Aging effect on the low temperature internal friction relaxation peak in a Ti49Ni51 alloy
Journal
Journal of Alloys and Compounds
Journal Volume
355
Journal Issue
1-2
Pages
90-96
Date Issued
2003
Author(s)
Abstract
The internal friction relaxation peak appearing around 200 K in TiNi alloys is associated with the interaction of twin-related dislocations with the pinning agents. The 200 K relaxation peak in the 400 °C aged Ti49Ni51 alloy appears at the R-phase and martensite but not at the B2 phase, since there is no twin-dislocation available in the latter. The sources of the pinning agents are due to the quenched-in vacancies or Ti11Ni14 precipitate-vacated lattice sites in the matrix. It is found that 400 °C aging will significantly affect the relaxation characteristic in Ti49Ni51 alloy. These aging effects on the 200 K relaxation peak in Ti49Ni51 alloy will be systematically investigated in this study. © 2003 Elsevier Science B.V. All rights reserved.
Type
journal article