Anisotropy of strengthening by solid solution and precipitation in concentrated Mg-Al and Mg-Zn alloys

高浓度Mg-Al和Mg-Zn合金固溶和沉淀强化的各向异性。溶质的加入增加了镁在某些结晶方向上的强度，但削弱了材料在其他方向上的强度。这种弱化被称为固溶软化，它对材料的机械性能有深远的影响。在稀相Mg-Al和Mg-Zn合金单晶的棱柱面中观察到固溶软化现象。与纯Mg相比，多晶合金的滑移降低了应变硬化速率，提高了塑性。尽管这些效应具有明显的意义，但尚未在高浓度合金的单晶中进行过研究。这是本项目的主要目标。

Anisotropy of strengthening by solid solution and precipitation in concentrated Mg-Al and Mg-Zn alloys. The addition of solute increases the strength of Mg in some crystallographic directions but weakens the material in others. The weakening is called solid solution softening, and it can have profound effects on the mechanical behaviour of the material. Solid solution softening has been observed in the prismatic planes of single crystals of dilute Mg-Al and Mg-Zn alloys. Easier prismatic slip lowers the strain hardening rate and increases the ductility of polycrystalline alloys in comparison with pure Mg. Despite their obvious significance, these effects have not been studied in single crystals of concentrated alloys. This is the main object of this project.