Long-Term Heat Treatments on Ti6Al4V-SiCf Composite. Part I - Microstructural Characterization

Riccardo Donnini; Saulius Kaciulis; Alessio Mezzi; Roberto Montanari; Claudio Testani

doi:10.4028/www.scientific.net/MSF.604-605.331

Paper Titles

Hot Formability and Texture Formation in Al Alloys
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Superplastic Deformation of Twin Roll Cast AZ31 Magnesium Alloy
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Study of Hot Formability of High Nitrogen Martensitic Stainless Steel
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Failure at Elevated Temperatures: Influence of Dynamic Restoration
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Long-Term Heat Treatments on Ti6Al4V-SiC_f Composite. Part I - Microstructural Characterization
p.331

Long-Term Heat Treatments on Ti6Al4V-SiC_f Composite. Part II - Mechanical Characterization
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Pre-Primary Stage of Low Strain Rate Creep in Metals
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Constitutive Equations in Creep of the AE44 Magnesium Alloy
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Creep Response and Microstructural Changes during Intermittent Heating of Advanced Tempered Martensitic 9-12%Cr Steels
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Long-Term Heat Treatments on Ti6Al4V-SiC_f Composite. Part I - Microstructural Characterization

Abstract:

The microstructure of Ti6Al4V-SiCf composite, in as-fabricated condition and after long-term heat treatments (up to 1,000 hours) in the temperature range 400 - 600 °C, has been investigated by means of high-temperature X-ray diffraction (HT-XRD), energy dispersion spectrometry (EDS), X-ray photoelectron spectroscopy (XPS) and Auger electron spectroscopy (AES). Particular attention was paid to the strains, arising during heating, and to the micro-chemical evolution of fibre-matrix interface. Micro-chemical examinations evidenced that a thin TiC layer has formed between the fibre carbon coating and the matrix during the fabrication process. TiC slows down further diffusion of carbon towards the matrix and guarantees the interface stability also for the most severe treatments examined here.