| Numéro |
J. Phys. Colloques
Volume 43, Numéro C4, Décembre 1982
ICOMAT-82International Conference on Martensitic Transformations |
|
|---|---|---|
| Page(s) | C4-173 - C4-178 | |
| DOI | https://doi.org/10.1051/jphyscol:1982420 | |
ICOMAT-82
International Conference on Martensitic Transformations
J. Phys. Colloques 43 (1982) C4-173-C4-178
DOI: 10.1051/jphyscol:1982420
MIT, Cambridge, MA, U.S.A.
International Conference on Martensitic Transformations
J. Phys. Colloques 43 (1982) C4-173-C4-178
DOI: 10.1051/jphyscol:1982420
KINETICS OF MARTENSITIC INTERFACE MOTION
M. Grujicic, G.B. Olson et W.S. OwenMIT, Cambridge, MA, U.S.A.
Abstract
The mobility of ß-γ[MATH] martensitic interfaces in thermoelastic ß-CuAlNi alloys is investigated using stress-assisted single interface transformations over a temperature range of 180 to 410K and imposed interfacial velocities of 10-6 to 10-2 m/s. The behavior is consistent with thermally-activated interfacial motion, although an anomalous temperature dependence is observed below 210K which may be due to elastic softening. Measured activation energies of 0.3 to 0.4 eV (4.5 x 10-20 to 6.5 x 10-20 J) and activation volumes of 103 to 104 atomic volumes suggest that motion of the interface above 210K is controlled by interaction with discrete particles or clusters.