Effect of Alterative and Homogenization on the Microstructure of Cu-20Ni-5Sn Alloy

Abstract:

The serious dendritic segregation occurs in Cu-20Ni-5Sn alloy. The microstructure of Cu-20Ni-5Sn alloy as-cast is composed of white light dendrite (Cu-Ni solid solution), Sn-rich solid solution (Cu₂Ni₃Sn₃ phase) and block light precipitation (Ni₁₇Sn₃ phase). The microstructure of Cu-20Ni-5Sn alloy affected by alterative and homogenization temperature was studied. The results show that the alterative can refine the microstructures of the Cu-20Ni-5Sn alloy and reduce the segregation of Sn. The grains are quite fine with 0.9%Wt alterative in the alloy. The homogenization temperature of the Cu-20Ni-5Sn alloy decreases with increase of alterative content in the alloy. Grains enlarged with the increase of homogenization temperature, and the secondary phase distributes became more evenly. The optimization condition of homogenization treatment is at 800 in 24h.

• Periodical: Materials Science Forum (Volume 749)
• Pages: 421-424
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.749.421
• Online since: March 2013
• Authors: Wei Cai, Sheng Li Yang, Liang Chen, Meng Meng Lu, Yu Min Liao
• Keywords: Alterative, Cu-20Ni-5Sn Alloy, Dendritic Segregation, Homogenization

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