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CASiM² project: HIP Simulation

Researcher(s): Hang Wang

Collaborator(s): Khamis Essa, Moataz Attallah, Hector Basoalto

Hot Isostatic Pressing (HIP) is a process to reduce the pores and increase the density of materials. Creep plays an important role for densification and high temperature behaviour in HIP. However flow and compaction of powder material can be very difficult to measure experimentally. A numerical model offers and excellent method to understand these mechanisms within the powder. In this project, a general creep model has been developed. The microstructure has been taken into account within this creep model, including grain size, gamma-prime particle size, gamma-prime volume fraction, and so on. The regions with/without cavities have also been considered separately in the present model. Different creep properties have been predicted for alloys with different sets of microstructure. The creep model has been applied into the HIP process. The influence of temperature and pressure on the densification has been investigated. The constitutive creep model can be used in the simulation of a number of powder-based processes such as HIP, sintering, and interlayer diffusion bonding.

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