Metallurgical aspects of deformation processing

提案中详细介绍的研究主题概述如下。1. 静态和准静态再结晶的组合模型。 将与澳大利亚同事M.巴内特和警察。霍奇森 这将简化工业米尔斯轧机轧制负荷的建模。2. 静态和准静态再结晶动力学模型。 与Dr. E合作。Poliak和A. Najafizadeh，将开发一种方法，允许机架间软化的影响进行预测时，加工硬化是由于不完全再结晶积累。3. 变形奥氏体的变量选择。 一个模型，占变形奥氏体的转变后出现的纹理组件正在改善使用EBSD（电子背散射衍射）技术。4. 陨石的转化特征 陨石在穿过太阳系的过程中冷却非常缓慢。 将确定在这些条件下发生的相变的特性，以便解决关于在这些条件下适用的取向关系的一些问题。5. Al-Mg合金的粗晶超塑性 虽然超塑性通常与细晶粒材料有关，但它也可以在特定条件下在粗晶粒金属中产生。 目前正在研究造成这种不寻常影响的机制，以确定工业应用的可能性。6. 镁合金物理冶金学基础。 镁合金的孪晶和断裂行为在各种工业条件下正在研究中。 特别重要的是在成形操作期间应变路径和温度的影响。

The research topics described in more detail in the proposal are summarized below. 1.  A Combined Model for Static and Metadynamic Recrystallization.  A single model covering both mechanisms will be developed in association with Australian colleagues M. Barnett and P.D. Hodgson.  This will simplify the modeling of rolling load in industrial mills. 2.  Modeling the Kinetics of Static and Metadynamic Recrystallization.  In collaboration with Drs. E. Poliak and A. Najafizadeh, an approach will be developed permitting the effect of interstand softening to be predicted when work hardening is being accumulated due to incomplete recrystallization. 3.  Variant Selection in Deformed Austenite.  A model that accounts for the texture components that appear after the transformation of deformed austenite is being improved by the use of EBSD (electron backscatter diffraction) techniques. 4.  Transformation Characteristics of Meteorites.  Meteorites cool very slowly during their passage through the solar system.  The characteristics of the phase transformation that takes place under these conditions will be determined so as to resolve some issues regarding the orientation relationships that apply under these conditions. 5.  Coarse-Grained Superplasticity in Al-Mg Alloys.  Although superplasticity is usually associated with fine-grained materials, it can also be produced in coarse-grained metals under particular conditions.  The mechanisms responsible for this unusual effect are being studied with a view to determining the possibility of industrial application. 6.  Fundamentals of the Physical Metallurgy of Magnesium Alloys.  The twinning and fracture behavior of Mg alloys is being studied under various conditions of industrial interest.  Of particular importance are the effects of strain path and temperature during forming operations.