| Issue |
J. Phys. Colloques
Volume 43, Number C4, Décembre 1982
ICOMAT-82International Conference on Martensitic Transformations |
|
|---|---|---|
| Page(s) | C4-127 - C4-132 | |
| DOI | https://doi.org/10.1051/jphyscol:1982412 | |
ICOMAT-82
International Conference on Martensitic Transformations
J. Phys. Colloques 43 (1982) C4-127-C4-132
DOI: 10.1051/jphyscol:1982412
1 Istituto di Ingegneria Nucleare, CESNEF, Politecnico di Milano, via Ponzio 34/3, 20133 Milano, Italy
2 Gruppo Nazionale di Struttura della Materia, GNSM, del Consiglio Nazionale delle Ricerche, UR7, Italy
International Conference on Martensitic Transformations
J. Phys. Colloques 43 (1982) C4-127-C4-132
DOI: 10.1051/jphyscol:1982412
PHASE STABILITY AND MARTENSITIC TRANSFORMATION ONSET IN TRANSITION METAL AND NOBLE METAL ß -PHASE ALLOYS
P.M. Ossi1 et F. Rossitto1, 21 Istituto di Ingegneria Nucleare, CESNEF, Politecnico di Milano, via Ponzio 34/3, 20133 Milano, Italy
2 Gruppo Nazionale di Struttura della Materia, GNSM, del Consiglio Nazionale delle Ricerche, UR7, Italy
Abstract
A unified approach, able to take into account the martensitic phase transition onset in transition metal and noble metal ß-phase alloys exhibiting shape-memory effect, is presented. The central concept of the interpretative model is the variation of a phenomenological parameter, the "Valence Electrons Localization Degree" (VELD), correlated with the changes of the electron density of states near the Fermi energy. The effects of the composition variation of the alloy allow for qualifying the substituent elements as electron donors or acceptors. Such a behaviour is tested by examining the transition temperature trends. The results are in very good agreement with the available experimental data.