|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Magnesium Technology 2016
||High Temperature Tensile Behaviors and Deformation Mechanisms of Mg-x%Al Alloys
||Jiaxing Ji, Fubo Bian, Tiangang Niu, Min He, Jun Qiao
|On-Site Speaker (Planned)
Effects of Al and its content on high temperature tensile behaviors and deformation mechanisms of Mg-xAl (x=2, 3, 4, 6 wt. %) alloys were investigated. Elongation-to-failure tests were conducted at constant temperatures of 300, 350, 400, and 450 ℃, and constant strain rates of 10-2 and 10-3 s-1. Strain-rate-change tests were conducted at the same temperatures and varying strain rate from 5×10-5 to 2×10-2 s-1. Experimental results show that elongations of over 100% are achieved for each Mg-xAl alloy when deformed at 450 ℃ and 10-3 s-1, which are ascribed to an evident drop of stress exponent due to Al addition. Particularly, the stress exponent decreases with an increase of Al content, indicating a potential variation of deformation mechanism. The mechanisms were analyzed and discussed in terms of activation energy, grain boundary sliding, and dislocation creep.
||Planned: A combination print-CD volume