X-ray diffraction from hexagonal close-packed crystals with deformation stacking faults. I. Effect of solute segregation at faults in alloys

The Christian–Gevers theory of X-ray diffraction from homogeneous hexagonal close-packed (h.c.p.) crystals with deformation stacking faults is extended to include the effect of segregation of solute atoms at the faults. The results show that the breadths of reflexions remain unaffected by solute segregation. The ratios of integrated intensities of reflexions with H − K ≠ 0 mod 3, L = 1 mod 2 and L = 0 mod 2 respectively are affected, but only to a small extent, that is, within the limits of possible accuracy in experimental measurements of integrated intensity.