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Effect of the Particle Size of γ’ Phase on the Mechanical Properties of Ni base Superalloy
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2011 (English)In: Euro Superalloys 2010, Trans Tech Publications Inc., 2011, Vol. 278, 96-101 p.Conference paper (Refereed)
Abstract [en]

The effect of gamma’ particle size upon the mechanical properties of Ni base superalloy EP741NP obtained by powder metallurgy was investigated. The particle size of gamma’ phase in gamma-gamma’ microstructure was varied by changing the cooling rate V from the temperature of the solid solution treatment at 1200 C (V = 80, 200 and 400 C \ min.). After solid solution treatment billets were subjected to aging in the standard mode. It was established that as V increases from 80 to 200 C \ min., the average particle’s size of gamma’ phase decreases from 0.54 microns to 0.22 microns in the aged state. This improves the characteristics of creep and low cycle fatigue at 650C: time to rupture under load 1000 MPa increased from 132 hours to 416 hours and low cycle fatigue increased from 42,215 to 82,016 cycles.

Place, publisher, year, edition, pages
Trans Tech Publications Inc., 2011. Vol. 278, 96-101 p.
, Advanced Materials Research, ISSN 1022-6680 ; 278
Keyword [en]
Microstructure, Powder Metallurgy, Super Alloy
National Category
Condensed Matter Physics
URN: urn:nbn:se:kth:diva-49628DOI: 10.4028/ 000303548400017ScopusID: 2-s2.0-79960662183ISBN: 978-3-03785-113-5OAI: diva2:459905
European Symposium on Superalloys and their Applications, May 25-28, 2010, Wildbad Kreuth, Germany
The Hero-m center (Hierarchic Engineering of Industrial Materials)

QC 20111201

Available from: 2011-11-28 Created: 2011-11-28 Last updated: 2014-08-25Bibliographically approved

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Razumovskiy, Vsevolod I.
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