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Rapid dendritic growth and solute trapping within undercooled ternary Ni-5%Cu-5%Mo alloy

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Abstract

The dendritic growth velocity of α-Ni phase was measured as a function of undercooling in the nonequilibrium solidification process of an undercooled ternary Ni-5%Cu-5%Mo alloy. At the experimental maximum undercooling of 308 K (0.17T L), the dendritic growth velocity attains 32 m/s. With the increase of undercooling, a morphological transition from dendrites into equiaxed grains occurs. Furthermore, the high dendritic growth velocity leads to the significant solute trapping of Cu and Mo elements and almost segregationless solidification is realized at the maximum undercooling.

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Acknowledgement

The authors are grateful to Drs. F.P. Dai, W.L. Wang, and Y. Ruan for their help in the experiments and analysis. This research was supported by National Science Foundation of China under Grants Nos. 50971103 and 50971105.

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  1. Department of Applied Physics, Northwestern Polytechnical University, Xi’an, 710072, China

    J. Chang, H. P. Wang, K. Zhou & B. Wei

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  1. J. Chang
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  2. H. P. Wang
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  3. K. Zhou
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  4. B. Wei
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Correspondence to B. Wei.

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Chang, J., Wang, H.P., Zhou, K. et al. Rapid dendritic growth and solute trapping within undercooled ternary Ni-5%Cu-5%Mo alloy. Appl. Phys. A 109, 139–143 (2012). https://doi.org/10.1007/s00339-012-7017-0

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  • DOI: https://doi.org/10.1007/s00339-012-7017-0

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