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Internal Structure of B19 Martensite in AuTi Shape Memory Alloy

Published online by Cambridge University Press:  26 February 2011

Tomonari Inamura ,
Ryosuke Tachi ,
Kenji Wakashima  and
Hideki Hosoda
Tomonari Inamura
Affiliation:
inamura@pi.titech.ac.jp, Tokyo Institute of Technology, Precision and Intelligence Labortory, 4259Nagatsuta, Midori, Yokohama, 226-8503, Japan, +81-45-924-5061, +81-45-924-5061
Ryosuke Tachi
Affiliation:
tachi@ken.pi.titech.ac.jp, Tokyo Institute of Technology, Graduate student, 4259Nagatsuta, Midori, Yokohama, 226-8503, Japan
Kenji Wakashima
Affiliation:
wakashima.k.aa@m.titech.ac.jp, Tokyo Institute of Technology, Precision and Intelligence Labortory, 4259Nagatsuta, Midori, Yokohama, 226-8503, Japan
Hideki Hosoda
Affiliation:
hosoda.h.aa@m.titech.ac.jp, Tokyo Institute of Technology, Precision and Intelligence Labortory, 4259Nagatsuta, Midori, Yokohama, 226-8503, Japan
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Abstract

Internal twin of B19 martensite in equiatomic AuTi binary alloy was examined by conventional transmission electron microscopy observation and the phenomenological theory of martensite crystallography (PTMC). The crystal structure of martensite was B19 (orthorhombic) with the lattice parameters of 0.2944nm, 0.4900nm and 0.4633nm. Most of martensite plates were internally twinned by {111}typeI twin. <211>typeII twin was occasionally observed and {011}compound-twin relationship was observed at boundaries between adjacent martensite plates. However, no martensite plate entirely twinned by the <211>typeII twinning or the {011}compound twinning was observed. PTMC analysis showed that the invariant plane is formed only by the introduction of the internal twin of {111}typeI or <211>typeII twin in the present geometry of the transformation. Geometry of a typical martensite plate with internal twin of {111}typeI twin was in good agreement with that required for the formation of habit plane with the invariant plane character. The observed {111}typeI twin is, therefore, considered to be the lattice invariant shear to minimize the elastic strain energy due to the transformation.

Keywords

phase transformationtransmission electron microscopy (TEM)microstructure
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 980: Symposium II – Advanced Intermetallic-Based Alloys , 2006 , 0980-II04-12
Copyright
Copyright © Materials Research Society 2007

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References

REFERENCES

1. Saburi, T., “Ti-Ni Shape Memory Alloys”, Shape Memory Materials, ed. Otsuka, K. and Wayman, C.M. (Cambridge University Press, 1998) pp. 49–96.Google Scholar
2. Biggs, T., Witcomb, M.J. and Cornish, L.A., Mater. Sci. Eng. A, 273–275, 204 (1999)10.1016/S0921-5093(99)00371-8Google Scholar
3. Otsuka, K., Oda, K., Ueno, Y., Piao, M., Ueki, T. and Horikawa, H., Scripta metall., 29, 1355 (1993)10.1016/0956-716X(93)90138-IGoogle Scholar
4. Donkersloot, H.C. and Vucht, J.H.N. Van, J. Less-Common Met., 20, 83 (1970)10.1016/0022-5088(70)90092-5Google Scholar
5. Humbeek, J.V. and Firstov, G., The Fourth Pacific Rim International Conference on Advanced Materials and Processing (PRICM4), ed. Hanada, S. et al., 2, 1871 (JIM, 2001)Google Scholar
6. Bozzolo, G., Mosca, H. O. and Noebe, R.D., J. Alloy. Compd, 425, 239 (2006)10.1016/j.jallcom.2006.04.022Google Scholar
7. Hosoda, H., Inoue, K., Enami, K. and Kamio, A., J. Intelligent Materials Systems and Structures, 7, 312 (1996)10.1177/1045389X9600700312Google Scholar
8. Kawamura, T., Tachi, R., Inamura, T., Hosoda, H., Wakashima, K., Hamada, K. and Miyazaki, S., Mater. Sci. Eng. A, 438–440, 383 (2006)10.1016/j.msea.2006.01.123Google Scholar
9. Mackenzie, J. K. and Bowles, J. S., Acta metall., 2, 138 (1954)10.1016/0001-6160(54)90103-0Google Scholar
10. Nishida, M., Hara, T., Morizono, Y., Ikeya, A., Kijima, H. and Chiba, A., Acta mater, 45, 4847 (1997)10.1016/S1359-6454(97)00162-6Google Scholar
11. Lieberman, D.S., Wechsler, M.S. and Read, T.A., 1955, J. Appl. Phys, 26, 473 (1955)10.1063/1.1722021Google Scholar
12. Inamura, T., Kim, J. I., Kim, H.Y., Hosoda, H., Wakashima, K. and Miyazaki, S., Philos. Mag. (2007) (in press)Google Scholar
13. Bilby, B.A. and Crocker, A.G., Proc. Roy. Soc. Ser. A., 288, 240 (1965)Google Scholar
14. Miyazaki, S., Otsuka, K. and Wayman, C. M., Acta metall., 37, 1873 (1989)Google Scholar