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Refining performance of Al–3Ti–0.2C–5Sr on A356 alloy and electron microanalysis of ternary Al–Ti–Sr phases

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Abstract

The effect of Al–3Ti–0.2C–5Sr (wt%) grain refiner on the refining performance and modification of A356 alloy was investigated using optical microscope (OM). The morphology and crystal structure of ternary Al–Ti–Sr phases in Al–3Ti–0.2C–5Sr refiner were analyzed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results show that the ternary Al–Ti–Sr phases in Al–3Ti–0.2C–5Sr refiner can promote the grain refining efficiency of A356 alloy. The ternary Al–Ti–Sr phases co-exist in two morphologies, i.e., blocky-like phase and surround-like phase, besides, which both have the same chemical composition of Al34Ti3Sr. The crystal structure of Al34Ti3Sr is face-centered cubic, and the lattice parameter is determined to be about 1.52 nm.

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Acknowledgments

This study was financially supported by the National Natural Science Foundation of China (No. 51174177).

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Authors and Affiliations

  1. College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450002, China

    Hong-Liang Zhao, Ya Gao & Qi-Yan Sun

  2. Department of Mechanical and Electrical Engineering, Xuchang Vocational Technical College, Xuchang, 461000, China

    Chuan-Bin Zhang

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  1. Hong-Liang Zhao
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  2. Chuan-Bin Zhang
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Correspondence to Hong-Liang Zhao.

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Zhao, HL., Zhang, CB., Gao, Y. et al. Refining performance of Al–3Ti–0.2C–5Sr on A356 alloy and electron microanalysis of ternary Al–Ti–Sr phases. Rare Met. 36, 188–192 (2017). https://doi.org/10.1007/s12598-014-0246-y

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  • DOI: https://doi.org/10.1007/s12598-014-0246-y

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