Defect Reduction and Quality Optimization through the Modelling of Plastic Deformation and Metallurgical Evolution

Abstract

The finite element modelling is a well-established technique in studies of plastic deformation. Many commercial codes, both general purpose or dedicated, implement general constitutive laws sufficient for a first level use. However, some issues need to be addressed by using specific formulations or require more advanced modelling to take into account complex behaviors. In the present contribution, an overview of the main issues that arise in the study of hot deformation processes and their theoretical and software tools available in CSM SPA is presented with their applications to industrial cases. The overview on methodologies for modelling of plastic deformation starts from the more conventional rheological laws, through the implementation of innovative rheological laws, the microstructural and mechanical coupling and tailored material characterization and concludes with the identification of criteria for the evaluation of the internal quality of the finished products, such as the porosity closure. The applications presented concern mainly the rolling of long products.