Abstract
Using a rate-sensitive crystal plasticity model together with the full constraint Taylor theory, the formation of textures during biaxial stretching of FCC sheet metals is investigated in detail. Three-dimensional lattice rotation fields, orientation evolution and polycrystalline texture development are simulated for the entire range of biaxial strain ratio. The investigation discloses the paths of orientation development and respective stable end orientations, as well as the relation between the evolution paths and the biaxial strain ratio. Our results show that the formation of textures depends mainly on the behaviour of the α- and βρ fibres in biaxial stretching. The strain ratio affects the composition of the βρ-fibre, as well as the flow direction and velocity of orientations towards and along α and βρ, and thus results in different biaxial-stretching textures. The predictions of FCC biaxial-stretching textures are compared with experimental observations reported in literature. Finally, we discuss the influence of complex strain paths on texture formation.
Highlights
The regular arrangement of atoms which exists in a single crystal leads to anisotropy in the single crystal
In reference (Zhou et al, 1992), we have shown that the minor brass component in the equibiaxial-stretching texture for aluminum results from the initial texture which contains the S component, since the stable end position of the S orientation under equibiaxial stretching is near the brass orientation
Our predicted textures (Figure 14) at the strain 0.25 for p 0.1 and p=l exhibit the same features as their mesurements. Both their measurements and our predictions show that the effects of textures developing during biaxial stretching cannot be ignored for annealed FCC sheet metals
Summary
The regular arrangement of atoms which exists in a single crystal leads to anisotropy in the single crystal. A textured polycrystal merely reflects the well known anisotropy of single crystals Such macroscopic anisotropy of metals is a critical factor for subsequent fabrication processes, and influences as well the mechanical, thermal and electrical properties of products. For all the metals considered, Kohara (1981) observed that the main component for equibiaxial stretching was represented as < O11 >//ND, which is significantly different from rolling textures. He observed that even for a relative small equivalent stretching strain (0.2) the sheet textures were quite different from the initial textures. The formation of FCC textures during biaxial stretching of sheet metals is investigated. The change of the resultant textures with strain paths and initial textures are discussed
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
