Evolutions of the Micro- and Macrostructure and Tensile Property of Cu-15Ni-8Sn Alloy During Electromagnetic Stirring-Assisted Horizontal Continuous Casting

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Abstract

The present study investigates the evolution of the micro- and macrostructure and tensile property of the Cu-15Ni-8Sn (weight percent) alloy prepared by horizontal continuous casting and electromagnetic stirring (EMS). The results show that the application of EMS is beneficial for grain refinement and for microstructure transformation from the dendrite to the rosette structure and that it leads to a significant improvement in the tensile property. The forced flow induced by EMS homogenizes the temperature field ahead of the solid-liquid interface, disturbing the heat flow direction and resulting in the columnar to equiaxed transition. The grain refinement under different electromagnetic stirring frequencies is mainly derived from the homogenization of the temperature and the remelting of dendritic arms. In addition, the evolution of the tensile property with and without EMS is discussed from the perspective of fracture mode and fine-grain strengthening.

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Acknowledgments

The authors gratefully acknowledge the financial support of the National Key Research and Development Program of China (Grant Nos. 2016YFB0301401 and 2016YFB0300401), the National Natural Science Foundation of China (Grant Nos. U1860202, U1732276, 50134010, and 51704193), and the Science and Technology Commission of Shanghai Municipality (Grant Nos. 13JC14025000 and 15520711000).

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Correspondence to Yunbo Zhong or Tianxiang Zheng.

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Manuscript submitted April 5, 2019.

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Shen, Z., Zhou, B., Zhong, J. et al. Evolutions of the Micro- and Macrostructure and Tensile Property of Cu-15Ni-8Sn Alloy During Electromagnetic Stirring-Assisted Horizontal Continuous Casting. Metall Mater Trans B 50, 2111–2120 (2019). https://doi.org/10.1007/s11663-019-01664-3

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