International Seminar on Mechanics and Mechanisms of Solid-Solid Phase Transformations
J. Phys. IV France 06 (1996) C1-357-C1-366
On Transformation Pathways of General Stress Controlled Thermoelastic Martensitic Transformation in Shape Memory AlloysP. Sittner1, M. Takakura2, Y. Hara2 and M. Tokuda2
1 Institute of Physics, Czech Academy of Sciences, Prague, Czech Republic
2 Faculty of Engineering, Mie University, Tsu, Japan
The progress of thermoelastic martensitic transformation/MT/ in Cu-Al-Zn-Mn shape memory alloy/SMA/ polycrystals subjected to nonproportional thermomechanical loadings was investigated by combined tension and torsion of tubular specimens (T>>Af). The strain response of SMA polycrystal to various thermomechanical loadings along prescribed stress-temperature paths was examined. It has been shown that the SMA polycrystal can be loaded - unloaded repeatedly by the change of temperature and general combination of external forces of axial load and torque with relatively well defined, path dépendent but well reproducible strain path response.
© EDP Sciences 1996