Simultaneous Increases of Tensile Strength and Electrical Conductivity by Deep Cryogenic Treating in Cu-Fe and Cu-Cr In-Situ Composites

Abstract:

Deep cryogenic treating (DCT) was applied on Cu-14Fe and Cu-8Cr in-situ composites and its effects on mechanical property and electrical conductivity of the composites were investigated. For comparison, the effects of DCT on properties of the corresponding composites with 0.1%Ag alloying (i.e. Cu-14Fe-0.1Ag and Cu-8Cr-0.1Ag) were also investigated. The results showed that the ultimate tensile strengths of Cu-14Fe and Cu-8Cr were greatly raised by 106MPa and 56MPa after DCT, respectively, whereas those of the Cu-14Fe-0.1Ag and Cu-8Cr-0.1Ag remained unchanged. The increments of electrical conductivity in Cu-14Fe and Cu-8Cr were much higher than those in corresponding Cu-14Fe-0.1Ag and Cu-8Cr-0.1Ag. Before DCT, the electrical conductivities of Cu-14Fe and Cu-8Cr were lower than those of the Cu-14Fe-0.1Ag and Cu-8Cr-0.1Ag, respectively; whereas after DCT, the electrical conductivities of Cu-14Fe and Cu-8Cr were higher than those of the corresponding composites with 0.1%Ag micro-alloying. The possible mechanisms involved in the effects of DCT on the properties of composites were discussed in this paper

• Periodical: Advanced Materials Research (Volumes 452-453)
• Pages: 496-501
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.452-453.496
• Online since: January 2012
• Authors: Yan Ling Yang, Jin Geng Chen, Zhen Zhen Wan, Qiang Hu, Qing Feng Fu, Lin Ping Kang, Zhi Bao Chen, De Ping Lu
• Keywords: Conductivity, Cryogenic Treating, In Situ Composite, Strength

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