What is the relationship between yield point and temperature?
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Does the yield strength of materials always decrease as the temperature rises?
Not necessarily; it depends on the material.
Curie point: At a certain temperature, the material loses its magnetism. By utilizing the demagnetization characteristic at the Curie point, a magnetic switch for rice cookers is manufactured; at a temperature of 102 or 103 degrees, the magnet loses its magnetism, and under the force of the spring, the magnetic switch of the rice cooker is disconnected, thereby cutting off power to the rice cooker.