Abstract
The paper gives an outline of a thermodynamic theory of metal plasticity reduced to its simplest terms. The theory is based on classical thermostatics as it applies to elastic deformations and argues that a system which undergoes plastic deformation traverses a densely spaced, alternating sequence of stable and unstable unconstrained equilibrium states. These occur on a scale which is not easily observed during macroscopic experiments and are confined to a microscale of the order of the size of a crystallite. The transition from a stable state to an unstable state can be treated as a reversible process but the further transition from an unstable to a stable state occurs through an intrinsically dissipative, irreversible “jump”.
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