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 Lukác and Balík hardening model: θ=A/(σ−σ0.2)+B−C(σ−σ0.2)−D(σ−σ0.2)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.