The Effects of Rolling and Annealing on the High Speed Impact Deformation Behavior of Mg-3%Li-1%Ce Alloy

Abstract:

In this paper, the effects of rolling and annealing on the high speed impact deformation behavior of the Mg-3%Li-1%Ce alloy were investigated by using the Hopkinson compressive bar. The results showed that the microstructures of the as-rolled alloy consisted mainly of deformed grains, with some secondary Mg₁₂Ce particles in grain interior or on grain boundary. After annealing at 350 °C for one hour, static recrystallization happened and grains were significantly refined. For the annealed alloy, the impact stress-strain behavior is non-sensitive to strain rate in the strain rate range of 1000~1750 s^-1. Under the strain rate of 2250 s^-1, the dynamic behavior demonstrated negative strain rate effect. The occurrence of cracking was supposed to be the main reason for the strain rate softening effect.

• Periodical: Advanced Materials Research (Volumes 415-417)
• Pages: 1090-1095
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.415-417.1090
• Online since: December 2011
• Authors: Teng Liu, Gui Ying Sha, He Nan Wang, Xiao Lei Wang, Yu Hong Zhu
• Keywords: Rolling , Annealing, Impact Deformation, Mg-Li-Ce Alloy, Strain Rate

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DOI: 10.4028/www.scientific.net/amr.295-297.2261