We consider polycrystals with perfectly plastic grains. We study the two-dimensional problem that results if the textures and applied stresses are compatible with antiplane deformation. We show that the order of magnitude of recently introduced outer bounds on the strength domain of polycrystals is sharp even under the assumption of square symmetry on the texture. We also conclude that the fact...

In this study, the texture evolutions of two Mg materials during tension are explored. In-situ X-ray synchrotron and Visco-Plastic Self-Consistent (VPSC) modeling employed to investigate different deformation modes between pure Mg–15Gd (wt.%) alloy. These with a strong extrusion show large slip/twinning activity behaviors tensile deformation. The basal ?a? slip has highest contribution initial ...

The evolution of surface topography and crystallographic texture was investigated under balanced biaxial stretching in sheets of the aluminum alloy 5052-H32. Two different lots of material, with an initial nominal thickness of 1 mm, were tested in the as-received condition. Samples with increasing levels of balanced biaxial strain were deformed using a modified Marciniak in-plane stretching tes...

A large number of polycrystalline materials, both manmade and natural, display preferred orientation of crystallites. Such alignment has a profound effect on anisotropy of physical properties. Preferred orientation or texture forms during growth or deformation and is modified during recrystallization or phase transformations and theories exist to predict its origin. Different methods are applie...