Abstract
Combined tension and torsion experiments with thin wall specimens of Cu-Al-Zn-Mn polycrystalline shape memory alloy (SMA) were performed at temperatureT =A f + 25 K. The general stress-strain behaviors due to the thermoelastic martensitic transformation, induced by a combination of external forces of axial load and torque, were studied. It is shown that the progress of martensitic transformation (MT) at general stress conditions can be well considered as triggered and controlled by the supplied mechanical work (a kind of equivalent stress) in the first approximation. Pseudoelastic strains in proportional as well as nonproportional combined tension-torsion loadings were found fully reversible, provided that uniaxial strains were reversible. The axial strain can be controlled by the change of torque andvice versa due to the coupling among tension and torsion under stress, not only in forward transformation, but also in reverse transformation on unloading. The pseudoelastic strains of SMA polycrystal are path dependent but well reproducible along the same stress path. The evolution of macroscopic strain response of SMA polycrystal, subjected to the nonproportional pseudoelastic loading cycles with imposed stress path, was systematically investigated. The results bring qualitatively new information about the progress of the MT in SMA polycrystal, subjected to the general variations of external stress.
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References
K. Otsuka and K. Shimizu:Int. Met. Rev., 1986, vol. 31, pp. 93–114.
P. Wollants, J.R. Roos, and L. Deleay:Prog. Mater. Sci., 1993, vol. 37, pp. 227–88.
M. Kato and H. Pak:Phys. Status Solidi B, 1984, vol. 123, pp. 415–24.
Ping Xu and J.W. Morris:Metall. Trans. A, 1993, vol. 24A, pp. 1281–94.
K. Tanaka, E.R. Oberaigner, and F.D. Fisher:AMD—Vol. 189 Mechanics of Phase Transformations and Shape Memory Alloys, ASME, Fairfield, NJ, 1984, vol. 292, pp. 151–57.
E. Patoor, A. Eberhardt, and M. Berveiller:Pitman Res. Notes Math. Ser., 1993, vol. 296, pp. 38–54.
P. Sittner and M. Tokuda:Proc. 43rd Natl. Congr. on Theoretical Mechanics, The Japanese Society of Mechanical Engineers, Tokyo, Japan, 1994, pp. 667–71.
T.E. Buchheit and J.A. Wert:Metall. Mater. Trans. A, 1994, vol. 25A, pp. 2383–89.
E. Patoor, M. El Amrani, A. Eberhardt, and M. Berveiller:Proc. ESOMAT 94, 1994, to appear inJ. Phys.
P. Sittner, M. Takakura, and M. Tokuda:Sc. Metall. Mater, 1995, vol. 32, pp. 2073–79.
P. Sittner and M. Tokuda:Proc. 15 Risø Int. Symp.—Numerical Prediction of Deformation Processes and The Behavior of Real Materials, ed. S.I. Andersen, J.B. Bilde-Sorensen, T. Lorentzen, O.B. Pedersen, N.J. Sorensen, Risø National Laboratory, Roskilde, Denmark, 1994, pp. 537–41.
P. Sittner, Y. Hara, and M. Tokuda:Proc. Shape Memory Materials 94, ed. Chu Youi and Tu Hailing, International Academic Publishers, Beijing, China, 1994, pp. 541–45.
P. Sittner, Y. Hara, and M. Tokuda:Proc. ICSMA-10, ed. H. Oikawa, K. Maryuama, S. Takeuchi and M. Yamaguchi, The Japan Institute of Metals, Sendai, Japan, 1994, pp. 319–25.
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PETR SITTNER, Research Associate, formerly with the Faculty of Engineering, Mie University
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Sittner, P., Hara, Y. & Tokuda, M. Experimental study on the thermoelastic martensitic transformation in shape memory alloy polycrystal induced by combined external forces. Metall Mater Trans A 26, 2923–2935 (1995). https://doi.org/10.1007/BF02669649
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DOI: https://doi.org/10.1007/BF02669649