Anelastic Phenomena at the Fibre-Matrix Interface of the Ti6Al4V-SiC<sub>f</sub> Composite-Reference-Cited by-同舟云学术

Anelastic Phenomena at the Fibre-Matrix Interface of the Ti6Al4V-SiC_f Composite

Published:2010-01 Issue: Volume:425 Page:263-270
ISSN:1662-9795
Container-title:Key Engineering Materials
language:
Short-container-title:KEM

Author:

Deodati Paolo¹,Donnini Riccardo¹,Kaciulis Saulius²,Mezzi Alessio²,Montanari Roberto¹,Testani Claudio³,Ucciardello Nadia¹

Affiliation:

1. University of Rome - Tor Vergata

2. Instituto per lo Studio dei Materiali Nanostrutturati CNR

3. Centro Sviluppo Materiali, SpA. (CSM)

Abstract

The composite, consisting of Ti6Al4V matrix reinforced by unidirectional SiC fibres (SCS-6), has been investigated by mechanical spectroscopy at temperatures up to 1,173 K. For comparison, the same experiments have been performed on the corresponding monolithic alloy. The internal friction (IF) spectrum of the composite exhibits a new relaxation peak superimposed to an exponentially increasing background. This peak, which is not present in the monolithic alloy, has an activation energy H = 186 kJ mol-1 and a relaxation time 0 = 2.3 x 10-15 s. The phenomenon has been attributed to a reorientation of interstitial-substitutional pairs in the  phase of Ti6Al4V matrix around the fibres. This explanation is supported by the results of micro-chemical characterization carried out by X-ray photoelectron spectroscopy (XPS) combined with Ar ion sputtering.

Publisher

Trans Tech Publications, Ltd.

Subject

Mechanical Engineering,Mechanics of Materials,General Materials Science

Link

https://www.scientific.net/KEM.425.263.pdf

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