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Shape Memory Effect
The Basics
Shape Memory Effect
The Basics
The shape memory effect makes use of martensitic transformations
to
display remarkable properties.
The metal is formed to a desired ;parent' shape and then heat treated,
this fixes the parent shape into the metals 'memory'.
display remarkable properties.
The metal is formed to a desired ;parent' shape and then heat treated,
this fixes the parent shape into the metals 'memory'.
Heat treatments vary depending on the exact alloy and its
intended use but
for an equi-atomic NiTi alloy a typical treatment would be heating to 500°C
for 5 minutes then cooling at room temperature.
for an equi-atomic NiTi alloy a typical treatment would be heating to 500°C
for 5 minutes then cooling at room temperature.
°C
mins
mins
Screws are used to hold the coil in place. It is vital
that the metal cannot move while being heat treated otherwise the required
shape will not be set.
(Click and drag the spring to deform it)
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