The Portevin–Le Chatelier (PLC) effect is a phenomenon observed in certain metallic alloys, particularly those that exhibit plastic deformation under applied stress. It is characterized by the occurrence of unstable plastic flow, leading to localized regions of deformation that can produce visible serrations or jerky flow in the stress-strain curve during tensile testing. The PLC effect is typically seen at specific temperature and strain rate conditions, often occurring in solid-solution-strengthened alloys.
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