Assessment of dynamic softening mechanisms in Allvac® 718Plus™ by EBSD analysis

Stefan Mitsche, Christof Sommitsch, Daniel Huber, Martin Stockinger, Peter Poelt

Research output: Contribution to journalArticleResearchpeer-review

Abstract

The nickel-based superalloy Allvac® 718Plus™ is a future candidate for turbine disc applications, as this new material combines the formability and cost advantages of Alloy 718 with the higher temperature capability of Waspaloy. Due to the strong influence of the microstructure on the final mechanical properties, a fundamental knowledge of the dynamic recrystallization mechanism of Allvac® 718Plus™ is of great importance in order to develop precise microstructure evolution models for this material. Compression tests were performed at temperatures of 900°C to 1050°C and strain rates between 0.1s-1 and 10s-1. The microstructures obtained were analyzed by electron backscatter diffraction (EBSD) to evaluate the influence of the different hot forming parameters on the dynamic softening processes of Allvac® 718Plus™.

Original languageEnglish
Pages (from-to)3754-3760
Number of pages7
JournalMaterials Science and Engineering A
Volume528
Issue number10-11
DOIs
Publication statusPublished - 25 Apr 2011

Fingerprint

Electron diffraction
softening
microstructure
Microstructure
Waspaloy
diffraction
hot working
electrons
Dynamic recrystallization
compression tests
heat resistant alloys
turbines
Formability
Nickel
Superalloys
strain rate
Strain rate
Compaction
Turbines
nickel

Keywords

  • Dynamic recrystallization
  • EBSD
  • Recrystallization mechanism
  • Superalloy 718Plus

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Assessment of dynamic softening mechanisms in Allvac® 718Plus™ by EBSD analysis. / Mitsche, Stefan; Sommitsch, Christof; Huber, Daniel; Stockinger, Martin; Poelt, Peter.

In: Materials Science and Engineering A, Vol. 528, No. 10-11, 25.04.2011, p. 3754-3760.

Research output: Contribution to journalArticleResearchpeer-review

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