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Intermetallic Titanium Aluminides as Innovative High Temperature Lightweight Structural Materials – How Materialographic Methods Have Contributed to Their Development

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Published/Copyright: December 3, 2015
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Practical Metallography
From the journal Practical Metallography Volume 52 Issue 12

Abstract

The present article is considered the continuation of the two review articles “Intermetallische γ-Titanaluminid-Basislegierungen aus metallographischer Sicht” (“Intermetallic γ titanium aluminide based alloys from a metallographic point of view”) by H. Clemens and F. Jeglitsch in Pract. Metallogr. 37 (2000) 194 – 217 and “Intermetallische γ-Titanaluminid-Basislegierungen aus metallographischer Sicht – eine Fortsetzung” (“Intermetallic γ titanium aluminide based alloy from a metallographic point of view – a continuation”) by H. Clemens and S. Mayer in Pract. Metallogr. 48 (2011) 64 – 100. With reference to a γ TiAl based alloy specifically developed for aircraft engines, the so-called TNM alloy, this third and concluding part describes how materialographic methods, in combination with a targeted use of complementary investigation methods, have contributed to their development, manufacture, and processing, and, eventually, to their industrial launch. In this context, the alloy development strategy is discussed and representative microstructures and nanostructures are shown and described after different processing and heat treatment processes. Selected case studies from materialographic examinations are presented and interpreted using, for each and every of these aspects, approaches from the fields of physical metallurgy und metal physics.

Kurzfassung

Der vorliegende Artikel versteht sich als Fortsetzung der beiden Übersichtsartikel „Intermetallische γ-Titanaluminid-Basislegierungen aus metallographischer Sicht“ von H. Clemens und F. Jeglitsch in Prakt. Metallogr. 37 (2000) 194 – 217 und „Intermetallische γ-Titanaluminid-Basislegierungen aus metallographischer Sicht – eine Fortsetzung“ von H. Clemens und S. Mayer in Prakt. Metallogr. 48 (2011) 64 – 100. Dieser dritte und abschließende Teil beschreibt am Beispiel einer speziell für Flugzeugtriebwerke entwickelten γ-TiAl-Basislegierung, der so genannten TNM-Legierung, wie materialographische Methoden mit gezieltem Einsatz von komplementären Untersuchungsverfahren zu ihrer Entwicklung, Herstellung und Verarbeitung und schlussendlich zu ihrer industriellen Einführung beigetragen haben. In diesem Zusammenhang wird die Strategie bei der Legierungsentwicklung erörtert, wie auch repräsentative Mikro- und Nanostrukturen nach unterschiedlichen Verarbeitungs- und Wärmebehandlungsprozessen dargestellt und beschrieben. Zu jedem dieser Punkte werden Fallbeispiele aus materialographischen Untersuchungen gezeigt, die unter Verwendung metallkundlicher und metallphysikalischer Ansätze interpretiert werden.

Translation: E. Engert

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Received: 2015-09-09
Accepted: 2015-09-14
Published Online: 2015-12-03
Published in Print: 2015-12-15

© 2015, Carl Hanser Verlag, München

Articles in the same Issue

  1. Contents/Inhalt
  2. Contents
  3. Editorial
  4. Editorial
  5. Technical Contributions/Fachbeiträge
  6. Intermetallic Titanium Aluminides as Innovative High Temperature Lightweight Structural Materials – How Materialographic Methods Have Contributed to Their Development
  7. Report on the 49th Metallography Conference From 16th to 18th of September in Dresden
  8. An Investigation of Ant-Nest Corrosion caused by the Leakage of a Copper Tube – Finned Heat Exchanger of an Air Conditioning Unit
  9. Meeting Diary/Veranstaltungskalender
  10. Meeting Diary
https://doi.org/10.3139/147.110366

Articles in the same Issue

  1. Contents/Inhalt
  2. Contents
  3. Editorial
  4. Editorial
  5. Technical Contributions/Fachbeiträge
  6. Intermetallic Titanium Aluminides as Innovative High Temperature Lightweight Structural Materials – How Materialographic Methods Have Contributed to Their Development
  7. Report on the 49th Metallography Conference From 16th to 18th of September in Dresden
  8. An Investigation of Ant-Nest Corrosion caused by the Leakage of a Copper Tube – Finned Heat Exchanger of an Air Conditioning Unit
  9. Meeting Diary/Veranstaltungskalender
  10. Meeting Diary
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