The Use of In Situ Characterization Techniques for the Development of Intermetallic Titanium Aluminides

Abstract:

Urgent needs concerning energy efficiency and environmental politics require novel approaches to materials design. One recent example is thereby the implementation of light-weight intermetallic titanium aluminides as structural materials for the application in turbine blades of aero-engines as well as in turbocharger turbine wheels for the next generation of automotive engines. Each production process leads to specific microstructures which can be altered and optimized by thermo-mechanical processing and / or subsequent heat-treatments. To develop sound and sustainable processing routes, knowledge on solidification processes and phase transformation sequences in advanced TiAl alloys is fundamental. Therefore, in-situ diffraction techniques employing synchrotron radiation and neutrons were used for establishing phase fraction diagrams, investigating advanced heat-treatments as well as for optimizing thermo-mechanical processing. Summarizing all results a consistent picture regarding microstructure formation and its impact on mechanical properties in advanced multi-phase TiAl alloys can be given.

• Periodical: Materials Science Forum (Volumes 783-786)
• Pages: 2097-2102
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.783-786.2097
• Online since: May 2014
• Authors: Svea Mayer*, Emanuel Schwaighofer, Martin Schloffer, Helmut Clemens
• Keywords: Alloy Development, Intermetallic, Neutron Diffraction, Titanium Aluminide, X-Ray

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