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Shape Memory Alloys Nickel Titanium. Shape Memory Alloys. Metals that remember their original shape First observed by Chang and Read in 1932 Shape memory effect observed in 1951 NiTi discovered by William J. Buehler in 1961. Nickel Titanium. Discovered at Naval Ordnance Laboratory
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Shape Memory Alloys • Metals that remember their original shape • First observed by Chang and Read in 1932 • Shape memory effect observed in 1951 • NiTi discovered by William J. Buehler in 1961
Nickel Titanium • Discovered at Naval Ordnance Laboratory • Most common type of shape memory alloy • Two solid phases • Martensite phase • Austensite phase
Medical Tweezers Orthodontic wire Eye glass frames Safety Anti-scalding devices fire-sprinklers Miscellaneous Appliances Clothing Structures Micromanipulators Robotic actuators Current Applications
Future Applications • Engines in cars and airplanes • Car frames • Engine cooling • Carburetor • Engine lubrication controls