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A comparative study on effects of special casting processes on microstructural development in Cu-10Al-4Fe-4Ni alloy

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Abstract

Suction casting (SC) and centrifugal casting (CC) are two common special casting processes. The influences of SC and CC on the microstructural development of Cu-10Al-4Fe-4Ni aluminum bronzes were investigated with continuous cooling method. The results indicate that α, β’, KII, and KIII phases are observed in the quasicast microstructure via the SC process with the precipitation sequence of KII → α → KIII. Additionally, KI and KIV are observed in the quasicast microstructure via the CC process with the precipitation sequence of α + KI → KII → KIV → KIII. Phase initial precipitation temperatures of the CC process are higher than that of the SC process, especially for a phase. As the quenching temperature decreases, the hardness of both alloys shows a rapid decline trend and finally reaches a steady state. It is found that the eutectoid decomposition (β → α + KIII) barely affects the hardness of the alloys.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Central South University, Changsha, 410083, China

    Gaoyong Lin, Yuxia Lei, Juhua Zeng, Han Li & Xiuzhi Xu

  2. Key Laboratory of Nonferrous Metal Materials Science and Engineering, Ministry of Education, Central South University, Changsha, 410083, China

    Gaoyong Lin

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  1. Gaoyong Lin
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  2. Yuxia Lei
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  3. Juhua Zeng
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Lin, G., Lei, Y., Zeng, J. et al. A comparative study on effects of special casting processes on microstructural development in Cu-10Al-4Fe-4Ni alloy. Journal of Materials Research 28, 2874–2880 (2013). https://doi.org/10.1557/jmr.2013.290

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