ESTONIAN ACADEMY
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eesti teaduste
akadeemia kirjastus
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Proceedings of the Estonian Academy of Sciences. Physics. Mathematics

Propagation of an austenite–martensite interface in a thermal gradient; 218–225

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Authors
Hanuš Seiner, Michael Landa, Petr Sedlák

Abstract

The mechanism of thermally driven shape recovery from a single variant of 2H-martensite to the parent austenitic phase is experimentally studied on a specimen of Cu–Al–Ni shape memory alloy (SMA). The formation and motion of the martensite-to-austenite transient interfaces is controlled by a thermal gradient, and recorded by a CCD camera. Independently, the moving boundaries are observed by an infrared camera to capture the temperature evolution accompanying the propagation. Both the velocity profiles of the propagation and the thermal images indicate that the shape recovery of SMAs is a complex dynamic mechanism, which cannot be described by a classical Stefan’s model of phase transitions, known from the thermal conductivity problem.


References

  1. Ball, J. M. and James, R. D. Fine phase mixtures as minimizers of energy. Arch. Ration. Mech. Analysis, 1987, 100, 13–52.

 doi:10.1007/BF00281246

  2. Maugin, G. A. Nonlinear Waves in Elastic Crystals. Oxford University Press, Oxford, 1999.

  3. Abeyaratne, R. and Knowles, J. K. Dynamics of propagating phase boundaries: thermoelastic solids with heat conduction. Arch. Ration. Mech. Analysis, 1994, 126, 203–230.

doi:10.1007/BF00375642

  4. Berezovski, A. and Maugin, G. A. On thermodynamic conditions at moving phase-transition fronts in thermoelastic solids. J. Non-Equilib. Thermodyn., 2004, 29, 37–51.

doi:10.1515/JNETDY.2004.004

  5. Escobar, J. C. and Clifton, R. J. Pressure-shear impact-induced phase transitions in Cu-14.4Al-4.19Ni single crystals. SPIE, 1995, 2427, 186–197.

doi:10.1117/12.200917

  6. Pelegrina, A. J. and Ahlers, M. The stability of the martensitic phases in Cu-Zn-Al at an electron concentration of 1.534. Acta Metall. Mater., 1990, 38, 293–299.

doi:10.1016/0956-7151(90)90059-P

  7. Salzbrenner, R. J. and Cohen, M. On the thermodynamics of thermoelastic martensitic transformations. Acta Metall., 1979, 27, 739–748.

doi:10.1016/0001-6160(79)90107-X

  8. Bhattacharya, K. Microstructure of Martensite. Oxford University Press, Oxford, 2003.

  9. Ball, J. M. Mathematical models of martensitic microstructure. Mater. Sci. Eng. A, 2004, 378, 61–69.

doi:10.1016/j.msea.2003.11.055

10. Ball, J. M. and Carstensen, C. Nonclassical austenite-martensite interfaces. J. Phys. IV (France), 1997, 7(C5), 35–40.

11. Javierre, E., Vuik, C., Vermolen, F. J. and van der Zwaag, S. A comparison of numerical models for one-dimensional Stefan problems. J. Comput. Appl. Math., 2006, 192, 445–459.

doi:10.1016/j.cam.2005.04.062

12. Shield, T. W. Orientation dependence of the pseudoelastic behavior of single crystals of Cu-Al-Ni in tension. J. Mech. Phys. Solids, 1995, 43, 869–895.

doi:10.1016/0022-5096(95)00011-7

13. Hane, K. Microstructures in Thermoelastic Martensites. PhD Thesis, University of Minnesota, 1998.


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