Shape Memory Alloys Nickel Titanium

1
Shape Memory AlloysNickel Titanium

• By
• Richard Cordero II

2
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

3
Nickel Titanium

• Discovered at Naval Ordnance Laboratory
• Most common type of shape memory alloy
• Two solid phases
• Martensite phase
• Austensite phase

4
Current Applications

• Medical
• Tweezers
• Orthodontic wire
• Eye glass frames
• Safety
• Anti-scalding devices
• fire-sprinklers

• Miscellaneous
• Appliances
• Clothing
• Structures
• Micromanipulators
• Robotic actuators

5
Future Applications

• Engines in cars and airplanes
• Car frames
• Engine cooling
• Carburetor
• Engine lubrication controls

6
References

• Shape Memory Alloys Lin, Richard
  http//www.stanford.edu/richlin1/sma/sma.htmlAPP
  LICATIONS
• Johnson Matthey http//www.sma-inc.com/html/nitin
  ol_components.html
• Nickel Titanium Shape Memory Alloys
  http//www.azom.com/details.asp?ArticleID1365
• Memory Metal http//jchemed.chem.wisc.edu/JCESoft
  /CCA/CCA2/MAIN/MEMORYM/CD2R1.HTM
• Shape Memory Alloys http//www.designinsite.dk/ht
  msider/m1310.htm