Discrete element modeling of powder metallurgy processes

Opis książki:

The proposed doctoral dissertation presents a numerical and experimental analysis of manufacturing of new materials by powder metallurgy techniques. The main part of the doctoral dissertation is dedicated to the theoretical and numerical investigations. An original numerical model of a powder metallurgy process has been formulated and implemented within the discrete element framework. The proposed model allows to study the motion (shrinkage and rearrangement) of powder particles during compaction and sintering stage and takes into account the growth of cohesive necks. In order to verify, calibrate and validate the numerical model, several simulations of hot pressing and sintering process have been performed. The results presented in this thesis have shown that the developed original discrete element model is an effective and suitable tool to analysis phenomenon occurring during the powder metallurgy process. Numerical model allows to study the material mechanism both at microscopic (such as a rearrangement and interaction of powder particles) and macroscopic scale (such as shrinkage, material densification or macroscopic stress). Presented results allow to the conclude that the new discrete element model can be applied to development and optimization of powder metallurgy processes.