Intermetallic titanium aluminides have attracted considerable industrial interest for aero and automotive applications owing to their specific strength. These alloys are candidates for high-temperature applications such as turbine blades and turbocharger turbine wheels. In this work, the mechanical behaviour of an as-cast Ti–47Al–3Cr–3Nb (at.-%) alloy was studied. Four-point bending tests were performed to determine the mechanical properties of the alloy at both room and high temperatures. Microhardness and Young’s modulus were evaluated by dynamic indentation tests at room temperature. Analyses of the as-cast alloy showed that, with the selected production process conditions, it has a duplex microstructure. Tests revealed that, while at room temperature the alloy is brittle, between 700 and 900°C it exhibits good ductility and mechanical properties.

Mechanical properties of a TiAl-based alloy at room and high temperatures / Brotzu, A.; Felli, F.; Marra, F.; Pilone, D.; Pulci, G.. - In: MATERIALS SCIENCE AND TECHNOLOGY. - ISSN 0267-0836. - 34:15(2018), pp. 1847-1853. [10.1080/02670836.2018.1491931]

Mechanical properties of a TiAl-based alloy at room and high temperatures

a. brotzu;F. Felli;F. Marra;D. Pilone
;
G. Pulci
2018

Abstract

Intermetallic titanium aluminides have attracted considerable industrial interest for aero and automotive applications owing to their specific strength. These alloys are candidates for high-temperature applications such as turbine blades and turbocharger turbine wheels. In this work, the mechanical behaviour of an as-cast Ti–47Al–3Cr–3Nb (at.-%) alloy was studied. Four-point bending tests were performed to determine the mechanical properties of the alloy at both room and high temperatures. Microhardness and Young’s modulus were evaluated by dynamic indentation tests at room temperature. Analyses of the as-cast alloy showed that, with the selected production process conditions, it has a duplex microstructure. Tests revealed that, while at room temperature the alloy is brittle, between 700 and 900°C it exhibits good ductility and mechanical properties.
2018
intermetallics; mechanical properties at elevated temperatures; mechanical properties at room temperature; TiAl alloys; materials science (all); condensed matter physics; mechanics of materials; mechanical engineering
01 Pubblicazione su rivista::01a Articolo in rivista
Mechanical properties of a TiAl-based alloy at room and high temperatures / Brotzu, A.; Felli, F.; Marra, F.; Pilone, D.; Pulci, G.. - In: MATERIALS SCIENCE AND TECHNOLOGY. - ISSN 0267-0836. - 34:15(2018), pp. 1847-1853. [10.1080/02670836.2018.1491931]
File allegati a questo prodotto
File Dimensione Formato  
Brotzu_Mechanical-properties-TiAl_2018.pdf

solo gestori archivio

Tipologia: Versione editoriale (versione pubblicata con il layout dell'editore)
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 2.6 MB
Formato Adobe PDF
2.6 MB Adobe PDF   Contatta l'autore

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1175168
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 31
  • ???jsp.display-item.citation.isi??? 25
social impact