Shape memory behavior of highly Ni-rich Ni54Ti46 alloys was studied after aging (550°C, 3h, furnace cooling). A sequence of phase transformations was observed and the shape memory behavior is found to be highly stress dependent. After aging, a transformation strain of 1% with low temperature hysteresis is observed under an ultra high stress level of 1500MPa in compression. Moreover, superelastic response with 3% total strain can be obtained even when high stress level of 1500MPa is applied.
|Number of pages||5|
|Journal||Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing|
|Publication status||Published - 2013 Sept 5|
- High strength
- Mechanical characterization
- R-phase transformation
- Shape memory alloys