Shape memory effect of the Ni-Ti-Hf high temperature shape memory alloy
Technical Report
·
OSTI ID:253905
The one-way shape memory effect of the newly-developed TiNi-Hf high temperature shape memory alloys has been investigated. The results of the study show that TiNi-Hf high temperature alloys possess a relatively high shape memory effect. All the alloys, even those with an Hf content as high as 30at%, exhibit complete strain recovery behavior. However, as the Hf content increases, the fully reversible strain of the alloys decreases. The increase of the second phase as the Hf content increases is the primary reason for the deterioration of the shape memory effect and ductility. The shape memory properties also deteriorate as the deformation temperature increases.
- Research Organization:
- Florida International Univ., Miami, FL (United States)
- OSTI ID:
- 253905
- Report Number(s):
- AD-A--303924/5/XAB; CNN: Contract DAAL03-91-G-0245
- Country of Publication:
- United States
- Language:
- English
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