Neutron Diffraction Studies of Cold-Worked Brass

Abstract

Powder diffraction data with neutrons have shown the integrated intensities to be identical in cold-worked (filed) and annealed brass with no trace of extinction effects. Long wavelength transmission studies have also shown that the diffuse scattering is increased by less than 0.4 percent upon severely cold rolling brass. A new technique of examining the Bragg discontinuities supports the hypothesis that the major part of the broadening is due to lattice distortion. Some remarks are presented concerning the analogy between long wavelength neutrons and conduction electrons with respect to scattering by dislocations. The effects of dislocations on coherent scattering are also considered.