he paper presents a joint application of finite-element-based numerical simulation and real-material-based physical simulation techniques for design and optimisation of the hot forging operations to manufacture high strength stainless steel turbine blades. 2D simulations of the forging steps carried out using a suitably calibrated finite element model are combined with systematic analysis of microstructure evolution during forging experiments, with particular care to formation of the brittle δ-ferrite phase at high temperatures. A correlation is established between microstructure and thermal and mechanical parameters characterising forging operations. On the bases of numerical and experimental results, the actual forging process is re-designed, reducing the total number of forging steps. Industrial trials, conducted with the optimised process parameters, demonstrate the effectiveness of the developed procedure.
Integrating Physical and Numerical Simulation Techniques to Design the Hot Forging Process of Stainless Steel Turbine Blades
BARIANI, PAOLO FRANCESCO;BRUSCHI, STEFANIA;
2004
Abstract
he paper presents a joint application of finite-element-based numerical simulation and real-material-based physical simulation techniques for design and optimisation of the hot forging operations to manufacture high strength stainless steel turbine blades. 2D simulations of the forging steps carried out using a suitably calibrated finite element model are combined with systematic analysis of microstructure evolution during forging experiments, with particular care to formation of the brittle δ-ferrite phase at high temperatures. A correlation is established between microstructure and thermal and mechanical parameters characterising forging operations. On the bases of numerical and experimental results, the actual forging process is re-designed, reducing the total number of forging steps. Industrial trials, conducted with the optimised process parameters, demonstrate the effectiveness of the developed procedure.Pubblicazioni consigliate
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