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Plastic Deformation of Mo(Si,Al)2 Single Crystals with the C40 Structure

Published online by Cambridge University Press:  15 February 2011

M. Moriwaki ,
K. Ito ,
H. Inui  and
M. Yamaguchi
M. Moriwaki
Affiliation:
Dept. of Materials Science & Engineering, Kyoto University, Sakyo-ku, Kyoto 606–01, Japan.
K. Ito
Affiliation:
Now at Dept. of Materials Science & Engineering, University of Pennsylvania, 3231 Walnut Street, Philadelphia, PA 19104–6272, U.S.A.
H. Inui
Affiliation:
Dept. of Materials Science & Engineering, Kyoto University, Sakyo-ku, Kyoto 606–01, Japan.
M. Yamaguchi
Affiliation:
Dept. of Materials Science & Engineering, Kyoto University, Sakyo-ku, Kyoto 606–01, Japan.
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Abstract

The deformation behavior of single crystals of Mo(Si,Al)2 with the C40 structure has been studied as a function of crystal orientation and Al content in the temperature range from room temperature to 1500°C in compression. Plastic flow is possible only above 1100°C for orientations where slip along <1120> on (0001) is operative and no other slip systems are observed over whole temperature range investigated. The critical resolved shear stress for basal slip decreases rapidly with increasing temperature and the Schmid law is valid. Basal slip appears to occur through a synchroshear mechanism, in which a-dislocations (b=1/3<1120>) dissociate into two synchro-partial dislocations with the identical Burgers vector(b*1/6<1120>) and each synchro-partial further dissociates into two partials on two adjacent planes.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 460: Symposium Z – High-Temperature Ordered Intermetallic Alloys VII , 1996 , 605
Copyright
Copyright © Materials Research Society 1997

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References

REFERENCES

[1] Vasudevan, A.K. and Petrovic, J.J., Mater. Sei. Eng. A, 155, 1 (1992).Google Scholar
[2] Boettinger, W.J., Perepezko, J.H. and Frankwicz, P.S., Mater. Sei. Eng. A, 155. 33 (1992).Google Scholar
[3] Shah, D.M., Berezik, D., Anton, D.L. and Hecht, R., Mater. Sci. Eng. A, 155, 45 (1992).Google Scholar
[4] Ito, K., Yano, T., Nakamoto, T., Inui, H. and Yamaguchi, M., Interrnetallics, 4, S119 (1996).Google Scholar
[5] Evans, D.J., Court, S.A., Hazzledine, P.M. and Fraser, H.L., Phil. Mag. Lett., 67, 331 (1993).Google Scholar
[6] Maloy, S.A., Mitchell, T.E. and Heuer, A.H., Acta Metall. Mater., 43, 657 (1995).Google Scholar
[7] Ito, K., Inui, H., Shirai, Y. and Yamaguchi, M., Phil. Mag. A, 72, 1075 (1995).Google Scholar
[8] Umakoshi, Y., Nakashima, T., Nakano, T. and Yanagisawa, E., in High Temperature Suicides and Refractory Alloys, edited by Briant, C.L., Petrovic, J.J., Bewlay, B.P., Vasudevan, A.K. and Lipsitt, H.A. (Mater. Res. Soc. Proc. 322, Pittsburgh, PA, 1994), p. 9–20.Google Scholar
[9] Ito, K., Moriwaki, M., mui, H. and Yamaguchi, M., Phil. Mag. A, to be published (1997).Google Scholar