| Autor: |
RIOS-JARA, D., PLANES, A., MAÑOSA, Ll., ORTIN, J., BELKAHLA, S., MORIN, M., GUÉNIN, G., MACQUERON, J. L., RIOS-JARA, D., PLANES, A., MAÑOSA, Ll., ORTIN, J., BELKAHLA, S., MORIN, M., GUÉNIN, G., MACQUERON, J. L. |
| Zdroj: |
Journal de Physique IV - Proceedings; October 1991, Vol. 1 Issue: 1 pC4-283-C5-288, 2835285p |
| Abstrakt: |
Measurements of the enthalpy ([MATH]H) and entropy ([MATH]S) changes associated with the martensitic transformation of Cu-Al-Be single crystals of different compositions, were performed by differential scanning calorimetry. In addition, the elastic constants of the body-centered-cubic parent phase single crystals were measured as a function of temperature, using the ultrasonic pulse-echo frequency varying - phase detection method, and the value of the elastic anisotropy (A = C44/C') was computed at the martensitic transformation temperature. The results are in good agreement with a theoretical expression obtained according to models previously proposed, which relates [MATH]S to the elastic anisotropy of the parent phase at the martensitic transformation temperature. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
|
