Determining Hot Deformation Behavior of an Advance High Strength Steel (AHSS) by Means of Dynamic Processing Maps

摘要

The deformation behavior of an Advance High Strength Steel (AHSS) with a composition of 0.22C-1Si-2Mn was investigated by means of dynamic processing maps. The flow stress curves, which were determined by tensile tests within the temperature range of 1173 and 1573 K and at strain rates between 10~(?3) and 1 s~(?1), were used for constructing the processing maps based on the Dynamic Materials Modeling approach (DMM). These maps were used to evaluate the optimum thermomechanical processing conditions by identifying the stable “safe” regions for plastic flow. Microstructure and fracture analysis of the test samples was performed and correlated to the processing maps. This analysis was used for determining the “safe” domains within the maps whereby plastic flow can be optimum for processing the material. This study will allow us in determining optimal industrial processing routes for producing these steels and to achieve the highest quality of the end product.