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J. Phys. IV France
Volume 05, Numéro C2, Février 1995
IIIrd European Symposium on Martensitic Transformations
Page(s) C2-211 - C2-216
IIIrd European Symposium on Martensitic Transformations

J. Phys. IV France 05 (1995) C2-211-C2-216

DOI: 10.1051/jp4:1995233

The Effect of Dislocation Substructure and Decomposition on the Course of Diffusionless Transformations

D. Treppmann and E. Hornbogen

Ruhr-Universität Bochum, Institut für Werkstoffe, 44780 Bochum, Germany

The mechanical properties (yield strength, hardness, transformation stresses) and the transformation temperatures of SMA can be affected by the combination of different solid-state reactions. In this context the combination of local change in chemical composition by precipitation processes and the rearrangement of defects by recovery and recrystallization are of special interest. The influence of different heat treatments on Ni-rich β-NiTi-alloys was investigated by polarization light microscopy, TEM, DSC-measurements and microhardness tests above Md. Of particular interest were the occurance and interactions due to the different nature of martensitic (M-) phase and R-phase transformation.

© EDP Sciences 1995