|About this Abstract
||2012 TMS Annual Meeting & Exhibition
||Magnesium Technology 2012
||K-7: Ductility Improvement in Equal Channel Angular Processed AZ31 Magnesium Alloy
||Sonia Modarres-Razavi, David C. Foley, Ibrahim Karaman, Karl T. Hartwig, Laszlo Kecskes, Suveen Mathaudhu, Vincent H. Hammond
|On-Site Speaker (Planned)
A commercial AZ31 magnesium alloy has been processed using a multiple-temperature equal channel angular processing (ECAP) to enhance its mechanical properties by introducing ultra-fine grained structure with grain size of about 400 nm. A total of six to eight passes were applied starting at 200 °C for the first four passes to get advantage of softening through dynamic recrystallization (DRX) and then conducting additional passes at lower temperatures down to 125 °C following a combination of routes A and C, to suppress DRX and grain growth. Tension experiments in the flow direction of the processed sample demonstrated high strength levels up to 385 MPa in yield and 460 MPa in ultimate strength with elongation-to-failure of 14%. In order to improve the ductility, the samples were annealed shortly followed by ECAE. This promising technique enhanced the ductility appreciably without much sacrifice in strength.
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