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Friction Welding of Intermetallic Titanium Aluminides: Microstructural Evolution and Mechanical Properties

  • S. Mayer , L. Appel , H. Cramer and H. Clemens
Published/Copyright: June 11, 2013
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Practical Metallography
From the journal Practical Metallography Volume 48 Issue 11

Abstract

Intermetallic titanium aluminides have the potential to replace currently used nickel-based superalloys in high temperature applications in the medium term owing to their attractive properties profile. They will mainly be used for aircraft and automobile engines. The production of individual components of aircraft or automobile engines requires an easily applicable and reliable joining technology in order to produce complex component structures as a consequence of costs incurred for machining them from solid. Friction welding plays a key role when it comes to an economical use of titanium aluminide materials in lightweight constructions and high temperature applications. The present work describes this pressure welding technique using an extruded γ-TiAl-based alloy Ti-43.5Al-4Nb-1Mo-0.1B (at%). It compares and discusses the microstructural evolution and mechanical properties of joints of the same kind.

Kurzfassung

Intermetallische Titanaluminide besitzen in Anbetracht ihres attraktiven Eigenschaftsprofils das Potential mittelfristig in Hochtemperaturanwendungen die bisher im Einsatz befindlichen Nickel-Basis-Superlegierungen zu ersetzen, wobei sich der Schwerpunkt auf Flugzeugtriebwerke und Automobilmotoren richtet. Die Herstellung einzelner Triebwerks- bzw. Motorenkomponenten verlangt, infolge anfallender Kosten für die Zerspanung aus dem Vollen, eine einfach anwendbare und zuverlässige Fügetechnologie zur Herstellung komplexer Bauteilstrukturen. Dem Reibschweißen kommt sozusagen eine Schlüsselfunktion zum wirtschaftlichen Einsatz der Titanaluminid-Werkstoffe für Leichtbau- und Hochtemperaturanwendungen zu. Im Folgenden wird dieses Pressschweißverfahren an der γ-TiAl-Basislegierung Ti-43,5Al-4Nb-1Mo-0,1B (at%) im stranggepressten Zustand beschrieben. Die Gefügeentwicklung und mechanischen Eigenschaften der artgleichen Verbindung werden einander gegenübergestellt und diskutiert.

Translation: E. Engert

Svea Mayer born in 1981, studied Materials Science at the Montanuniversität Leoben, Austria. She received a PhD for the research work on the influence of various microstructures on the mechanical properties of hot-work tool steels in 2009. Since then, she is leading the working group on phase transformations at the Department of Physical Metallurgy and Materials Testing.

Helmut Clemens born in 1957, is head of the Department of Physical Metallurgy and Materials Testing at the Montanuniversität Leoben. Since 1991 he is working on intermetallic materials, with special focus on titanium aluminides. His interest centers on alloy development, processing and microstructure-property relationships.

References/Literatur

[1] Kestler, H.; Clemens, H.: Production, Processing and Applications of g(TiAl)-Based Alloys, in: Titanium and Titanium Alloys, C.Leyens, M.Peters (Ed.), WILEY-VCH, Weinheim, 2003Search in Google Scholar

[2] Kim, Y.-W.; Morris, D.; Yang, R.; Leyens, C.: Structural Aluminides for Elevated Temperature Applications, TMS, Warrendale, 2008Search in Google Scholar

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[4] Appel, F.; Oehring, M.: g-Titanium Alloys: Alloy Design and Properties, in: Titanium and Titanium Alloys, C.Leyens, M.Peters (Ed.), WILEY-VCH, Weinheim, 2003Search in Google Scholar

[5] Clemens, H.; Wallgram, W.; Kremmer, S.; Güther, V.; Otto, A.; Bartels, A.: Adv. Eng. Mater.10 (2008) 8) 707–71310.1002/adem.200800164Search in Google Scholar

[6] Merkblatt DVS 2713: Schweißen von Titanwerkstoffen, Deutscher Verlag für Schweißtechnik (DVS), Düsseldorf, 2003Search in Google Scholar

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Received: 2011-1-13
Accepted: 2011-4-27
Published Online: 2013-06-11
Published in Print: 2011-11-01

© 2011, Carl Hanser Verlag, München

Articles in the same Issue

  1. Contents/Inhalt
  2. Contents
  3. Editorial
  4. Editorial
  5. Technical Contributions/Fachbeiträge
  6. Friction Welding of Intermetallic Titanium Aluminides: Microstructural Evolution and Mechanical Properties
  7. Production and Metallographic Examination of Precipitable Cu–Mg Alloys
  8. The Characterisation of a Powder Metallurgically Manufactured TNM™ Titanium Aluminide Alloy Using Complimentary Quantitative Methods
  9. Intercrystalline and Transcrystalline Vibration Fatigue Failure in the Inconel 718 Nickel-Based Alloy
  10. Meeting Diary/Veranstaltungskalender
  11. Meeting Diary
https://doi.org/10.3139/147.110131

Articles in the same Issue

  1. Contents/Inhalt
  2. Contents
  3. Editorial
  4. Editorial
  5. Technical Contributions/Fachbeiträge
  6. Friction Welding of Intermetallic Titanium Aluminides: Microstructural Evolution and Mechanical Properties
  7. Production and Metallographic Examination of Precipitable Cu–Mg Alloys
  8. The Characterisation of a Powder Metallurgically Manufactured TNM™ Titanium Aluminide Alloy Using Complimentary Quantitative Methods
  9. Intercrystalline and Transcrystalline Vibration Fatigue Failure in the Inconel 718 Nickel-Based Alloy
  10. Meeting Diary/Veranstaltungskalender
  11. Meeting Diary
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