An X-ray diffraction line profile analysis was made of the α-phase of cold-worked alloys. An anisotropic broadening of the X-ray diffraction lines was interpreted in terms of dislocation-induced strain broadening alone. The dislocations were found to be mainly of screw-type, according to a modified Williamson–Hall analysis. Due to the almost symmetrical shape of the X-ray line profiles, a restricted random dislocation distribution was assumed when performing the modified Warren–Averbach analysis. The dislocation densities were of the order of 1011/cm2, and decreased in annealed specimens. The dislocation arrangement parameter decreased from more than unity for cold-worked samples, to less than unity for annealed samples. This reflected the presence of relatively short-ranged strain fields in annealed samples as compared with cold-worked samples. The relative change in the dislocation arrangement parameter increased with solute concentration.

Dislocation-Induced Line-Broadening in Cold-Worked Pb-Bi Binary Alloy System in the α-Phase using X-ray Powder Profile Analysis. S.N.Dey, P.Chatterjee, S.P.Sen Gupta: Acta Materialia, 2003, 51[16], 4669-77