1. www.thetoppersway.com Submitted To: Submitted By: www.thetoppersway.com Seminar On Shape Memory Alloys

2. SHAPE MEMORY ALLOYS

3. C ONTENT Background Atomic Structure Objectives Training SMAs Polishing Conclusion References

4. B ACKGROUND 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. A TOMIC S TRUCTURE AusteniteMartensite

6. O BJECTIVES 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. T RAINING SMA S Designed and shaped our NiTiNOL wire 500° C for 15 min Quenched in water immediately

8. P OLISHING 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. SMA S REVOLUTIONIZED LIFE Bone Anchors Robotic arms Medical Stents

10. M ICROSTRUCTURES

11. A RRANGEMENT M AXIMIZES THE W ORK OF THE SMA CompareContrast All NiTiNOL wireDifferent arrangements Same lengthLW on top wire Same amount of heat applied and same shrinkage Right angle- medium work Same diameterMW on bottom wire.

12. W HY N I T I NOL? N ickel T itanium N aval O rdnance L aboratory Nontoxic Shape Memory Strength Made of inexpensive raw materials

14. C ONCLUSION Trained wires Observed microstructures Built various devices

15. R EFERENCES www.google.com www.wikipedia.com www.thetoppersway.com www.pptplanet.com

16. T HANKS