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The Effects of Al-5Ti-1B and Sr Interaction on Microstructure and Properties of ZL101

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Abstract

The effects of Al-5Ti-1B and Sr on the microstructure and properties of ZL101 alloy were studied, and the degree of eutectic Si modification was evaluated by solidification behavior. The results show that Al-5Ti-1B has a great effect on the refinement of primary α-Al dendrites, Sr has a great effect on the modification of eutectic Si, Al-5Ti-1B and Sr have a significant effect on the refinement of α-Al, and most of the eutectic Si is transformed from coarse lamellar to fine fibrous, but an incompletely modified region appears. Thermal analysis shows that the degree of undercooling in the primary α-Al and the nucleation rate is increased by the combined addition of Al-5Ti-1B and Sr, the effect of grain refinement is good, and the growth temperature of eutectic Si in the precipitation stage increases, and the metamorphic effect decreases slightly. More importantly, compared with the unmodified alloy, the alloy with Al-5Ti-1B and Sr addition combined increased the hardness by 9.8% and the electrical conductivity by 8.9%. The influence mechanism of the interaction between Al-5Ti-1B and Sr on the microstructure and properties of the alloy is discussed.

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Acknowledgments

The authors would like to thank the National Key Research and Development Program of China (No. 2022YFB3504401), Fundamental Research Funds for the National Natural Science Foundation of China (52271094, U1708251) and the Key Research and Development Program of Liaoning, China (2020JH2/10700003).

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Authors and Affiliations

  1. Key Lab of Electromagnetic Processing of Materials Ministry of Education, Northeastern University, Shenyang, 110819, People’s Republic of China

    Xiangjie Wang, Chengcheng Chen, Lingfei Yang, Fang Yu, Pengwei Li, Qiang Yan & Jianzhong Cui

  2. Advanced Manufacturing Technology and Engineering Research Centers, Northeastern University, Shenyang, 110819, People’s Republic of China

    Xiangjie Wang, Chengcheng Chen, Lingfei Yang, Fang Yu, Pengwei Li, Qiang Yan & Jianzhong Cui

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  1. Xiangjie Wang
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Wang, X., Chen, C., Yang, L. et al. The Effects of Al-5Ti-1B and Sr Interaction on Microstructure and Properties of ZL101. J. of Materi Eng and Perform 33, 2093–2103 (2024). https://doi.org/10.1007/s11665-023-08116-9

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