Effect of Heating Rate on the Pressureless Sintering Densification of a Nickel-Based Superalloy

Hot isostatic pressing of nickel-based superalloys has important applications for manufacturing near-net shape parts such as turbine disks and jet engine parts, which have to operate at high temperatures. Finite element modelling can be used to predict deformation and densification behaviour of such superalloys. Thus, the cost and time of trial and error to obtain the required geometry of the part can be reduced, such that near-net shape parts can be manufactured more economically. Numerical simulations were carried out by implementing the model of ElRakayby and Kim into Abaqus-FEA. The model parameters (relative density functions f and c) for the nickel-based superalloy were obtained from the creep response and compressive strength of porous and solid powder compacts at high a temperature. The agreement between finite element calculations and the experimental data was good for densification, shape change and density distribution of nickel-based superalloy during hot isostatic pressing.

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“…Levasseur and Brochu [11] showed the effect of heating rate of a pressureless sintering process on densification of a nickel-based superalloy.…”

Section: Introductionmentioning

confidence: 99%

“…Chang et al [10] studied the effect of heat treatment on microstructure and mechanical properties of hipped Inconel 718 compacts. Levasseur and Brochu [11] showed the effect of heating rate of a pressureless sintering process on densification of a nickel-based superalloy.…”

Section: Introductionmentioning

confidence: 99%