J. Phys. IV France
Volume 112, October 2003
Page(s) 479 - 482

J. Phys. IV France
112 (2003) 479
DOI: 10.1051/jp4:2003929

Fundamental aspects on the thermoelasticity and pseudoelasticity in single interface transformations

F.C. Lovey1, V. Torra2, A. Isalgué2 and A.M. Condo1

1  Centro Atomico Bariloche, Instituto Balseiro, CNEA-UNCu, 8400 Bariloche, Argentina
2  CIRG-DPA, Universitat Politecnica de Catalunya, Campus Nord B-4, 08034 Barcelona, Spain

The thermoelasticity in the $\beta$ $ \rightarrow$2H single interface transformation in a Cu-Zn-A1 alloy was studied. The coefficient of thermoelasticity was found to be much smaller than that of the $\beta$ $ \rightarrow$18R transformation. It was found that stacking faults are indeed created from the interaction of the 2H martensite with the existing dislocations. However the 2H martensite, at variance with the 18R martensite, is twinned. Consequently the stacking faults are not dragged by the moving interface, instead they end at some of the twin interfaces in each twin variant. In conclusion there is no, or little, contribution of the stacking faults to the thermoelasticity.

© EDP Sciences 2003