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

对单晶本构方程和多晶行为进行实验研究，重点是确定晶粒相互作用在多晶聚集体行为中的作用。这将通过测量每个晶粒的局部有限塑性变形以及多晶的全局有限塑性变形来实现。压缩、拉伸和双轴压缩实验将在非常大的晶粒尺寸（4-12 mm）的多晶上进行，从而可以确定每个晶粒的局部变形。材料和晶格旋转将分别使用标记网格或小应变计玫瑰花和x射线衍射技术进行测量。测试样品将由非常高纯度的铝制成，每个样品可能包含20到30个晶粒，以获得具有代表性的多晶行为。实验也将在多晶体（具有规则或正常晶粒尺寸）上进行，以便确定这些固体有限塑性变形的更好的本构模型。

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.