Effects of grain size, texture and twinning on mechanical properties and work-hardening behaviors of pure Mg

Pure magnesium sheets and wires with various microstructures and texture type were obtained using different deformation parameters and heat treatment methods. The work-hardening behaviors of pure Mg sheets and wires during tensile tests at room temperature were investigated. Effects of grain size, texture, twinning and alloying elements on work-hardening behaviors are discussed. The experimental results are analyzed by the Lukac and Balik hardening model: theta = A/(sigma-sigma(0.2)) + B-C(sigma-sigma(0.2))-D(sigma-sigma(0.2))(3); changes of parameters in the formula with the factors mentioned above are discussed in detail. Theoretical models for work-hardening rate with changing of grain size, texture, twinning and alloying elements are given in this article. (c) 2013 Elsevier B.V. All rights reserved.