| Numéro |
J. Phys. Colloques
Volume 43, Numéro C4, Décembre 1982
ICOMAT-82International Conference on Martensitic Transformations |
|
|---|---|---|
| Page(s) | C4-341 - C4-343 | |
| DOI | https://doi.org/10.1051/jphyscol:1982448 | |
ICOMAT-82
International Conference on Martensitic Transformations
J. Phys. Colloques 43 (1982) C4-341-C4-343
DOI: 10.1051/jphyscol:1982448
1 VACUUMSCHMELZE GmbH, D-6450 Hanau 1 , F.R.G.
2 Institut Dr. R. Straumann AG, Waldenburg, Switzerland
International Conference on Martensitic Transformations
J. Phys. Colloques 43 (1982) C4-341-C4-343
DOI: 10.1051/jphyscol:1982448
MARTENSITIC TRANSFORMATION IN AN EQUIATOMIC NiMn ALLOY
G. Hausch1, E. Török2 et H . Warlimont11 VACUUMSCHMELZE GmbH, D-6450 Hanau 1 , F.R.G.
2 Institut Dr. R. Straumann AG, Waldenburg, Switzerland
Abstract
The intermetallic compound NiMn undergoes a series of transformations from the high temperature f.c.c γ-phase, via an intermediate β-phase with CsCl type structure to a low temperature tetragonal θ phase with CuAuI type structure. The martensitic transformation β-θ in NiMn is associated with characteristic elastic properties : the β phase has a low absolute value of Young's moduls and the θ phase has an extremely high (negative) temperature coefficient (dE/dt) ; both characteristic indicate lattice instability favouring a martensitic transformation β - θ.