EFFECT OF TEXTURE ON THE SNOEK RELAXATION IN A COMMERCIAL ROLLED STEEL

This paper reports that determination of the concentration of foreign interstitial atoms dissolved in ferrite strongly depends on texture in commercial rolled carbon-manganese steel. It was found that the Snoek peak observed in samples cut at the angle of 45 degrees to the rollin g direction (RD) is higher by around 45% than for perpendicularly or t ransversely cut specimens. Strong anisotropy of the Snoek relaxation i s explained with use of the three-dimensional orientation distribution function (ODF). The existence of direct relationship between the heig ht of the Snoek relaxation and the texture components was proved and s upported further by mechanical loss measurements in ultra-high purity polycrystalline alpha-Iron samples having the same texture but differe nt grain sites. In contrast to other results reported in the literatur e the effect of grain size on the Snoek peak is negligible in comparis on to the strong influence of the texture. The results reported in thi s paper have important implications for steel industry and have alread y been put into practice for the last seven years.