shape-memory-alloy

1. www.SeminarsTopics.com
Seminar
On
Shape Memory Alloys

2. SHAPE MEMORY ALLOYS

3. CONTENT
 Background
 Atomic Structure
 Objectives
 Training SMAs
 Polishing
 Conclusion
 References

4. BACKGROUND
 First record of shape memory transformation was found
in 1932(AuCd)
 Shape memory effect was discovered in Nickel-Titanium
at the Naval Ordnance Laboratory(NiTiNOL)
 Super elasticity

5. ATOMIC STRUCTURE
Austenite Martensite

6. OBJECTIVES
 Experiment with NiTiNOL wire to observe it’s
behavior
 Learn how to train NiTiNOL wire
 Measure properties and examine microstructure
 Design and build devices using NiTiNOL

7. TRAINING SMAS
 Designed and shaped our NiTiNOL wire
 500° C for 15 min
 Quenched in water immediately

8. POLISHING
Polish the NiTinol
Etched our
samples
Observed under
two different
Microscopes
Experimented with
NiTinol springs,
rods, and tubes
Used all of the
preparation to
build a device.

9. SMAS REVOLUTIONIZED LIFE
Bone Anchors
Robotic
arms
Medical Stents

10. MICROSTRUCTURES

11. ARRANGEMENT MAXIMIZES THE WORK OF
THE SMA
Compare Contrast
All NiTiNOL wire Different arrangements
Same length LW on top wire
Same amount of heat applied and
same shrinkage
Right angle- medium work
Same diameter MW on bottom wire.

12. WHY NITINOL?
 Nickel Titanium Naval Ordnance Laboratory
 Nontoxic
 Shape Memory
 Strength
 Made of inexpensive raw materials

14. CONCLUSION
 Trained wires
 Observed microstructures
 Built various devices

15. REFERENCES
 www.google.com
 www.wikipedia.com
 www.SeminarsTopics.com

16. THANKS