SMART MATERIALS
SHAPEMEMORYALLOYS
AN 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
APPLICATIONS
Railway Signal
APPLICATIONS
Robotic Hand
ADDITIONAL APPLICATIONS
S.M.A.
QUESTIONS?
REFERENCES
http://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%20m
etals/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~~visiblecontent
http://www.furukawa-ftm.com/english/nt-e/appli/index.htm