Prediction of deformation behavior and microstructure evolution in heavy forging by FEM

• Published in: International journal of advanced manufacturing technology Vol. 40; no. 3-4; pp. 253 - 260
• Main Authors: Ma, Qiu, Lin, Zhong-qin, Yu, Zhong-qi
• Format: Journal Article
• Language: English
• Published: London Springer London 2009; Springer Nature B.V
• Subjects: Boundary conditions; CAE) and Design; Computer simulation; Computer-Aided Engineering (CAD; Constitutive equations; Constitutive relationships; Engineering; Evolution; Finite element method; Forging; Grain size; Heat treating; Industrial and Production Engineering; Mathematical analysis; Mathematical models; Mechanical Engineering; Media Management; Microstructure; Original Article; Plastic deformation; Predictions; Strain hardening; Yield strength; Rotary forging method; Heavy container head; Deformation behavior; Microstructure evolution; FEM
• ISSN: 0268-3768; 1433-3015
• DOI: 10.1007/s00170-007-1337-9

A numerical simulation of multi-stage heavy forging process using the finite element method (FEM) is presented in this study. The process of heavy forging is highly non-linear, where both microstructure and boundary conditions are altered by plastic deformation during forming. Therefore, it is necessary to understand the problem of plastic deformation in heavy forging. In order to investigate deformation behavior and microstructure evolution in heavy forging, a constitutive equation considering the effects of strain hardening and dynamic softening of the IN718 alloy is built. The constitutive equation and microstructure models are implemented into the finite element code to simulate deformation behavior and microstructure evolution in the rotary forging of heavy container head. As a result, variations of flow stress, effective strain, temperature, damage, and grain size in every stage are predicted.