| Numéro |
J. Phys. Colloques
Volume 43, Numéro C4, Décembre 1982
ICOMAT-82International Conference on Martensitic Transformations |
|
|---|---|---|
| Page(s) | C4-797 - C4-802 | |
| DOI | https://doi.org/10.1051/jphyscol:19824130 | |
International Conference on Martensitic Transformations
J. Phys. Colloques 43 (1982) C4-797-C4-802
DOI: 10.1051/jphyscol:19824130
SHAPE MEMORY EFFECT AND MECHANICAL BEHAVIOUR OF AN Fe-30Mn-1Si ALLOY SINGLE CRYSTAL
A. Sato1, K. Soma2, E. Chishima1 et T. Mori11 Department of Materials Science and Engineering, Tokyo Institute of Technology, Nagatsuta, Midori-ku, Yokohama 227, Japan
2 Technical Center, Bridgestone Tire Co., LTD., Kodaira-shi, Tokyo 187, Japan
Abstract
The present paper deals with two main problems associated with the γ⇄ε transformation in an Fe-30Mn-1Si alloy. The first is the shape memory effect ; it has been found that an Fe-30Mn-1Si alloy single crystal exhibits a nearly complete shape memory effect caused by entirely different origin from that adopted for the usual shape memory alloys such as TiNi and Cu based alloys. The second concerns the large hardening produced by the pre-injected ε-martensites. This is in contrast to the relatively small hardening observed in an Fe-18Cr-14Ni alloy single crystal. Characteristic features of the crossing of an ε plate or slip with a pre-injected ε plate have been examined, confirming that the observed large hardening comes from the strong blocking by the pre-injected ε-plate in absence of an additional ε→α transformation.