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Transition of solidification path in nonequilibrium solidification of Ti–48Al–8Nb alloy

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Abstract

The solidification behavior of Ti–48Al–8Nb alloy under nonequilibrium solidification conditions was studied by electromagnetic levitation technique. The solidification conditions are different undercooling (ΔT) under the same cooling condition and different cooling methods at the same undercooling condition, respectively. In different undercooling conditions, when the undercooling is above a critical value (ΔT* ≈ 211 K), a remarkable morphological transition from typical hypoperitectic solidification to a sole solidification of the β phase resulting in the suppression of the peritectic reaction occurs. For melts with different cooling conditions at the same undercooling (ΔT ≈ 85 K), the melt was rapidly cooled by quenching them in cooling media. With cooling rate increasing, a transition from β phase to peritectic α phase solidification mode is revealed for Ti–48Al–8Nb alloy.

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Acknowledgments

This research was financially supported by the National Basic Research Program of China (No. 2011CB605503) and the 111 Project of Northwestern Polytechnical University (No. B08040).

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Authors and Affiliations

  1. The State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an, 710072, China

    Tan He, Rui Hu, Jie-Ren Yang, Tie-Bang Zhang & Jin-Shan Li

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  1. Tan He
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  2. Rui Hu
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  5. Jin-Shan Li
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Correspondence to Rui Hu.

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He, T., Hu, R., Yang, JR. et al. Transition of solidification path in nonequilibrium solidification of Ti–48Al–8Nb alloy. Rare Met. 35, 48–53 (2016). https://doi.org/10.1007/s12598-015-0630-2

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  • DOI: https://doi.org/10.1007/s12598-015-0630-2

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