Markov Property of Continuous Dislocation Band Propagation
arXiv:0802.2754 · doi:10.1016/j.physleta.2008.03.013
Abstract
Tensile tests were carried out by deforming polycrystalline samples of substitutional Al-2.5%Mg alloy at room temperature for a range of strain rates. The Portevin-Le Chatelier (PLC) effect was observed throughout the strain rate regime. The deformation bands in this region are found to be of type A in nature. From the analysis of the experimental stress time series data we could infer that the dynamics of type A dislocation band propagation is a Markov process.
17 pages, 8 figures, to appear in Physics Letters A