Quantitative Stress Analysis of Recrystallized OFHC Cu Subject to Deformation In Situ

摘要: Quantitative strain analysis (QSA) provides a means for assessing the orientation-dependent micromechanical stress states in bulk polycrystalline materials. When combined with quantitative texture analysis, it facilitates tracking evolution of associated selected components specimens deformed situ. To demonstrate this ability, sheet specimen rolled and recrystallized oxygen-free high conductivity Cu was subject to tensile deformation at APS 1-ID-C. Strain pole figures (SPFs) were measured series applied loads, both below above onset macroscopic yielding. From these data, lattice distribution function (LSDF) calculated each load. Due tensorial nature LSDF, full tensor fields can be unambiguously from single-crystal elastic moduli. The orientation (ODF) is used calculate volume-weighted average over tubular volumes centered on ∥[100], ∥[100] fibers-accounting ≈50% total volume-are shown as functions load along [100]. Corresponding weighted standard deviations are well. Different multiaxial observed develop crystal subpopulations despite uniaxial stress. energy density also examined. effects applying bound constraints SPF inversion discussed, extensions QSA examine defect nucleation propagation.