Rolling and annealing textures in low carbon steels

A ROATTA,; A FOURTY,; R. E. BOLMARO

Pittsburgh

Congreso; 15th International Conference on Textures of Materials; 2008

Pittsburgh University. Materials Science Department.

The current work shows applications of texture development simulation techniques to the processing of low carbon steels. The final textures in steel sheets are influenced by their alloy chemistry as well as by the processing parameters by consecutive application of hot rolling, cold rolling and annealing. Some textures are difficult to find in the literature and hardly obtainable by the current development of measurement techniques. High temperature phase textures are certainly impossible to measure immediately after hot rolling. Holding the material at high temperature, with the sole purpose of measuring, will not guarantee having the same material afterwards. Those textures are only available by back simulation from texture measurements at low temperature after phase transformation or are inferred from measured analog materials. Textures of high and low temperature phases after high temperature rolling and low temperature rolling and recrystallization textures are addressed in the current presentation. For the simulation of deformation processes a polycrystalline viscoplastic selfconsistent code is employed. The prediction of recrystallization textures is carried out by the analysis of the deformation micromechanical variables, stored energy, nucleation and grain growth. The martensitic transformation phenomenon is described by using the empiric Kurdjumov-Sachs model with variant selection activated by taking in account different mechanisms. The results are compared with experimental values from literature when available. The work attempts to be a whole process analysis intended to fill blanks on both experiments and simulations. The results are conclusive in some aspects of the interaction between experiments and simulations.