Microstructure and Mechanical Propertiesof Ti/Cu-Cr/S20C and Ti/Cu-Ag/S20C Clad Composites

Jong Su Ha; Sun Ig Hong

doi:10.4028/www.scientific.net/AMM.376.153

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 376Microstructure and Mechanical Propertiesof...

Microstructure and Mechanical Propertiesof Ti/Cu-Cr/S20C and Ti/Cu-Ag/S20C Clad Composites

Abstract:

In this study Cu-Ag or Cu-Cr layer was sandwiched by Ti and Fe plates and the three layers of Ti/Cu-8Ag/S20C were clad by High Pressure Torsioning(HPT). The effect of post-HPT heat treatment on the interfacial reaction products and the mechanical performance in Ti/Cu-Ag/S20C and Ti/Cu-Cr/S20C clad material were studied. Cu₄Ti₃ and Cu₄Ti Intremetallic compound layers were observed at the Ti/Cu-Ag and Ti/Cu-Cr interfaces in the clad heat-treated at 500°C where as no intermetallic compounds were observed at the Cu-Ag/S20C and Cu-Cr/S20C interfaces. The strength of as-HPTed Ti/Cu-8Ag/S20C is much higher than that of Ti/Cu-1Cr/S20C. The strengthening mechanism of Cu-Ag deformed severely is the interface and strain hardening in which dislocations are deposited at the Cu/Ag interfaces and can contribute to the strengthening of the clad composite just after HPT processing, rendering the high strength just after processing. In both clad composites, the strength and ductility increased after heat treatment at 350°C, which are likely caused by the enhanced bonding at the interfaces.

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Periodical:

Applied Mechanics and Materials (Volume 376)

Pages:

153-157

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.376.153

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Online since:

August 2013

Authors:

Jong Su Ha, Sun Ig Hong

Keywords:

Clad, Composite, Cu-Ag, Cu-Cr, HPT, Intermetallic, Strength

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