Numerical Simulation of Hot Isostatic Pressing with Particular Consideration of Powder Density Distribution and Temperature Gradient
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Beschreibung
The powder HIP production method has many advantages compared with other powder metallurgy manufacturing methods but its usages have not reached its complete potential due to the high cost. Therefore, the main purpose of the thesis is the development of a simulation methodology to replace the capsule design by "trial and error".
The developed material model which combines the influence of time independent plasticity and rate dependent plasticity is used to simulate the powder densification during HIP and to predict the final shape of the HIP components. Distortion problems that occurred in HIP production due to inhomogeneous powder distribution and temperature gradient were also studied. Furthermore, the influence of the capsule thickness on the densification and final shape is studied. The thickness of the capsule is varied in combination to study the shrinkage in different directions of the capsule. Finally, the densification model is integrated with an inverse optimization tool to optimize the initial shape of the capsule. The general methodology to design and optimize the capsule shape in order to get net shape HIP-ed component is presented in a case study.
Autor*in
Chung Van Nguyen
Themen in »Numerical Simulation of Hot Isostatic Pressing with Particular Consideration of Powder Density Distribution and Temperature Gradient«
Densification Hot Isotatic Pressing Near Net Shape