Effect of Rare Earth Y Addition on the Properties and Precipitation Morphology of Aged Cu-Cr-Ti Lead Frame Alloy

Xian Hui Wang; Yan Liang; Jun Tao Zou; Shu Hua Liang; Zhi Kang Fan

doi:10.4028/www.scientific.net/AMR.97-101.578

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 97-101Effect of Rare Earth Y Addition on the Properties...

Effect of Rare Earth Y Addition on the Properties and Precipitation Morphology of Aged Cu-Cr-Ti Lead Frame Alloy

Abstract:

The influence of rare earth Y addition and ageing treatment on the properties and precipitation morphology of Cu-Cr-Ti alloy was investigated. The results show that 0.1wt%Y addition increases the hardness, and decreases the electrical conductivity slightly. However, both the hardness and electrical conductivity decrease with an excessive Y addition. After ageing at 550°C for 2h, Cu-0.3Cr-0.2Ti-0.1Y alloy has a good combination of the hardness and electrical conductivity, which has the hardness of 134HV and the electrical conductivity of 73.9%IACS. After ageing treatment, most Cr rich phases precipitate in the form of sphere shape while a small amount of Cr rich phases exist in the form of acicular, and Y rich phases precipitate in the form of flake along the grain boundary.

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Periodical:

Advanced Materials Research (Volumes 97-101)

Pages:

578-581

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.97-101.578

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Online since:

March 2010

Authors:

Xian Hui Wang, Yan Liang, Jun Tao Zou, Shu Hua Liang, Zhi Kang Fan

Keywords:

Aging Treatment, Cu-Cr-Ti Alloy, Electrical Conductivity, Hardness, Rare Earth Y

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