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

Abstract:

Article Preview

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.

Info:

Periodical:

Edited by:

Mohamed A. Taha, Ahmed M. El-Sabbagh and Iman M. Taha

Pages:

263-270

DOI:

10.4028/www.scientific.net/KEM.425.263

Citation:

P. Deodati et al., "Anelastic Phenomena at the Fibre-Matrix Interface of the Ti6Al4V-SiCf Composite ", Key Engineering Materials, Vol. 425, pp. 263-270, 2010

Online since:

January 2010

Export:

Price:

$35.00

In order to see related information, you need to Login.

In order to see related information, you need to Login.