Comparative Analysis of Flow Stress Distribution in CM247LC Superalloy during Hot Deformation: A Study Using Gleeble 3800 GTC and Q-Form 3D Simulation

This study investigates the deformation behaviour of the CM247LC superalloy through a combination of physical experimentation and computational analysis. High temperature deformation was conducted at 600°C, 800°C, and 1000°C with a strain rate of 0.001 s⁻¹ and 50% of deformation. This research integrates microstructural analysis and mathematical equations to enhance understanding of the alloy's response under varying conditions. The findings reveal that at 600°C, the superalloy exhibits high flow stress and significant ultimate strength due to limited dynamic recovery (DRV) and restricted dynamic recrystallization (DRX). The increase in yield strength from 708 MPa at 600°C to 814 MPa at 800°C is attributed to effective precipitation strengthening from the γ' phases, corroborated by FEM simulations that show higher average yield strength values ranging from 875 MPa to 900 MPa at 800°C. Microstructural analysis indicates the role of finely dispersed carbides at lower temperatures and their coarsening at higher temperatures, which affects the material's strain-hardening behaviour and softening mechanisms. While physical simulations provide empirical data on mechanical properties and microstructural changes, FEM simulations predict stress-strain distributions and identify potential instability regions.