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HomeMaterials Science ForumMaterials Science Forum Vol. 678Micro-Chemistry and Mechanical Behaviour of...

Micro-Chemistry and Mechanical Behaviour of Ti6Al4V-SiC_f Composite Produced by HIP for Aeronautical Applications

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Abstract:

The paper reports the results of an extensive characterization of the Ti6Al4V-SiC_f composite produced by hot isostatic pressing (HIP) to assess its capability to withstand the in-service conditions of turbine blades operating at middle temperatures in aeronautical engines. The microstructure of composite, in as-fabricated condition and after long-term heat treatments (up to 1,000 hours) in the temperature range 673-873 K, has been investigated by means of different techniques. Particular attention was paid to the micro-chemical evolution of fibre-matrix interface which is scarcely affected also by the most severe heat treatments examined here. This leads to stable mechanical properties as evidenced by hardness, tensile and FIMEC instrumented indentation tests. Therefore, the composite can operate at the maximum temperature (873 K) foreseen for its aeronautical applications without remarkable modifications of its microstructure and degradation of mechanical properties. The mechanical characterization has been completed by internal friction and dynamic modulus measurements carried out both at constant and increasing temperature, from 80 to 1173 K.

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Periodical:

Materials Science Forum (Volume 678)

Pages:

23-47

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.678.23

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Online since:

February 2011

Authors:

Paolo Deodati, Riccardo Donnini, Saulius Kaciulis, Majid Kazemian-Abyaneh, Alessio Mezzi, Roberto Montanari, Claudio Testani, Nadia Ucciardello

Keywords:

Anelastic Behavior, Matrix-Fibre Interface, Microstructural Stability, Ti6Al4V-SiC_f Composite

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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