FE Analysis of Microstructure Evolution during Ring Rolling Process of a Large-Scale Ti-6Al-4V Alloy Ring

Abstract

Microstructure evolution during ring rolling process of a large-scale Ti-6Al-4V ring was investigated with the combined approaches of three dimensional finite element method (FEM) simulation and microstructure prediction model. A microstructure prediction model was established by considering the volume fractions and grain size of  and  phases varying with process variables, and grain growth. In order to perform FE simulation for ring rolling process of Ti-6Al-4V alloy, a constitutive equation was generated by utilizing the flow stress data obtained from hot compression tests at different temperature and strain rate conditions. The volume fraction and grain size of  and  phases during ring rolling were calculated by de-coupled approach between FEM analysis and microstructure prediction model. The prediction results were compared with the experimental ones. Our proposed microstructure simulation module was useful for designing hot forming process of Ti-6Al-4V alloy

Reverse vs. Effective Strain in the Ring-Rolling of Superalloy 718

“…There is no lack of papers dealing with the numerical simulation of the ring-rolling operation (e.g., [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]). Here we present a finite element analysis (FEM) of the ring-rolling operation of Superalloy 718 for a geometry and size typical of a low-pressure turbine part, focusing on the reverse vs. effective strains imparted in the operation and on the heterogeneity of their ratio in the section of the ring.…”

Recent development of ring rolling theory and technique

“…Besides, the modelling skill of dual mesh and hybrid mesh was used to improve the simulation accuracy and computational efficiency Ward, 2002b, 2003;Kim et al, 2013). Microstructure evolution during RARR was also tried by FE modelling methods (Yeom et al, 2010;Schwich et al, 2014;Zhu et al, 2014a). Through FE simulation, the deformation behaviour, forming laws and process parameters' effects during RARR were revealed visually (Qian et al, 2013c;Xu et al, 2013;Zhu et al, 2014b;Zhou et al, 2010aZhou et al, , 2011aZhou et al, , 2011bZhou et al, , 2012.…”

Modeling and application of ring stiffness condition for radial-axial ring rolling

“…Kim et al [15] put forward a dua-mesh approach to RARR simulation with high computational efficiency. Simulations of microstructure evolution during RARR have been also tried [16][17][18]. By FE simulation, deformation behaviors during RARR and effects of technological parameters on RARR process have been revealed systematically [19][20][21][22][23].…”