Methodology for Modelling Diffusion Bonding in Powder Forging

Abstract:

Interfacial bonding has a significant influence on the quality of processed components formed by powder forging. Consequently, modelling the bonding process is important for controlling the condition of the components and predicting optimum forging process parameters (e.g. forming load, temperature, load-holding time, etc.). A numerical model was developed in the present work to simulate diffusion bonding (DB) during the direct powder forging (DF) process. A set of analytical equations was derived and implemented in the finite element (FE) software Abaqus via a user-defined subroutine. The DB model was validated using a two-hemisphere compression simulation. The numerical results demonstrated that the DB model has the ability to: 1) determine the bonding status between powder particles during the forging process, and 2) predict the optimum value for key powder forging process parameters. The DB model was also implemented in a representative volume element (RVE) model which was developed in an earlier work to simulate the powder forging process by considering particle packing and thermo-mechanical effects.

• Periodical: Key Engineering Materials (Volume 716)
• Pages: 817-823
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.716.817
• Online since: October 2016
• Authors: Yi Wang*, Idris K. Mohammed, Daniel S. Balint
• Keywords: Direct Forging, Interfacial Bonding, Numerical Model of Diffusion Bonding, RVE Model

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