Abstract
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.
Original language | English |
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Pages (from-to) | 66-70 |
Number of pages | 5 |
Journal | Materials Science and Engineering: A |
Volume | 580 |
DOIs | |
State | Published - Sep 5 2013 |
Keywords
- High strength
- Mechanical characterization
- NiTi
- R-phase transformation
- Shape memory alloys
ASJC Scopus subject areas
- General Materials Science
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering