Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 586, Issue -, Pages 367-373Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2013.08.035
Keywords
Copper alloys; Nanocrystalline materials; Mechanical alloying; Ultra high strength; Electrical conductivity
Categories
Funding
- 863 Project of the Ministry of Science and Technology of the People's Republic of China [2006AA03Z517]
Ask authors/readers for more resources
A nanocrystalline Cu-10 wt%Nb alloy, with high strength and high conductivity, was prepared by mechanical alloying and subsequent hot pressing. The microstructure and properties of the alloys after consolidation at different temperatures were investigated. The alloy, subjected to hydrogen-annealing of milled powders at 560 degrees C for 1 h and then vacuum hot-pressing sintering under 30 MPa pressure and 900 degrees C for 2 h, has a microhardness of 334 HV, a tensile strength of 1102 MPa, a yield strength of 1043 MPa, and an electrical conductivity of 57% IACS (International Annealing Copper Standard). The as processed alloy is characterised by Nb nanoparticles dispersed in the nanocrystalline Cu matrix. The high strength of Cu-Nb alloy is related with the microstructure, i.e. the nanocrystalline grains produce the grain boundary strengthening, while the Nb nanoparticles produce the precipitation strengthening. The grain boundaries and the nanoparticles are also found to influence the electrical conductivity of the alloy considerably. (C) 2013 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available