|About this Abstract
||Materials Science & Technology 2019
||Advanced Manufacturing, Processing, Characterization and Modeling of Functional Materials
||The Influence of Thermal Cycling on the Indentation-Induced Two-way Shape Memory Effect in NiTi Alloys
||Carl Frick, Christopher Laursen, Mitchell Anderson
|On-Site Speaker (Planned)
The indentation-induced two-way shape-memory effect (TWSME) has appeal for active surface applications due to its simple training procedure and temperature dependent shape-shifting nature. However, a direct investigation into the repeatability over many cycles remain unanswered. Therefore, the explicit purpose of this study is to investigate the influence that indentation temperature and upper cycle temperature have on TWSME behavior over multiple cycles. A 50.3 at% Ni-Ti shape-memory alloy was Vickers indented to a load of 80 N at various indentation temperatures which span the material’s martensitic and austenitic phases. Samples are then thermally cycled from 15C below the martensitic finish temperature to a predetermined upper cycle temperature of either 10C or 150C above the austenitic finish temperature for up to 1000 cycles. Results suggest that the magnitude of the TWSME deformation recovery is governed by temperature much more so than by number of thermal cycles.