Hochverformung von intermetallischen γ-Titanaluminiden

Translated title of the contribution: Severe Plastic Deformation of γ-based Titaniumaluminides

Eva Eidenberger

Research output: ThesisDiploma Thesis

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Abstract

In the past 20 years there has been a great emphasis placed on developing intermetallic γ-titaniumaluminides (TiAl) because of their outstanding high temperature properties. These TiAl alloys are supposed to replace nickel-based superalloys in their applications. Since the plastic deformation of these materials at room temperature is rather limited, the deformation behavior at room temperatures using high-pressure torsion was investigated in the present work. Subsequently, the effect of high strain on microstructure and mechanical properties of two- and three-phase intermetallic γ-TiAl-based alloys, in particular TNM alloys, was investigated. From the results of SEM, XRD and nano-hardness tests a partial disordering of the ordered phases can be assumed. Moreover, the deformation by HPT has a significant effect on the volume fraction of the βo-phase. It was found that the volume phase fraction decreases with increasing degree of deformation.
Translated title of the contributionSevere Plastic Deformation of γ-based Titaniumaluminides
Original languageGerman
QualificationDipl.-Ing.
Supervisors/Advisors
  • Pippan, Reinhard, Co-Supervisor (internal)
  • Mayer, Svea, Co-Supervisor (internal)
  • Clemens, Helmut, Supervisor (internal)
Award date29 Jun 2012
Publication statusPublished - 2012

Bibliographical note

embargoed until null

Keywords

  • Intermetallic materials
  • TiAl
  • γ-TiAl
  • TNM
  • Severe Plastic Deformation
  • High Pressure Torsion
  • disordering
  • βo-phase
  • phase fraction

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