How long does memory last? For shape memory alloys, the longer the better
Scientists at Ames Laboratory are looking at using shape memory alloys -- think unbreakable eye-glass frames -- taking advantage of their elastocaloric effect, which is a cooling effect that happens when the alloy is cyclically acted upon by mechanical forces. Heat pumping systems designed in that way could lead to greener, more energy efficient HVAC and refrigeration systems than currently available gas compression models.