Finite Element Simulation of Upsetting Deformation Process for TC21 Titanium Alloys
By using finite element simulation technology,the modeling based on thermo-mechanical coupling with three dimensional entity for the upsetting deformation process of TC21 titanium alloys was carried out,and then the variation laws of temperature fields,equivalent stress fields and damage values in terms of the workpieces under different deformations were analyzed.The analytical results showed that during the deformation process,the distribution of stresses in the cores of the workpieces was uneven and where there was a phenomenon of temperature rising,while the areas of the large deformation regions of the workpieces gradually increased with increasing of the deformation amount and the phenomenon of temperature rising in the core was so intensified that the deformation temperature could be increased by 20℃.After upsetting or forging deformation,the damaged areas of TC21 titanium alloys mainly concentrated on the bulges at both ends of the workpieces.When the deformation amount increased from 30%to 70%,the bulging deformation degree gradually intensified,and the maximum damaged values of the workpieces gradually increased to 0.443 from 0.127.And therefore in order to avoid the generation of defects,the amount of upsetting deformation should be strictly controlled in industrial production.
TC21 titanium alloysanalog simulationupsetting deformationdamaged value
万方数据
维普
