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The Martensitic Transformation and Extra Reflections Appearing Prior to the Transformation in AuCd Alloy

Published online by Cambridge University Press:  10 February 2011

T. Ohba  and
K. Otsuka
T. Ohba
Affiliation:
Department of Materials Science and Engineering, Teikyo University, Toyosatodai, Utsunomiya 320, Japan, ohba@koala.mse.teikyo-u.ac.jp
K. Otsuka
Affiliation:
Institute of Materials Science, University of Tsukuba, Tsukuba 305, Japan
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Abstract

AuCd alloy is a typical martensitic alloy. The crystal structural of the ζ2' (trogonal) martensite was recently determined and the analysis indicated the possibility of phonon softening. Despite a large absorption coefficient of Cd phonon softening was actually observed by using an isotope 114Cd. In the present study, precise x-ray scattering studies were performed with a rotating anode x-ray source and synchrotron radiation at Photon Factory in KEK, using small crystals. The structure factors of the parent phase and the diffraction profiles along <110> direction were measured with four circle diffractometers. The structure factors decrease when approaching the transformation temperature. Superstructure reflections were observed prior to the onset of the transformation. They are very weak and rather sharp and appear at q = (1/3,1/3,0) within the experimental error, i. e. at the commensurate position.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 459: Symposium Y – Materials for Smart Systems II , 1996 , 295
Copyright
Copyright © Materials Research Society 1997

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References

REFERENCES

1. Wechsler, M. S., Lieberman, D. S. and Read, T. A., Trans. AIME, 197 (1953), p. 1503–1515 Google Scholar
2. Bowles, J. S. and Mackenzie, J. K., Acta Metall., 2 (1954), p. 129-, p. 138-, p. 224–234.Google Scholar
3. Lieberman, D. S., Wechsler, M. S. and Read, T. A., J. Appl. Phys., 26 (1955), p. 473–484.Google Scholar
4. Morii, Y. and Iizumi, M., Physical, J.. Soc. Jpn., 54 (1985), p. 2948–2954.Google Scholar
5. Mori, M., Yamada, Y. and Shirane, G., Solid State Communications, 17 (1975), p. 127–130.Google Scholar
6. Nagasawa, A., Makita, T., Nakanishi, N., Iizumi, M. and Morii, Y., Metall. Trans. 19A (1988), p. 793–796.Google Scholar
7. Finlayson, T. R. and Smith, H. G., Metall. Trans. 19A (1988), p. 193–198.Google Scholar
8. Satija, S. K., Shapiro, S. M., Salamon, M. B. and Wayman, C. W., Physical Rev. B29 (1984), p. 6031–6035.Google Scholar
9. Tietze, H., Mullner, M., Selgert, P. and Assmus, W., J. Phys., F15 (1985), p. 263–271.Google Scholar
10. Moine, P., Allain, J. and Renker, B., J. Phys., F14 (1984), p. 2517–2523.Google Scholar
11. Shapiro, S. M., Noda, Y., Fujii, Y. and Yamada, Y., Phys. Rev. B30 (1984), p.4314–4321.Google Scholar
12. Yamada, Y., Noda, Y. and Takimoto, M., Solid State Communications, 55 (1985), p. 1003–1006.Google Scholar
13. Yamada, Y., Proceedings of the International Conference on Martensitic Transformations, (1986), p. 89–94.Google Scholar
14. Gooding, R. J. and Krumhansl, J. A., Phys. Rev. B39 (1989), p. 1535–1540.Google Scholar
15. Tadaki, T. and Wayman, C. M.: Metallography, 15 (1982) 233–245.Google Scholar
16. Meichele, M., Salamon, M. B. and Wayman, C. M.: Phil. Mag., A47 (1983) 177 Google Scholar
17. Hwang, C. M. and Wayman, C. M.: Acta Metall., 32 (1984) 183.Google Scholar
18. Ölander, A., J. Am. Chem. Soc., 54 (1932), p. 3819.Google Scholar
19. Ohba, T., Emura, Y., Miyazaki, S. and Otsuka, K., Materials Trans. JIM, 31 (1990), p. 12–17.Google Scholar
20. Köster, W. and Schneider, A., Z. Metalik. 32 (1940), p. 156.Google Scholar
21. Ohba, T., Emura, Y., Otsuka, K., Materials Trans. JIM. 33 (1992), p. 29–37.Google Scholar
22. Ohba, T., Shapiro, S. M., Aoki, S. amd Otsuka, K., Jpn. J. Appl. Phys. 33 (1994), p. L1631–L1633.Google Scholar
23. Noda, Y., Takimoto, M., Nakagawa, T. and Yamada, Y., Metall. Trans. 19A (1988), p. 265–271.Google Scholar
24. International Tables for X-ray Crystallography Vol. IV, Kluwer Academic Publishers, Dordrecht 1989), p. 275–284.Google Scholar
25. Roitburd, A. L., Mater. Sci. Eng., A127 (1990), p. 229.Google Scholar
26. Abe, H., Ohshima, K. and Suzuki, T., Materials Trans. JIM, 36 (1995), p. 1200–1205.Google Scholar
27. Kakeshita, T., Kuroiwa, K., Shimizu, K., Ikeda, T., Yamagishi, A. and Date, M., Mater. Trans. JIM, 34 (1993), p. 423–428.Google Scholar