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Effects of Forming Specific Pressure and Filling Speed on Microstructure and Mechanical Properties of Thin-Walled CuSn10P1 Alloy Parts by Rheological Squeeze Forming

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Abstract

Semi-solid rheological squeeze forming has distinct advantages over traditional casting and forming techniques. In this study, a high-performance thin-walled CuSn10P1 alloy was successfully produced by combining liquid-metal instantaneous undercooling-induced nucleation, semi-solid slurry homogenization treatment, and semi-solid rheological squeeze forming. The effects of the forming specific pressure (MPa) and filling speed (mm/s) on the microstructure and mechanical properties of these parts were explored in this study, and the influence of the intergranular brittle phase (α-Cu + δ-Cu41Sn11 + Cu3P) content on the mechanical characteristics was determined. CuSn10P1 alloy with a Cu13.7Sn phase exhibiting a large number of spherical or nearly spherical morphological features coexisting with the high-tin solid-solution layer morphology was discovered and prepared at a mold temperature of 485 °C, specific pressure of 165 MPa, and filling speed of 22 mm/s. Parts with this microstructure had excellent mechanical properties, including an ultimate tensile strength of 419.95 MPa, yield strength of 228.89 MPa, and an elongation of 13.71%. This study illustrates the viability of semi-solid rheological squeeze casting for manufacturing high-performance thin-walled high-tin copper alloys.

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Funding

This research was supported by the Natural Science Foundation of China (Grant No. 51765026) and Analysis and Testing Fund of Kunming University of Science and Technology (Grant No. 2021P20201130019)

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Authors and Affiliations

  1. Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, People’s Republic of China

    Wentao Xiong, Rongfeng Zhou, Zhangxing Liu, Ke Wen, Xinhua Yin & Yongkun Li

  2. City College, Kunming University of Science and Technology, Kunming, 650051, People’s Republic of China

    Rongfeng Zhou & Yongkun Li

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  1. Wentao Xiong
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Xiong, W., Zhou, R., Liu, Z. et al. Effects of Forming Specific Pressure and Filling Speed on Microstructure and Mechanical Properties of Thin-Walled CuSn10P1 Alloy Parts by Rheological Squeeze Forming. Inter Metalcast 18, 1438–1454 (2024). https://doi.org/10.1007/s40962-023-01109-3

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