|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Magnesium Technology 2017
||Ductility Enhancement in Mg Alloys by Anisotropy Engineering
||Shamik Basu, Ebubekir Dogan, Babak Kondori, Ibrahim Karaman, Amine Benzerga
|On-Site Speaker (Planned)
Anisotropic plasticity is often invoked to rationalize low formability in Magnesium alloys. A mean-field theory suggests however that certain forms of plastic anisotropy hinder ductile damage accumulation. Here, a proof-of-concept is demonstrated in the case of Mg-Al-Zn alloys. Two textures produced by severe plastic deformation are compared with the as-received rolling texture in terms of their anisotropy-ductility correlations at ambient temperature. The 3D plastic anisotropy is characterized in each material using compression and tension specimens. The ductility is characterized using smooth and round-notched tensile bars. A micromechanical model is introduced to rationalize the trends in terms of the anisotropy effect on ductility (AED) index, which in the present experiments is tuned via texture manipulations at fixed chemical composition and grain size. The main finding suggests that plastic anisotropy can be engineered to aid ductility, irrespective of loading orientation or stress state triaxiality.