Mechanical Properties of (Pt, Ir)Ti


Article Preview

We have suggested B2-(Pt, Ir)Ti as high temperature shape memory alloys. The phase transformation of (Pt, Ir)-50at% Ti from B2 to B19(2H) or 4H(4O) structures was investigated in our previous study. The microstructure suggested martensitic transformation. In this study, thermal expansion measurement and cyclic compression test were performed for (Pt, Ir)Ti to investigate if the shape memory effect appears. High temperature strength was also investigated because phase transformation temperature of the (Pt, Ir)Ti is above 1273 K and high strength is necessary as high temperature shape memory alloys in order to suppress dislocation motion and stabilize martenstic transformation. The potential of (Pt, Ir)Ti as high temperature shape memory alloys will be also discussed.



Materials Science Forum (Volumes 475-479)

Main Theme:

Edited by:

Z.Y. Zhong, H. Saka, T.H. Kim, E.A. Holm, Y.F. Han and X.S. Xie




Y. Yamabe-Mitarai et al., "Mechanical Properties of (Pt, Ir)Ti", Materials Science Forum, Vols. 475-479, pp. 1987-1990, 2005

Online since:

January 2005




[1] V. Kolomytsev, Script Metall., Vol. 31, (1994), p.141.

[2] Y. F. Zheng, L. C. Zhao, and H. Q. Ye, Scripta Materialia, Vol. 38, No. 8, (1998), p.1249.

[3] Y. F. Zheng, L. C. Zhao, and H. Q. Ye, Mat. Sci. Eng., Vol. A 273-275, (1999), p.271.

[4] J. V. Humbeek and G. Firstov, The Fourth Pacific Rim Intl. Conf. On Advanced Materials Processing (PRICM-4), eds. S. Hanada, Z. Zhong, S. W. Nam and R. N. Wright, Jpn. Inst. Metals, Vol. 2, (2001), p.1871.

[5] H. Hosoda, M. Tsuji, M. Mimura, Y. Takahashi, K. Wakashima, and Y. Yamabe-Mitarai, Mat. Res. Soc. Proc. (2002).

[6] N. A. Matveeva, Yu. K. Kovneristyi, A. S. Savinov, V. P. Sivokha, and V. N. Khachin, J. Phys., 43, Vol. 12, (1982), C4-249.

[7] T. Biggs, M. J. Witcomb, L. A. Cornish, Mat. Sci. Eng. A, Vol. 273-275, (1999), p.204.

[8] T. B. Massalski, Binary Phase Diagrams, American Society of Metals, Ohio, USA, (1987).

[9] T. Biggs, M. B. Cortie, M. J. Witcomb, L. A. Cornish, Met. Trans A, Vol. 32A, (2001), p.1881.

[10] V. N. Eremenko and T. D. Shtepa, Russ. Met., Vol. 6, (1970), p.127.

[11] Y. Yamabe-Mitarai, T. Hara, H. Hosoda, Mat. Sci. Forum, 426-432, (2003), p.2267.

[12] T. Hara, Y. Yamabe-Mitarai, unpublished work (2003). Fig. 5 Shape recovery ratio as a function of Ir contents.