δ-phase characterization of superalloy Allvac 718 Plus™

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

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

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).

Original languageEnglish
Title of host publicationTMS2008 - 137th Annual Meeting and Exhibition Supplemental Proceedings
Subtitle of host publicationMaterials Processing and Properties
Pages63-68
Number of pages6
Publication statusPublished - 26 Sep 2008
EventTMS 2008 Annual Meeting Supplemental: Materials Processing and Properties - New Orleans, LA, United States
Duration: 9 Mar 200813 Mar 2008

Publication series

NameTMS Annual Meeting
Volume2

Conference

ConferenceTMS 2008 Annual Meeting Supplemental: Materials Processing and Properties
CountryUnited States
CityNew Orleans, LA
Period9/03/0813/03/08

Keywords

  • Allvac 718Plus™
  • Delta-phase
  • Nickel-base superalloy

ASJC Scopus subject areas

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

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  • Cite this

    Sommitsch, C., Stotter, C., Leitner, H., Mitsche, S., Letofsky-Papst, I., & Stockinger, M. (2008). δ-phase characterization of superalloy Allvac 718 Plus™. In TMS2008 - 137th Annual Meeting and Exhibition Supplemental Proceedings: Materials Processing and Properties (pp. 63-68). (TMS Annual Meeting; Vol. 2).