Ananthakrishna, G and Brechet, Y and Fressengeas, C and Kubin, LP and Lebyodkin, M (2000) Crossover in the dynamics of jerky flow in Al-Mg polycrystals. In: Zeitschrift fur Angewandte Mathematik und Mechanik, 80 (2). pp. 415-416.
Full text not available from this repository. (Request a copy)Abstract
Jerky flow in Al-Mg alloys is investigated through the statistics of the stress drops size, and through a dynamic analysis of the stress vs. time records. At low applied strain rate levels, the peaked distribution is associated with chaotic dynamics, while at higher strain rates, the unstable behavior is characterized by power law distributions reminiscent of critical dynamics. In addition, the bands of localized plastic deformation shift from stationary to propagating. This crossover is discussed in terms of a nonideal model of jerky flow, with a range of negative strain rate sensitivity and spatial interactions of varying strength
| Item Type: | Journal Article |
|---|---|
| Publication: | Zeitschrift fur Angewandte Mathematik und Mechanik |
| Publisher: | Wiley-VCH |
| Additional Information: | Copyright of this article belongs to Wiley-VCH |
| Keywords: | aluminium alloys;chaos;magnesium alloys;plastic flow;Portevin Le Chatelier effect;stress strain relations |
| Department/Centre: | Division of Chemical Sciences > Materials Research Centre |
| Date Deposited: | 26 Jul 2007 |
| Last Modified: | 27 Aug 2008 12:43 |
| URI: | http://eprints.iisc.ac.in/id/eprint/10320 |
Actions (login required)
 |
View Item |
