Processing and Properties of γ-TiAl for Turbocharger and Power Plant Applications

  1. Prof. Dr. P. Neumann4,
  2. Dr. D. Allen5 and
  3. Prof. Dr. E. Teuckhoff6
  1. V. Lupinc1,
  2. M. Marchionni1,
  3. G. Onofrio1,
  4. M. Nazmy2,
  5. M. Staubli2,
  6. B. Phillipsen3 and
  7. K-H. Rohne3

Published Online: 5 JAN 2006

DOI: 10.1002/3527606181.ch57

Steels and Materials for Power Plants, Volume 7

Steels and Materials for Power Plants, Volume 7

How to Cite

Lupinc, V., Marchionni, M., Onofrio, G., Nazmy, M., Staubli, M., Phillipsen, B. and Rohne, K.-H. (2000) Processing and Properties of γ-TiAl for Turbocharger and Power Plant Applications, in Steels and Materials for Power Plants, Volume 7 (eds P. Neumann, D. Allen and E. Teuckhoff), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, FRG. doi: 10.1002/3527606181.ch57

Editor Information

  1. 4

    Max-Planck-Institut für Eisenforschung, Max-Planck-Str. 1, 40237 Düsseldorf, Germany

  2. 5

    ABB Asltom Power UK Ltd., Cambridge Road, Whetstone, Leicester LE9 GLH, United Kingdom

  3. 6

    Siemens AG, Postfach 3240, 91050 Erlangen, Germany

Author Information

  1. 1

    CNR-TEMPE, Milan, Italy

  2. 2

    ABB ALSTOM POWER, Baden, Switzerland

  3. 3

    ABB Turbo Systems, Baden, Switzerland

Publication History

  1. Published Online: 5 JAN 2006
  2. Published Print: 27 JUN 2000

Book Series:

  1. EUROMAT 99

ISBN Information

Print ISBN: 9783527301959

Online ISBN: 9783527606184

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Keywords:

  • steels for power plants;
  • materials for power plant;
  • processing;
  • properties;
  • γ-TiAl;
  • turbocharger applications

Summary

The aim of this paper is to report on a γ-TiAl turbocharger rotor application in a large diesel engine, tested in real operation. The conventional turbine wheels of turbocharger rotors are made of nickel-base superalloy with a density of about 8 g/cm3. Since the weight reduction of such a component is very important in increasing its response, advanced ceramics would appear very attractive due to the very low density of 3.2 g/cm3 and have been examined for turbocharger rotor application. Nevertheless, a lot of disadvantages mainly related to the brittleness of this class of material and to the large difference between the ceramic and the metal casing thermal expansion coefficients came from this choice.

The attractive combination of high strength and low density, 4.1 g/cm3, of gamma TiAl has drawn the attention of investigations to apply such material to small turbocharger wheels. The expected advantages of such intermetallic turbine, with about 45 mm in diameter, over nickelbase IN713LC as well as over the ceramic, have been reported (10).