Hot Deformation Characteristics of Spray Formed Nickel Based P/M Superalloy

Na Liu; Z. Li; G.Q. Zhang; H. Yuan; W.Y. Xu; Y. Wang

doi:10.4028/www.scientific.net/MSF.788.565

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HomeMaterials Science ForumMaterials Science Forum Vol. 788Hot Deformation Characteristics of Spray Formed...

Hot Deformation Characteristics of Spray Formed Nickel Based P/M Superalloy

Abstract:

The hot deformation behavior of a nickel based P/M superalloy by spray forming and hot isostaticpressingwas investigated by isothermal compression test at Gleeble 3500 thermal mechanical simulator. The compression test was performed in the temperature ranging from 1025°C to 1150°C and in the strain rate ranging from 10^-1/s to 10^-3/s. The results show that the flow curves of true stress and true strain exhibit typical dynamic recrystallization and dynamic recovery. Compression temperature and strain rate have a strong effect on the dynamic recrystallization grain refinement.With higher strain rate the refined dynamic recrystallizationmicrostructure can be obtained at deformation temperature lower thanγ′solution temperature. Grain coarsening occurs at the deformation temperature close to γ′solution temperature, and the grain grows up obviously with decreasing strain rate.

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Periodical:

Materials Science Forum (Volume 788)

Pages:

565-568

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.788.565

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Online since:

April 2014

Authors:

Na Liu*, Z. Li, G.Q. Zhang, H. Yuan, W.Y. Xu, Y. Wang

Keywords:

Dynamic Recrystallization (DRX), Hot Deformation, P/M Superalloy, Spray Forming

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