Evolution of the Entropy of Dislocation Structures with Strain in Solid Solutions of Cu-0.5at.% Al

Abstract:

The study on the evolution of the dislocation structure (DS) parameters with strain of solid solutions of Cu-0.5 at.% Al at different test temperatures has been carried out. It has been shown that in substructures with a disordered type of DS (disorder), the disordered mixtures with non-disoriented cells, as well as mixtures of non-disoriented and disoriented cellular structures, the entropy density increases with strain. It has been shown that formation of the cellular substructure corresponds to a diffuse kinetic phase transition of the 1-st kind in the DS. A jump-like decrease in entropy accompanying this phase transition is associated with the annihilation of dislocations in cellular walls and formation of excess dislocation density.

• Periodical: Key Engineering Materials (Volume 683)
• Pages: 232-236
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.683.232
• Online since: February 2016
• Authors: Yurii A. Abzaev, Lyudmila Trishkina, Svetlana Porobova, Аnatoliy A. Klopotov*, Viktor A. Vlasov, Vladimir Klopotov
• Keywords: Dislocation Structure, Dislocation Transformations, Shannon Entropy, Solid Solutions of Cu-Al Alloys, Statistical Boltzmann Entropy, Strain

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DOI: 10.1080/01418619308225366