The four-step multiple stage transformation in deformed and annealed Ti49Ni51 shape memory alloy
Journal
Acta Materialia
Journal Volume
52
Journal Issue
5
Pages
1117-1122
Date Issued
2004
Author(s)
Abstract
A four-step multiple stage transformation is observed in 20% deformed and 500 °C annealed Ti49Ni51 shape memory alloy. Two extra B2→B19′ transformation peaks appear before the previously described B2 →R and R→B19′ peaks while cooling, and these correspond to one new peak, which appears after the original B19′→B2 peak during heating. These two extra peaks are caused by the combined effect of severe cold-working and long-time annealing on Ti49Ni51 alloy, and they come separately from the B2→B19′ transformation occurring in regions with low and high dislocation densities, which are originally suppressed by cold-working. © 2003 Acta Materialia Inc. Publisher by Elsevier Ltd. All rights reserved.
Type
journal article