The shape memory behavior of -oriented Ni51Ti49 (at.%) single crystals was investigated after stressassisted aging at 500 °C for 1.5 h under a compressive stress of -150 MPa. It was found that a single family of Ni4Ti3 precipitates with two crystallographically equivalent variants was formed after aging under compressive stress. Stressassisted aging resulted in tensile two-way shape memory effect strain of 1.56% under -5 MPa. Thermal cycling under -600 MPa resulted in a transformation strain of -2.15%, while the subsequent thermal cycling under -5 MPa resulted in a tensile two-way shape memory effect strain of 2.2%.
|Number of pages||5|
|Journal||Acta Metallurgica Sinica (English Letters)|
|State||Published - Mar 2016|
Bibliographical noteFunding Information:
This work was supported in part by the NASA Fundamental Aeronautics Program, Supersonics Project and the NASA EPSCOR program (Grant No. NNX11AQ31A), and RFBR Project (Grant No. 10-03-0154-a). .
© 2016 The Chinese Society for Metals and Springer-Verlag Berlin Heidelberg.
- Aging treatment
- Phase transformations
- Shape memory alloy (SMA)
- Two-way shape memory effect
ASJC Scopus subject areas
- Metals and Alloys
- Industrial and Manufacturing Engineering