On the Evidence of Thermodynamic Self-Organization during Fatigue: A Review

Abstract

In this review paper, the evidence and application of thermodynamic self-organization are reviewed for metals typically with single crystals subjected to cyclic loading. The theory of self-organization in thermodynamic processes far from equilibrium is a cutting-edge theme for the development of a new generation of materials. It could be interpreted as the formation of globally coherent patterns, configurations and orderliness through local interactivities by “cascade evolution of dissipative structures”. Non-equilibrium thermodynamics, entropy, and dissipative structures connected to self-organization phenomenon (patterning, orderliness) are briefly discussed. Some example evidences are reviewed in detail to show how thermodynamics self-organization can emerge from a non-equilibrium process; fatigue. Evidences including dislocation density evolution, stored energy, temperature, and acoustic signals can be considered as the signature of self-organization. Most of the attention is given to relate an analogy between persistent slip bands (PSBs) and self-organization in metals with single crystals. Some aspects of the stability of dislocations during fatigue of single crystals are discussed using the formulation of excess entropy generation.

Information geometry and non-equilibrium thermodynamic relations in the over-damped stochastic processes

“…These results can have interesting implications for self-organization, which refers to a novel emergence of order from disorder in complex systems [64][65][66][67][68][69]. Accompanied by the appearance of a coherent structure, pattern formation, etc, self-organization implies the reduction in complexity/disorder/entropy.…”

“…In fact, the minimum entropy production was advocated for self-organizing systems (e.g. [66,68]). While most previous works considered the minimum of entropy production (or entropy) in a stationary state, or at one point in time, we recognize that self-organization is a non-equilibrium, time-varying process rather than a stationary one.…”

Analysis of Influencing Factors for Stackable and Expandable Acoustic Metamaterial with Multiple Tortuous Channels

“…According to the classical acoustic-electric analogy method [34][35][36], the total acoustic impedance Z total of the SEAM-MTCs could be derived using Equation (14), and the corresponding theoretical sound absorption coefficient α could be calculated using Equation (15).…”

Study of Adaptation Processes in Tribofilms during Friction of Antifriction Aluminum Alloys for Journal Bearings

“…This principle was used for developing wear-resistant materials for sliding electrical contacts [21], journal bearings [22], and coatings for cutting tools [23]. Thermodynamic self-organization was also described for metals during fatigue [24].…”