SMART MATERIALS S HAPE M EMORY A LLOYS AN EDUCATIONAL EXPERIENCE.

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Presentation transcript:

SMART MATERIALS S HAPE M EMORY A LLOYS AN EDUCATIONAL EXPERIENCE

SCIENTIFIC BACKGROUND 1932 A. Ölander discovered the pseudoelastic behavior of the Au-Cd alloy Greninger & Mooradian observed phase changes by decreasing and increasing the temperature of a Cu-Zn alloy The U.S. Naval Ordnance Laboratory discovered a new material that exhibited shape memory effect. This alloy was named NiTiNOL N ickel T itanium N aval O rdnance L aboratory

SCIENTIFIC BACKGROUND

SETTING “ORIGINAL” SHAPE

ACTUATION: MUSCLE WIRE Nitinol Wire Stretched at room temp. Small current returns wire to original length Up to 8% stretch

APPLICATIONS Railway Signal

APPLICATIONS Robotic Hand

ADDITIONAL APPLICATIONS

S.M.A. Q UESTIONS ?

REFERENCES Shape Memory Alloys (SMA) Martensitic Nanostructure and Recent Applications Development A. Coda SAES Getters S.p.A., Lainate (MI), Italy Shape Memory Alloy National Nanotechnology Secondary School Resource, etals/applications_for_shape_memory_al.htm content