| Issue |
J. Phys. IV France
Volume 112, October 2003
|
|
|---|---|---|
| Page(s) | 1111 - 1114 | |
| DOI | https://doi.org/10.1051/jp4:20031077 | |
J. Phys. IV France 112 (2003) 1111
DOI: 10.1051/jp4:20031077
Pseudotwinning in indium-lead concentrated alloys
L.S. Fomenko, S.V. Lubenets and V.D. NatsikVerkin Institute for Low Temperature Physics and Engineering, National Academy of Sciences of Ukraine, 47 Lenin Ave., Kharkov 61103, Ukraine
Abstract
Pseudoelasticity caused by pseudotwinning in short-range ordered In-Pb alloys (6,
8 and 11.6 at.% Pb) is studied in the temperature range 1,7-180 K. The mechanical hysteresis
parameters, namely, the thermodynamic stress
which provides the reversibility
of plastic deformation and the friction stress
which characterizes the resistance
offered by crystal lattice and its defects to twin boundaries motion are estimated. It is found that
athermal processes determine the reversible deformation: the mechanical parameters
N
do not depend on temperature and strain rate.
The stress
increases and the stress
decreases with increasing Pb content.
One of the main conditions of the exhibition of superelasticity is the fulfillment of the inequality
.
© EDP Sciences 2003