Evaluation of the Electrical Conductivity and Mechanical Properties of Cu–3Ti–1.5Ni–0.5Si Quaternary Alloy

A high strength and super electrical conductive Cu–3Ti–1.5Ni–0.5Si quaternary alloy with improved hardness and ductility has been developed. The alloy components were melted in an inert gas controlled vacuum melting furnace, rapidly cooled in ice, homogenized at 900°C for 5 h, and age heat treated a...

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Bibliographic Details
Published in:JOM (1989) 2022-11, Vol.74 (11), p.4174-4180
Main Authors: Nnakwo, K. C., Odo, J. U., Eweka, K. O., Okafor, J. S., Ijomah, A. I., Maduka, E. A., Ugwuanyi, B. C.
Format: Article
Language:English
Subjects:
Aging
Alloy development
Alloys
Chemistry/Food Science
Copper
Ductility
Earth Sciences
Electrical resistivity
Elongation
Engineering
Environment
Grain size
Hardness
Heat treatment
High strength alloys
Homogenization
Mechanical properties
Melting furnaces
Morphology
Particle size
Particle size distribution
Physics
Precipitation hardening
Quaternary alloys
Rare gases
Recent Advances in Multicomponent Alloys and Ceramics
Scanning electron microscopy
Solid solutions
Tensile strength
Titanium
Vacuum melting
Vacuum melting furnaces
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Summary:A high strength and super electrical conductive Cu–3Ti–1.5Ni–0.5Si quaternary alloy with improved hardness and ductility has been developed. The alloy components were melted in an inert gas controlled vacuum melting furnace, rapidly cooled in ice, homogenized at 900°C for 5 h, and age heat treated at an aging temperature of 480°C for 1, 2, 3, 4, and 5 h, respectively. The strength, hardness, ductility, and the electrical conductivity of the developed alloys were investigated and the microstructure analyzed using scanning electron microscopy (SEM). The average grain size and particle size distributions were obtained and discussed. Results show that the alloy recorded high strength and hardness of 760 MPa and 385 HV, respectively, after aging for 5 h. These improvements were linked with the minimal average grain size of ~4.5 µm and uniform particle size distribution. Excellent electrical conductivity and percentage elongation with maximum values of 37.4% IACS and 25.1%, respectively, were also recorded after 1 h. The studied Cu–3Ti–1.5Ti–0.5Si alloy demonstrated excellent combinations of ductility, strength, hardness, and electrical conductivity.
ISSN:1047-4838
1543-1851
DOI:10.1007/s11837-022-05293-1