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Near Conventional Forging of an Advanced TiAl Alloy

Published online by Cambridge University Press:  20 December 2012

Daniel Huber ,
Helmut Clemens  and
Martin Stockinger
Daniel Huber
Affiliation:
Business Development, Research & Innovation, Böhler Schmiedetechnik GmbH & Co KG, Mariazellerstrasse 25, A-8605 Kapfenberg, Austria
Helmut Clemens
Affiliation:
Department Physical Metallurgy and Materials Testing, Montanuniversität Leoben, A-8700 Leoben, Austria
Martin Stockinger
Affiliation:
Business Development, Research & Innovation, Böhler Schmiedetechnik GmbH & Co KG, Mariazellerstrasse 25, A-8605 Kapfenberg, Austria
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Abstract

Balanced mechanical properties are needed for TiAl low pressure turbine blades envisaged for use in new generation aircraft engines. However, thermomechanical processing of γ-TiAl based alloys is a challenging task due to a small “processing window”. Isothermal forging, as state of the art process for this class of material, results in high productions costs and lower productivity. Due to these facts Bohler Schmiedetechnik GmbH & Co KG has developed a higher efficient “near conventional” thermomechanical processing technology. Lower die temperature and processing at standard atmosphere as well as the use of standard hydraulic presses with higher ram speed result in a highly economical process. Subsequent heat treatment strategies can be used to tailor microstructure and, therefore, mechanical properties according to customer needs. The paper summarizes our effort to establish a near conventional forging route for the fabrication of TiAl components for aerospace industry.

Keywords

forgingmicrostructureTi
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1516: Symposium JJ – Intermetallic-Based Alloys—Science, Technology and Applications , 2013 , pp. 23 - 28
Copyright
Copyright © Materials Research Society 2012 

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References

REFERENCES

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