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www.thetoppersway.com Submitted To: Submitted By: www.thetoppersway.com Seminar On Shape Memory Alloys
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SHAPE MEMORY ALLOYS
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C ONTENT Background Atomic Structure Objectives Training SMAs Polishing Conclusion References
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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
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A TOMIC S TRUCTURE AusteniteMartensite
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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
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T RAINING SMA S Designed and shaped our NiTiNOL wire 500° C for 15 min Quenched in water immediately
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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.
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SMA S REVOLUTIONIZED LIFE Bone Anchors Robotic arms Medical Stents
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M ICROSTRUCTURES
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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.
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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
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C ONCLUSION Trained wires Observed microstructures Built various devices
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R EFERENCES www.google.com www.wikipedia.com www.thetoppersway.com www.pptplanet.com
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T HANKS
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