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Modelling work hardening and micro structure

机译：建模工作硬化和微观结构

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The work hardening model developed over the last five years by Nes, Marthinsen and co-workers has been further developed. It is outlined how the model can be applied either together with a texture model (FC-Taylor) or with a yield surface (Von Mises) suitable for implementation into FEM-soft-ware. These two approaches are compared for a given example: A first stage of deformation in plane strain compression is followed by a second stage at a lower strain rate with continued plane strain compression or uniaxial tension. The second stage is also calculated in the transverse direction. Finally the model is used to explain experiments by Lloyd and Kenny showing an alloy (AlNi2) that softens when heavily cold worked. The explanation rests on the strong increase of the misorientation across sub-boundaries for this type of alloy containing a high volume fraction of hard particles.
机译：Nes，Marthinsen及其同事在过去五年中开发的工作强化模型得到了进一步发展。概述了如何将模型与纹理模型（FC-Taylor）或适合于在FEM软件中实施的屈服面（Von Mises）一起应用。对于给定的示例，将这两种方法进行了比较：在平面应变压缩的第一阶段变形之后，是在较低的应变速率下继续平面应变压缩或单轴拉伸的第二阶段。第二阶段也在横向上计算。最后，该模型用于解释劳埃德（Lloyd）和肯尼（Kenny）的实验，该实验显示了经过严重冷加工的合金（AlNi2）会软化。对于这种类型的含有大量硬质颗粒的合金，解释是基于跨子边界的取向错误的强烈增加。

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