J. Phys. IV France
Volume 112, October 2003
Page(s) 475 - 478

J. Phys. IV France
112 (2003) 475
DOI: 10.1051/jp4:2003928

Mobility of quenched-in defects, non-linear anelasticity and stabilisation of martensite in copper-based alloys

S. Kustov1, S. Golyandin1, K. Sapozhnikov1, E. Cesari2 and J. van Humbeeck3

1  A.F. loffe Physico-Technical lnstitute, Politekhnicheskaya 26, 194021 St. Petersburg, Russia
2  Department of Physics, University of Balearic Islands, Ctra. Valldemossa km 7.5, 07071 Palma de Mallorca, Spain
3  Department MTM, KU Leuven, De Croylaan 2, 3001 Heverlee, Belgium

Non-linear anelasticity of several Cu-based $\beta_1\,'$ martensitic alloys, exhibiting different stabilization properties, has been studied over wide temperature (8 to 300 K) and strain amplitude (2*10 -7 to 2*10 -4) ranges. Temperature ranges of quenched-in defect mobility were found to be similar for stabilizing Cu-Zn-A1 and for Cu-A1-Ni alloy, which is not prone to the stabilization, but different for two stabilizing alloys (Cu-A1-Be and Cu-Zn-A1). On the other hand, the interaction modes of quenched-in defects with linear/planar lattice defects differ significantly for Cu-A1-Ni and Cu-Zn-A1 alloys.

© EDP Sciences 2003