Optimisation of a multiphase intermetallic metal–metal composite material
Authors: Robson, J.D.; Duvauchelle, N.; Lugan, A.; Street, J.; Bhadeshia, H.K.D.H.
Source: Materials Science and Technology, Volume 17, Number 3, March 2001 , pp. 333-337(5)
Publisher: Maney Publishing
Abstract:Metal–metal composites (MeMeCs) manufactured by coextruding β[Ni(Al,Ti)], β′[Ni2AlTi] and γ′[Ni3(Al,Ti)] show promise as high strength, heat resistant materials. The best combination of strength and plasticity are obtained by using a high fraction (0·8) of γ′ as the matrix phase combined with equal fractions of β and β′ reinforcement. Further improvements in properties may be obtained by increasing the fracture strength of the matrix phase following the methods used in monolithic γ′ alloys. Boron additions are shown to lead to significant improvements in tensile fracture strength. The highest levels of plasticity were obtained in an MeMeC material which had a matrix composition designed to allow the more ductile γ phase to precipitate in the γ′, as well as containing boron to increase grain boundary cohesion. Fractography suggests that tensile failure occurs in this material in a much more ductile way, with evidence of local plastic deformation and a largely transgranular failure mode rather than the intergranular fracture observed in the other MeMeC materials.
Document Type: Regular Paper
Affiliations: Department of Materials Science and Metallurgy, University of Cambridge, Pembroke Street, Cambridge CB2 3QZ, UK (firstname.lastname@example.org)
Publication date: 2001-03-01
- Materials Science and Technology is Journal of the Month in November. This means free online access to all of the last 3 years of content, including the most recently published 2013 articles! Find out more here
In 1985 Metal Science was incorporated into Material Science and Technology: See issues of Metal Science from 1985 to present. The archive also includes the complete run of Metals Technology (1974–84): Click here to see these issues.
- Editorial Board
- Information for Authors
- Subscribe to this Title
- Terms & Conditions
- Online submission site
- ingentaconnect is not responsible for the content or availability of external websites