Skip to main content Accessibility help
×
Home

Internal Structure of B19 Martensite in AuTi Shape Memory Alloy

  • Tomonari Inamura (a1), Ryosuke Tachi (a2), Kenji Wakashima (a3) and Hideki Hosoda (a4)

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.

Copyright

References

Hide All
1. Saburi, T., “Ti-Ni Shape Memory Alloys”, Shape Memory Materials, ed. Otsuka, K. and Wayman, C.M. (Cambridge University Press, 1998) pp. 4996.
2. Biggs, T., Witcomb, M.J. and Cornish, L.A., Mater. Sci. Eng. A, 273–275, 204 (1999)10.1016/S0921-5093(99)00371-8
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-I
4. Donkersloot, H.C. and Vucht, J.H.N. Van, J. Less-Common Met., 20, 83 (1970)10.1016/0022-5088(70)90092-5
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)
6. Bozzolo, G., Mosca, H. O. and Noebe, R.D., J. Alloy. Compd, 425, 239 (2006)10.1016/j.jallcom.2006.04.022
7. Hosoda, H., Inoue, K., Enami, K. and Kamio, A., J. Intelligent Materials Systems and Structures, 7, 312 (1996)10.1177/1045389X9600700312
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.2006.01.123
9. Mackenzie, J. K. and Bowles, J. S., Acta metall., 2, 138 (1954)10.1016/0001-6160(54)90103-0
10. Nishida, M., Hara, T., Morizono, Y., Ikeya, A., Kijima, H. and Chiba, A., Acta mater, 45, 4847 (1997)10.1016/S1359-6454(97)00162-6
11. Lieberman, D.S., Wechsler, M.S. and Read, T.A., 1955, J. Appl. Phys, 26, 473 (1955)10.1063/1.1722021
12. Inamura, T., Kim, J. I., Kim, H.Y., Hosoda, H., Wakashima, K. and Miyazaki, S., Philos. Mag. (2007) (in press)
13. Bilby, B.A. and Crocker, A.G., Proc. Roy. Soc. Ser. A., 288, 240 (1965)
14. Miyazaki, S., Otsuka, K. and Wayman, C. M., Acta metall., 37, 1873 (1989)

Keywords

Related content

Powered by UNSILO

Internal Structure of B19 Martensite in AuTi Shape Memory Alloy

  • Tomonari Inamura (a1), Ryosuke Tachi (a2), Kenji Wakashima (a3) and Hideki Hosoda (a4)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed.