δ-phase characterization of superalloy Allvac 718 Plus™

Christof Sommitsch*, Christoph Stotter, Harald Leitner, Stefan Mitsche, Ilse Letofsky-Papst, Martin Stockinger

*Korrespondierende/r Autor/in für diese Arbeit

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

Abstract

Nowadays, the trend goes to better and more efficient gas turbine engines with low emission, great durability and low cycle cost. Therefore, a new grade, Allvac 718 Plus™, shall enhance the high temperature properties. The appearance, morphology and control of δ-phase are of special interest because of their critical influence on grain structure, grain size and mechanical properties. In this work, the evolution of the δ-phase during a heat treatment between 900 and 1000°C for annealing times of up to 8 hours is investigated in order to determine the time temperature precipitation (TTP) diagram and to understand the phase morphology. For this, different analysis methods are applied, such as light microscopy analysis with computer-aided quantitative metallography, differential scanning calorimetry (DSC) and both scanning electron (SEM) and transmission electron microscopy (TEM).

Originalspracheenglisch
TitelTMS2008 - 137th Annual Meeting and Exhibition Supplemental Proceedings
UntertitelMaterials Processing and Properties
Seiten63-68
Seitenumfang6
PublikationsstatusVeröffentlicht - 26 Sep 2008
VeranstaltungTMS 2008 Annual Meeting Supplemental: Materials Processing and Properties - New Orleans, LA, USA / Vereinigte Staaten
Dauer: 9 Mär 200813 Mär 2008

Publikationsreihe

NameTMS Annual Meeting
Band2

Konferenz

KonferenzTMS 2008 Annual Meeting Supplemental: Materials Processing and Properties
LandUSA / Vereinigte Staaten
OrtNew Orleans, LA
Zeitraum9/03/0813/03/08

ASJC Scopus subject areas

  • !!Condensed Matter Physics
  • !!Mechanics of Materials
  • !!Metals and Alloys

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