Interaction of the precipitation kinetics of δ and γ' phases in nickel-base superalloy ATI Allvac® 718Plus™

Rene Radis*, Gerald A. Zickler, Martin Stockinger, Christof Sommitsch, Ernst Kozeschnik

*Korrespondierende/r Autor/-in für diese Arbeit

Publikation: Beitrag in Buch/Bericht/KonferenzbandBeitrag in einem KonferenzbandBegutachtung

Abstract

In this paper, the precipitation behaviour of δ (Ni 3(Nb,Al)) and γ' (Ni3(Al,Ti,Nb)) phases in the nickel-base superalloy ATI Allvac® 718Plus™, as well as their kinetic interactions are discussed. Important parameters such as volume fraction, mean radius and number density of precipitates are experimentally determined and numerically simulated as a function of the heat treatment parameters time and temperature. To match the experimentally observed kinetics, the predicted interfacial energy of the precipitates, as calculated for a sharp, planar phase boundary, is adjusted to take into account the interfacial curvature and entropic effects of a diffuse interface. Correction functions for the interfacial energies of δ as well as γ' precipitates are presented. Using these modified interfacial energies, the calculated results show excellent agreement with the experimental measurements.

Originalspracheenglisch
TitelTHERMEC 2009
Seiten2712-2717
Seitenumfang6
DOIs
PublikationsstatusVeröffentlicht - 9 Feb 2010
Veranstaltung6th International Conference on Processing and Manufacturing of Advanced Materials: Thermec 2009 - Technical University-Berlin, Berlin, Deutschland
Dauer: 25 Aug 200929 Aug 2009

Publikationsreihe

NameMaterials Science Forum
Band638-642
ISSN (Print)0255-5476

Konferenz

Konferenz6th International Conference on Processing and Manufacturing of Advanced Materials
KurztitelTHERMEC 2009
Land/GebietDeutschland
OrtBerlin
Zeitraum25/08/0929/08/09

ASJC Scopus subject areas

  • Werkstoffwissenschaften (insg.)
  • Physik der kondensierten Materie
  • Werkstoffmechanik
  • Maschinenbau

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