Age-Hardening Characteristics of Cu-Ni-Si Alloy after Cold Deformation

Abstract:

The microstructural features and heat treatment response of Cu-2.1Ni-0.5Si-0.2Zr-0.05Cr (wt.%) alloy have been investigated. The alloy was aged at 400°C、450°C and 500°C after a cold deformation of 70% reduction. The variation in hardness and electrical conductivity of the alloy was measured as a function of aging time. The results indicated the highest peak hardness value of approximately 205HV for the alloy aged at 400°C for 4h after the solution treatment and cold deformation. The alloy has two main phases, one is Ni2Si phase, and the other is Cr2Zr phase. The strengthening mechanisms of the alloy include spinodal decomposition strengthening, ordering strengthening and precipitation strengthening.

• Periodical: Applied Mechanics and Materials (Volumes 217-219)
• Pages: 294-298
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.217-219.294
• Online since: November 2012
• Authors: Xiang Peng Xiao, Bai Qing Xiong, Qiang Song Wang, Guo Liang Xie, Lijun Peng
• Keywords: Electrical Conductivity, Hardness, Microstructural Features, Strengthening Mechanisms

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