater. Sci. 31, 1 (1988).CrossRefGoogle Scholar
17. Regazzoni, G., Kocks, U. F., Follansbee, P. S., Acta Metall. 35, 2865 (1987).CrossRefGoogle Scholar