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Memory alloy engine demonstrationMemory alloy engine demonstration
Some materials, plastic deformation occurs, after a suitable thermal process can be restored to the shape before deformation, a phenomenon called shape memory effect (SME). Alloy engine demonstrator is the use of such a shape memory alloy memory effect, in the case of heating, alloy ring because you want to restore the original state line, it will generate a pulling force (and alloy ring acts as a belt function), and this force flywheel , so that the flywheel.
The shape memory alloy treated with a particular transition temperature, at this conversion temperature, the alloy wire can be bent into any shape, showing plasticity. Once the alloy wire temperature exceeds the transition temperature, it will try to restore the shape processing, showing flexibility. The lower part of the device when the small pulley alloy immersed in hot water about 70 °C, hot water trying to straighten alloy, because the whole circle alloy wire stretched on the size of the pulley, so that small pieces soaked in hot water straight on to alloy generating a tension, the tension that small pulley rotated a certain angle. This rotation in turn driven by a short cold alloy wire into the adjacent hot water...
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