The Organization And Evolution Of Deformation During The Forging Process Of ZrTiAlV Alloy

ZrTiAlV alloy is a new type of alloy which has the advantages of both titanium alloy and zirconium alloy. Therefore, ZrTiAlV alloy can be used as a component of aerospace structural material and nuclear industry material. The main forming method for its forgings is hot forging and the forging process parameters has great impact on the microstructure and mechanical properties of ZrTiAlV alloy forgings.Therefore,the constitutive equation and Microsture evolution models can be established through experiments and the finite element software Deform-3D can be used to simulate the hot forming process of ZrTiAlV alloy forging,then predict its microstructure distribution.So as to guide the actual production better.In this paper, hot compression tests were conducted on ZrTiAlV alloy by Gleeble-3800 thermal simulated machine. Stress-strain curves of ZrTiAlV alloy under different deformation conditions were obtained. The influence rule of deformation conditions on the stress is analyzed. Then through the fitting of experimental data, thermal deformation performance parameters of ZrTiAlV alloy as a function of Z parameter were established. And the constitutive model suitable for hot deformation process of ZrTiAlV al oy was established further based on the hyperbolic sine equations of Arrhenius-type.The influence rule of different deformation parameter on mean grain size, recrystallized grain size, recrystallization volume fraction of ZrTiAlV alloy during hot deformation process was obtained through the metallographic sample preparation for the compression specimens and the statistic analysis of data. The dynamic recrystallization model, meta-dynamic recrystallization model and static recrystallization model of Zr TAl V i al oy during hot forging process were established based on statistic data.The established constitutive model and microstructure evolution models were imported into Deform-3D software to simulate the forming process of Turbine disc forgings. According to the simulation results, the forming conditions of the for ging and the change rule of stress, strain and et al were analyzed. And the mean grain size, the recrystallized grain size, the recrystallization volume fraction and some other microstructure evolution parameter were predicted.