Scaling Behavior of Portevin-Le Chatelier Effect

Details Scaling Behavior of Portevin-Le Chatelier Effect Scaling Behavior of Portevin-Le Chatelier Effect

2006-02-18

arxiv.org/abs/cond-mat/0602436v1

Physics

Condensed Matter

Materials Science

To appear in the Proceedings of Science, Presented at the conference SMPRI, IISc Bangalore. To appear in the Proceedings of Sc

Scientific paper

The scaling behavior of the Portevin-Le Chatelier (PLC) effect is studied by deforming a substitutional alloy, Al-2.5%Mg and an interstitial alloy, low carbon steel (0.15%C, 0.33%Mn, 0.04%P, 0.05%S, 0.15%Si and rest Iron) at room temperature for a wide range of strain rates. To reveal the exact scaling nature, the time series data of true stress vs. time, obtained during the tensile deformation (corrected for drift due to strain hardening by polynomial fitting method), are analyzed by two complementary methods: the standard deviation analysis and the diffusion entropy analysis. From these analyses we could establish that in the entire span of strain rates, PLC effect showed Levy walk type of scaling property.

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