Shape Memory AlloysShape Memory AlloysNickel TitaniumNickel Titanium

ByByRichard Cordero IIRichard Cordero II

Shape Memory AlloysShape Memory AlloysMetals that remember their original Metals that remember their original shapeshape

First observed by Chang and Read in First observed by Chang and Read in 19321932

Shape memory effect observed in 1951Shape memory effect observed in 1951

NiTi discovered by William J. Buehler in NiTi discovered by William J. Buehler in 19611961

Nickel TitaniumNickel TitaniumDiscovered at Naval Discovered at Naval Ordnance LaboratoryOrdnance Laboratory

Most common type of Most common type of shape memory alloyshape memory alloy

Two solid phasesTwo solid phases Martensite phaseMartensite phase Austensite phaseAustensite phase

Current ApplicationsCurrent ApplicationsMedicalMedical TweezersTweezers Orthodontic wireOrthodontic wire Eye glass framesEye glass framesSafetySafety Anti-scalding Anti-scalding

devices devices fire-sprinklers fire-sprinklers

Miscellaneous Miscellaneous AppliancesAppliances ClothingClothing StructuresStructures MicromanipulatoMicromanipulato

rsrs Robotic Robotic

actuators actuators

Future ApplicationsFuture ApplicationsEngines in cars and airplanesEngines in cars and airplanesCar framesCar framesEngine coolingEngine coolingCarburetorCarburetorEngine lubrication controlsEngine lubrication controls

ReferencesReferencesShape Memory Alloys; Lin, Richard Shape Memory Alloys; Lin, Richard http://www.stanford.edu/~richlin1/sma/sma.html#APPLIChttp://www.stanford.edu/~richlin1/sma/sma.html#APPLICATIONSATIONS

Johnson Matthey; Johnson Matthey; http://www.sma-inc.com/html/nitinol_components.htmlhttp://www.sma-inc.com/html/nitinol_components.html

Nickel – Titanium Shape Memory Alloys; Nickel – Titanium Shape Memory Alloys; http://www.azom.com/details.asp?ArticleID=1365http://www.azom.com/details.asp?ArticleID=1365

Memory Metal; Memory Metal; http://jchemed.chem.wisc.edu/JCESoft/CCA/CCA2/MAIN/Mhttp://jchemed.chem.wisc.edu/JCESoft/CCA/CCA2/MAIN/MEMORYM/CD2R1.HTMEMORYM/CD2R1.HTM

Shape Memory Alloys; Shape Memory Alloys; http://www.designinsite.dk/htmsider/m1310.htm http://www.designinsite.dk/htmsider/m1310.htm