smart materials s hape m emory a lloys an educational experience

SMART MATERIALS

SHAPEMEMORYALLOYSAN EDUCATIONAL EXPERIENCE

SCIENTIFIC BACKGROUND

1932 A. Ölander discovered the pseudoelastic behavior of the Au-Cd alloy.

1938 Greninger & Mooradian observed phase changes by decreasing and increasing the temperature of a Cu-Zn alloy.

1960 The U.S. Naval Ordnance Laboratory discovered a new material that exhibited shape memory effect.

This alloy was named NiTiNOL Nickel Titanium Naval Ordnance Laboratory

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

APPLICATIONSRailway Signal

APPLICATIONS

Robotic Hand

ADDITIONAL APPLICATIONS

S.M.A.QUESTIONS?

REFERENCEShttp://www.technologystudent.com/equip1/sma1.htm

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, www.AccessNano.org

http://depts.washington.edu/matseed/mse_resources/Webpage/Memory%20metals/applications_for_shape_memory_al.htm

http://robertcampbelluas.edublogs.org/shape-memory-metals/

http://en.wikipedia.org/wiki/Inferior_vena_cava_filter

http://www.autosplice.com/Product/?id=10043#2-content=2-toggle~~visible-content

http://www.furukawa-ftm.com/english/nt-e/appli/index.htm