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Evolution of microstructure and mechanical properties in Zn–Cu–Ti alloy during severe hot rolling at 300 °C

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Abstract

The present investigation aims to explore the evolution of microstructure and mechanical properties in Zn–Cu–Ti alloys during severe hot-rolling deformation. Twin deformation and dynamic recrystallisation are two important deformation modes of Zn–Cu–Ti alloys during hot rolling at 300 °C. Twin deformation and dynamic recrystallisation (DRX) appear one after the other. They not only consume the deformation stored energy but also inhibit initiation and growth of cracks. The elongation rate of Zn–Cu–Ti alloys has a rising trend with the increase in hot-rolling deformation. It is mainly due to grain refinement caused by increasing the ratio of DRX and twin deformation. The tensile strength of Zn–Cu–Ti alloys is found to decrease with the increase in hot-rolling deformation. This is because the solid-solution strengthening effect of copper is weakened by more deformation-induced precipitation of ε phase (CuZn5). The solid-solution strengthening effect of copper plays an important role in the strengthening effect of Zn–Cu–Ti alloys.

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ACKNOWLEDGMENTS

This work was supported by the following projects: State Key Program of National Natural Science Foundation of China (No. U1502274), Innovation Scientists and Technicians Troop Construction Projects of Henan Province (No. C20150014), Program for Innovation Research Team (in Science and Technology) in Universities of Henan Province (No. 14IRTSTHN007) and Key Scientific Program of Henan Province (No. 16A430004). We are indebted to the anonymous reviewers for their valuable comments and suggestions.

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Authors and Affiliations

  1. Faculty of Materials Science and Engineering, Xi’an University of Technology, Xi’an, 710048, China

    Shengya Ji & Shuhua Liang

  2. School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang, 471023, China

    Shengya Ji, Kexing Song & Hongxia Li

  3. Department of Materials Engineering, Henan Institute of Technology, Xinxiang, 453003, China

    Shengya Ji

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

    Zhou Li

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  1. Shengya Ji
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  2. Shuhua Liang
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  4. Hongxia Li
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Correspondence to Kexing Song.

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Ji, S., Liang, S., Song, K. et al. Evolution of microstructure and mechanical properties in Zn–Cu–Ti alloy during severe hot rolling at 300 °C. Journal of Materials Research 32, 3146–3155 (2017). https://doi.org/10.1557/jmr.2017.275

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  • DOI: https://doi.org/10.1557/jmr.2017.275

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