BEETHOVEN2 - Surface modification of ɣ-TiAl alloys and its influence on mechanical properties and phenomena under high temperature conditions

M.Sc. Christoph Breuner

Motivation

• TiAl turbine blades are lighter than their Ni-based superalloy counterparts and offer the potential for component weight savings of up to 50 %.
• ɣ-TiAl alloys show a poor high temperature oxidation resistance at temperatures above 700°C.

Objective

Extension of the application range of ɣ titanium aluminides by coating

• obtain new knowledge about the influence of surface modification on mechanical properties of ɣ-titanium aluminides
• systematische Ergebnisse über den Einfluss von Oberflächenmodifikationen auf die Ermüdungseigenschaften von ɣ-Titanaluminiden bei verschiedenen Temperaturen liefern.

Methods

• Testing different coatings

• Fatigue tests on servo hydraulic testing machines

• Tests at room temperature and up to 750°C

• Investigation of the fracture surfaces

Project partners

• DLR (Köln)
• SUT (Katowice, Polen)
• IFM (Gliwice, Polen)

Förderung