THE EFFECT OF A SUPERIMPOSED STRAIN FIELD ON FRICTIONAL TEXTURE MEASUREMENTS

In this communication we propose an interpretation of friction-induced sub-surface texture results obtained by Krause et al. [1]. The variat ion of X-ray texture measurements with depth in single phase metals wa s found to increase sharply, peaking at a small depth from the surface then decaying slowly into the sample. However, TEM studies showed a c ontinuous and exponential decrease in grain rotation with depth [2]. W e argue that the X-ray texture results reflect an experimental artifac t originating from the superposition of the sub-surface residual stres ses with grain rotation to give the observed peak in the X-ray texture measurements.