| Numéro |
J. Phys. Colloques
Volume 42, Numéro C5, Octobre 1981
ICIFUAS-7Seventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids |
|
|---|---|---|
| Page(s) | C5-995 - C5-1000 | |
| DOI | https://doi.org/10.1051/jphyscol:19815153 | |
ICIFUAS-7
Seventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids
J. Phys. Colloques 42 (1981) C5-995-C5-1000
DOI: 10.1051/jphyscol:19815153
1 Institut de Génie Atomique, Swiss Federal Institute of Technology, Ecublens CH-1015 Lausanne, Switzerland
2 Brown Boveri Research Center, CH-5401 Baden, Switzerland
Seventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids
J. Phys. Colloques 42 (1981) C5-995-C5-1000
DOI: 10.1051/jphyscol:19815153
RELATION BETWEEN THE DAMPING SPECTRUM AND THE DISLOCATION MOTION IN MARTENSITIC ALLOYS
R. Gotthardt1 et O. Mercier21 Institut de Génie Atomique, Swiss Federal Institute of Technology, Ecublens CH-1015 Lausanne, Switzerland
2 Brown Boveri Research Center, CH-5401 Baden, Switzerland
Abstract
Internal friction spectra measured on martensitic alloys all exhibit a common feature : the internal friction is high in the martensitic phase and low or very low at high temperatures, when the material has a β structure. Transmission electron microscopy observations revealed a high density of new interface dislocations in the martensite. A qualitative model is proposed which explains the high damping of the martensite by the movement of these dislocations.