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Microstructure and Properties of Cu–Ti Alloys Prepared by Aluminothermic Reaction and Subsequent Rolling

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Abstract

By studying the effect of preparation technology and plastic deformation on the microstructure and property evolution of Cu–Ti alloys with a larger composition range, its application scope can be further expanded. In present paper, Cu–Ti alloys with Ti content of 1.0, 4.5 and 10.0 wt % were prepared by aluminothermic reaction and their microstructures and properties were regulated by rolling deformation. The results show that Cu–1.0 wt % Ti alloy is in the solid solution state, Cu–4.5 wt % Ti alloy has a small number of punctate precipitates, and Cu–10.0 wt % Ti alloy has a large number of Cu4Ti precipitate distributed in a network at grain boundaries. For the as-cast Cu–Ti alloys, they consist of a large number of equiaxed micron crystals and a few nanocrystals. With the increase of Ti content, the relative density and grain size of the alloys decrease, the strength and hardness increase, but the elongation and electrical conductivity decrease. Compared with the as-cast alloys, the phase composition of the rolled alloy does not change, but the relative density increases, the grains are elongated along the deformation direction and some grains are crushed into nanocrystals. The precipitated phases are broken and the distribution in the matrix is more uniform and dispersed. For the rolled alloys with the same composition, with the increase of rolling deformation, the strength and hardness increase sharply, but the plasticity decreases significantly, and the electrical conductivity increases slightly at first and then decreases.

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Funding

We gratefully acknowledge the supports by the Science and Technology Plan of Gansu Province (grant nos. 18YF1WA069, 21ZD4GA029 and 20JR10RA201), the Key Research Program of Education Department of Gansu Province (grant no. GSSYLXM-03) and the fund of the State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals (grant no. SKLAB02019010).

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Authors and Affiliations

  1. State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, 730050, Lanzhou, China

    Yuehong Zheng, Sijia Zhu, Haoyang Gao, Peiqing La & Faqi Zhan

  2. School of Materials Science and Engineering, Lanzhou University of Technology, 730050, Lanzhou, China

    Jie Tang & Min Zhu

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  1. Yuehong Zheng
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Yuehong Zheng, Zhu, S., Gao, H. et al. Microstructure and Properties of Cu–Ti Alloys Prepared by Aluminothermic Reaction and Subsequent Rolling. Phys. Metals Metallogr. 124, 1555–1566 (2023). https://doi.org/10.1134/S0031918X2260155X

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