|About this Abstract
|Materials Science & Technology 2020
|Powder Metallurgy of Light, Reactive and Other Non-ferrous Metals
|Influence of Powder Characteristics, Temperature and Cooling Rate on the Development of the Properties in Ni-Superalloys Processed Using Powder Hot Isostatic Pressing
|Moataz M. Attallah, Alessandro Sergi, James MacDonald
|On-Site Speaker (Planned)
|Moataz M. Attallah
A powder HIP manufacturing route for several Ni-superalloy has been investigated. Several studies were performed focusing on processing-microstructure-property relationships. Scanning electron microscopy (SEM) and electron back-scatter diffraction (EBSD) techniques were used to assess the influence of powder characteristics, heat treatment and HIP parameters. High-temperature mechanical testing was also performed. Excellent tensile properties have been obtained with HIPped material, however, poor creep performance raises concerns regarding the use of powder HIPped Ni-superalloys for long duration aero-engine components. Certain chemistry changes may make a modified version of the alloy more suitable. The HIP process requires further refinement with Ni-superalloys to allow a good balance of high-temperature properties to be obtained, especially through the use of cooling rate and outgassing procedures.