Note: Heat Setting A Shape Memory Alloy
Objective:
Heat a steel die to 975 °F (523.8 ÂşC) to set (cure) a shape memory alloy in the correct position.
End Product:
Shape memory alloy
Equipment:
Ambrell 3kW induction heating system equipped with a remote workhead containing one 1.0 ÂľF capacitor
An induction heating coil designed and developed specifically for this application.
Materials:
Nitinol wire
2 in (50.8 mm) diameter tapered steel die
steel tube to house the die
instant adhesive
Temperature:
975 °F(523.8 ÂşC)
Frequency:
131 kHz
Testing:
A five-turn helical coil is used to heat the steel die. The Nitinol wire is set into the die and tacked into place using instant adhesive. The die is placed inside a larger steel tube. The die cure is heated to 945 ÂşF (507.2 ÂşC) in 75 seconds. Successful heat setting of the Nitinol wire is achieved in 15 seconds
Benefits:
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Fast, accurate, repeatable heating
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Heat precisely delivered only to where it is needed
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