COMBINED ANALYSIS OF DEFECT CONFIGURATION OF DEFORMED BRASS BY POSITRON ANNIHILATION AND X-RAY DIFFRACTION

The microstructure of alpha brass deformed to various degree ε was examined with positron annihilation technique and X-ray profile analysis. Stretch stress δ, positron annihilation probabilities Γ₁, effective subgrain size D_eff, positron lifetime T₁ , dislocation density ρ, positron lifetime T₂ and T etc. were measured as functions of deformation degree ε . Combined analyses of these curves were performed and positron annihilation models of single vacancy, dislocation, vacancy group and microvoid were suggested.