Formation and Interpretation of Micro Residual Stresses in Cold Deformed Brass Alloys
The brass alloys CuZn10 and CuZn37 were cold deformed by uniaxial compression in steps of 5 % res. 10 % to 20 %. Using X-ray synchrotron radiation d versus sin2ψ-distributions were measured. All diagrams showed strong non-linearities which were furthermore different for different hkl. The amplitudes of the oscillations increase with increasing deformation but come to a saturation, for CuZn37 at approximately 10 % compression, for instance. The development of the hkl-dependent residual stresses and the oscillations could be related to different microstructures induced by cold deformation. The Voigt-model suits well to describe the oscillations in d-sin2ψ curves associated with the hot extrusion process which was used for the fabrication of the samples. Moreover, it is shown that additional information obtained from TEM and X-ray line profile analysis is necessary to reproduce the experimental oscillations of d versus sin2ψ-distributions measured in cold deformed samples.
W. Reimers and S. Quander
B. Reetz and W. Reimers, "Formation and Interpretation of Micro Residual Stresses in Cold Deformed Brass Alloys", Materials Science Forum, Vols. 524-525, pp. 937-942, 2006