Hot Isostatic Consolidation of P/M Superalloys.
HENRY KRUMB SCHOOL OF MINES NEW YORK
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The kinetics of powder consolidation, or densification, and the powder morphological changes occurring during hot isostatic pressing HIP are studied as a function of particle size distribution and hold time at HIP temperature for the nickel base superalloy RENE-95. In order to understand the extent of individual powder particle deformation during consolidation and its effect on subsequent prior particle boundaries PPB, particle size distribution was studied as a variable. Particle size distributions studied include monosized 75-90 micrometers, bimodal 75-90 micrometers and 33-35 micrometers and commerical 104 micrometerss size distribution. The experimental results of HIP densification kinetics are compared with a newly developed analytical deformation mechanism model for HIP consolidation which takes into account the effect of a distribution of particle sizes on the kinetics of densification. Author
- Metallurgy and Metallography