| Numéro |
J. Phys. Colloques
Volume 46, Numéro C10, Décembre 1985
Eighth International Conference on Internal Friction and Ultrasonic Attenuation in Solids
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|---|---|---|
| Page(s) | C10-645 - C10-648 | |
| DOI | https://doi.org/10.1051/jphyscol:198510142 | |
Eighth International Conference on Internal Friction and Ultrasonic Attenuation in Solids
J. Phys. Colloques 46 (1985) C10-645-C10-648
DOI: 10.1051/jphyscol:198510142
1 Department of Materials Science, Faculty of Engineering, University of Tokyo, Bunkyo-ku, Tokyo, Japan
2 Engineering Research Institute, Faculty of Engineering, University of Tokyo, Japan
3 Shibaura Institute of Technology, Minato-ku, Tokyo, Japan
J. Phys. Colloques 46 (1985) C10-645-C10-648
DOI: 10.1051/jphyscol:198510142
EFFECTS OF AGEING ON DAMPING CAPACITY OF TiNi ALLOYS
K. ITO1, T. MOROYAMA2 and I. FUKUMOTO31 Department of Materials Science, Faculty of Engineering, University of Tokyo, Bunkyo-ku, Tokyo, Japan
2 Engineering Research Institute, Faculty of Engineering, University of Tokyo, Japan
3 Shibaura Institute of Technology, Minato-ku, Tokyo, Japan
Abstract
Young's modulus(E) and damping capacity(SDC) of binary TiNi alloys have been measured between 150K and 375K by a flexural vibration method with a frequency of about 260Hz and strain amplitude of 1x10-5. Ageing of higher Ni alloys at lower temperatures increases transformation temperatures of the quenched state and yields another critical point at a higher temperature where E decreases and SDC increases sharply, while changes in both E and SDC of lower Ni alloys aged at higher temperatures are small. Ageing process is discussed from these effects of ageing on the temperature spectra of E and SDC which are classified in detail into seven cases.