Analysis of Deformation and Internal Defect in Flat-Wedge Cross-Wedge Rolling of GH4169 Superalloy

Abstract:

The deformation and internal defect in the flat-wedge cross-wedge rolling (CWR) of GH4169 superalloy were investigated numerically using a coupled thermo-mechanical finite element analysis (FEA) model. The simulation analysis showed that the temperature distribution in the work piece was non-uniform during the flat-wedge CWR. When the initial temperature of the work piece was relatively low, the work piece temperature increased, a heating effect of the plastic deformation, while relatively high initial work piece temperatures resulted in cooling the work piece, caused by the work piece contact with the tools. It is noted that the increase of tools moving speeds is helpful to reduce the generation of internal defects in the flat-wedge CWR of GH4169 alloy. An important tendency is that both increasing the tools temperature and decreasing friction coefficient all can contribute to avoiding the center defects in the flat-wedge CWR of GH4169 alloy

• Periodical: Materials Science Forum (Volume 879)
• Pages: 324-329
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.879.324
• Online since: November 2016
• Authors: Yan Chen, Hong Yan Gan, Shi Hong Zhang*, Ming Cheng, Hong Wu Song
• Keywords: Cross Wedge Rolling, Finite Element Analysis, GH4169 Superalloy, Internal Defect

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