Subscribe to the EPMA Mailing List

Regularities Of The Microstructure Formation Of Rapidly Quenched Powders Of Ni-based Superalloys Produced By PREP-technique

  • : Andrei Shulga1
  • : 1National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)
  • : PDF Download
  • : 2018


A multi-scale study of the microstructure of various size spherical powder particles of the rapidly quenched powders of the two Ni-based superalloys produced by PREP-technique for using in PM HIP technology was performed. Methods of metallography autoradiography on carbon and boron SEM EDX EBSD were used to study the microstructure and distribution of alloying elements with low and high magnification. The composition of matrix segregations of the alloying elements and precipitates of the carbides and borides phases was determined. Effects of the spherical particles size on the regularities of the microstructure formation were revealed. Growth of dendrites   with slightly larger dendrite arm spacing was observed in bigger spherical powder particles preferably from the surface. Whereas in smaller particles was observed formation of the cellular structure on surface and dendrite crystals in the bulk of particles. Effect of superalloy composition on the features of dendrites structure and precipitates composition was defined.


Non-EPMA member price shown. If you are an EPMA member please log in for your discount.
If you are logged in as a member but are still seeing this message, please contact us at
If you would like to find out about becoming an EPMA member, click here.
This product is currently only available to purchase via this website to companies with a valid EU VAT Number. If you are an individual or company without an EU VAT number wishing to purchase this, please contact EPMA directly at Alternatively, past Euro PM papers are available via ProQuest and Elsevier.
* This field is required
Go To Top