화학공학소재연구정보센터
Materials Science Forum, Vol.408-4, 1161-1166, 2002
Issues related to texture in high performance steels
Investigations have been conducted on the texture formation in various high performance steels and some recent results have been summarized. An addition of phosphorous in high strength interstitial free steels resulted in the development of gamma-fibre texture components and the r-value was improved. This appeared to be attributed to the combined effects of phosphorous on the grain size and the energy stored during cold rolling. In low carbon steels, the planar anisotropy was reduced when Ti was added. A visco-plastic self-consistent polycrystal model was developed to predict the macroscopic anisotropy. The yield surface was calculated by coupling the model with the Monte Carlo technique. The model was also applied to calculate the yield strength anisotropy observed in high microalloyed hot strips. The anisotropy was shown to be reduced by decreasing the alpha-fibre intensity. Analyses of the effects of pass aging on texture in silicon steels have been attempted to determine the optimum pass aging temperature, which was found to be 150similar to250degreesC. In a ferritic stainless steel, the ridging phenomenon was directly associated with the existence of grain clusters or grain colonies having both {001}<110> and {112}<110> texture components.