|About this Abstract
||Materials Science & Technology 2019
||Powder Metallurgy of Light, Reactive and Other Non-ferrous Metals
||The Influence of Atomisation route and Powder Characteristics on the Microstructural and Mechanical Properties Development of HIPped IN625 Ni-Superalloy
||Alessandro Sergi, Alessandro Abena, Raja Khan, Khamis Essa, Moataz M. Attallah
|On-Site Speaker (Planned)
||Moataz M. Attallah
Powder characteristics and atomisation route play a crucial role in controlling the microstructural and mechanical properties development in powder hot isostatic pressing (HIPping) of Ni-superalloys. The atomisation route influences the oxygen content, morphology, and powder size distribution, with the latter influencing the packing density. In this work, the influence of the atomisation process on the microstructure and mechanical properties is assessed in HIPped IN625 by comparing water, nitrogen gas, and argon gas atomised powders. Furthermore, the influence of particle size is presented by analysing fine, coarse and wide range nitrogen gas atomised powders. To this end, a finite element model for the HIPping process was developed to determine the strain energy due to HIPping as a function of powder characteristics. Results reveals that the strain energy can be correlated to the powder packing density, which is manifested in the Σ3 special boundaries fraction generated in the HIPped microstructure.