现有变形镁合金属密排六方结构，且晶格轴比大、层错能低，变形镁合金加工工艺单一，在变形时易形成强烈基面织构和孪生，且对基面织构形成过程和机理缺乏深入研究，从而限制了新型弱基面织构的变形镁合金的发展与应用。本项目通过研究材料特征参数的计算与表征及其与塑性变形机制和基面织构关系、研究合金成分-材料特征参数-塑性变形机制-变形织构之间的内在联系、研究溶质原子和偏聚对微观结构和再结晶机制及织构的影响机制、研究揭示促进非基面滑移和晶粒c轴倾转的非对称应力应变条件、模拟和计算多种新型形变模式条件下的剪切应变和非均匀应变及基面织构参数之间的表达模型、研究和表征在非对称形变过程中典型变形镁合金的原子迁移行为与排列特征、微结构演变与非基面晶粒c轴取向演变规律，最终揭示宏观织构的形成过程和基面织构弱化机理，建立弱化基面织构的成分调控准则和非对称形变工艺调控准则，提出成分与工艺控制途径和非对称加工技术原型。

Wrought magnesium alloys have a HCP structure, a big c/a ratio and a low stack fault energy. Their process is the general simple rolling or extrusion. The strong basal texture and twinning are easily formed and meanwhile the mechanism is not clear and needs to be deeply studied so that the development and application of wrought magnesium alloys with a weak texture is restrained. In this project, through investigating the calculation and characterization of materials parameters and the relationship with plastic deformation mechanism, basal texture and them, investigating the interinsic relationship among alloy composition - materials parameters - deformation mechanism - basal texture, studing the effects of solute atom and its segerigation on microstructure, recrystallization, and basal texture, uncovering the stress and strain conditions to promote the non-basal slide and c-axis tilt, simulating and calculating the shear strain and asymmetric strain through multiple deformation models and the expression equation between basal texture and them, characterizing the atom motion and arrangement, microstructure evolution and non-basal c-axis orientationof typical magnesium alloys during asymmetric deformation, finally the formation and mechanism of macro-texture will be clearified, the regulation rules of alloy composition and asymmetric deformation will be established to weaken the basal texture, and the control method of composition and process and the technology prototype will be proposed.