Transactions of Materials and Heat Treatment

Title：Relationship between deformation and microstructure during precision forming of TC17 titanium alloy front axle neck verified by finite element simulation

Authors： Xu Xianglong

Unit：

KeyWords：

ClassificationCode：TG379

year,vol(issue):pagenumber：2021,46(9):224-229

Abstract：

The material flow velocity, internal temperature field and streamline distribution situation during the forming process of front neck forgings were studied by the analysis method of finite element simulation, and the metal equivalent strain distribution and the change situation of the maximum principal stress for metal in different regions of forgings were studied by the point tracking method. At the same time, the high magnification microstructure of forgings was verified and analyzed by metallographic microscope. Through the research, it is found that the designed geometric sizes of preforming blanks, reduction rate and deformation amount are suitable, and the actual forming conditions are consistent with the results of finite element simulation. During the forming process, the temperature of the larger end of forgings is increased because of the violent flow of material, which causes the forgings to easily appear coarse or mixed crystal area. In addition, the result of temperature distribution shows the temperature drop in the area in contact with the mold is serious. In order to avoid dual-phase structure in the forgings, there should be enough machining allowance in the similar temperature drop area to ensure that the structure and properties of parts meet the requirements of standards.

Funds：

苏春民（1977-），男，本科，研究员级高级工程师 E-mail：suchunmin@163.com

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