Preform and Process Design of Ti-۶Al-۴V Compressor Blade using Equipotential Lines and ۳D FE Simulation

Forging is one of the most important processes for production of titanium parts. Selection and evolution of forging parameters such as the forging preforms, part and die temperatures and strain rate are of great importance to achieve optimal process. In this work, a comprehensive study on the near net hot forging of a Ti-۶Al-۴V compressor blade is performed through designing several preforms and simulating the process in several die and preform temperatures. The Equipotential lines method is used for the optimal design of preforms and Johnson-Cook constitutive model is used for ۳D FE simulations and the criteria for selecting the parameters was the material temperature during the process that is necessary for achieving desired properties of Ti-۶Al-۴V parts. According to the results, performing the isothermal forging process in increased speeds could lead to increasing the temperature over the β-transus and improper mechanical properties development. So, finding a proper die and preform temperature is necessarily accomplished in this work. According to results the appropriate temperatures for performing the process using modified ۰.۱v preform and ram speed of ۱mm/s were ۱۰۵۰˚C and ۴۵۰˚C for the preform and die respectively.

کلیدواژه ها:

Equipotential lines method ، FE Simulation ، Hot forging of the Blade ، preform design ، Titanium alloy Ti-۶Al-۴V