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首页> 外文会议>International Conference on Superplasticity in Advanced Materials >Superplastic Forming Response of a Friction Stir Processed Mg Alloy Sheet - A Numerical Approach
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Superplastic Forming Response of a Friction Stir Processed Mg Alloy Sheet - A Numerical Approach

机译：摩擦搅拌加工镁合金板的超塑性成形响应 - 一种数值方法

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Friction stir process (FSP) is a severe plastic deformation based secondary processing technique that can be utilized to engineer novel microstructures in metallic alloys. It is well known that such techniques are cumbersome and require significant experimental work and material to determine optimum processing conditions. Therefore in this work, we propose a new two step numerical approach, where: (ⅰ) CFD simulations coupled with Zener-Holloman relation are used to predict microstructure evolution in stirred, transition and heat affected zones of friction stir processed AZ31 Mg alloy sheets, (ⅱ) Finite element simulations are carried out to evaluate superplastic forming characteristics of different microstructures developed after FSP. Simulation trends including forming pressure profiles, dome height evolution, and thickness distribution of friction stir processed sheets are compared with those of the base material. The proposed combination of numerical approaches to model both processing and forming aspects yields a powerful tool to study and optimize processing and forming technologies with limited experimentation.
机译：摩擦搅拌过程（FSP）是一种严重的塑性变形的二次加工技术，可用于工程在金属合金中的新型微观结构。众所周知，这种技术是麻烦的，需要显着的实验工作和材料来确定最佳的加工条件。因此，在这项工作中，我们提出了一种新的两步数字方法，其中：（Ⅰ）CFD模拟与齐纳 - 霍马关系相结合，用于预测搅拌，过渡和热影响的摩擦搅拌加工AZ31mg合金板的微观结构演化， （Ⅱ）进行有限元模拟，以评估FSP后产生的不同微观结构的超塑性成形特性。将仿真趋势包括形成压力型材，圆顶高度演化和摩擦搅拌加工片材的厚度分布，与基材的基材进行比较。拟议的模型方法的组合既是加工和形成方面的拟议方法都产生了一种强大的工具，用于研究和优化具有有限实验的处理和形成技术。

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