Investigation of Fundamental Behavior of Single Crystals and Polycrystalline Solids for Application to Metal Forming

单晶本构方程的实验研究 和多晶行为将进行重点放在 测定颗粒间的相互作用， 多晶聚集体。 这将通过测量来实现 的局部有限塑性变形，以及 多晶体的整体有限塑性变形。 压缩， 拉伸和双轴压缩实验将在 具有非常大的晶粒尺寸（4-12 mm）的多晶体，从而使其 可以确定每个晶粒中的局部变形。 材料 和晶格旋转将使用标记的网格或小 应变片法和X射线衍射法。 测试样品将由非常高纯度的铝制成， 样品可以含有二十至三十格令， 典型的多晶行为。 实验也将 在多晶体（具有规则或正常晶粒尺寸）上进行， 为了确定更好的有限塑性本构模型， 这些固体的变形。

An experimental study of the single crystal constitutive equations and polycrystal behavior will be carried out with emphasis on the determination of grain interaction in the behavior of polycrystalline aggregates. This will be achieved by measurements of the local finite plastic deformation in each grain, as well as global finite plastic deformation of the polycrystal. Compression, tension and biaxial compression experiments will be performed on polycrystals with very large grain size (4-12 mm), thus making it possible to determine local deformation in each grains. Material and lattice rotations will be measured using marked grid or small strain gage rosettes and x-ray diffraction technique, respectively. Test samples will be made from very high purity aluminum and each sample may contain twenty to thirty grains in order to obtain a representative polycrystal behavior. Experiments will also be performed on polycrystals (with regular or normal grain size) in order to determine better constitutive models for finite plastic deformation of these solids.