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Microstructure evolution of large-scale titanium slab ingot based on CAFE method during EBCHM

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Abstract

The purpose of this work is, based on CAFE method, to study the microstructure evolution and optimize the quality of the large-scale titanium slab ingot during EBCHM. The nucleation parameters of the microstructure simulation of titanium ingot are determined based on one of the actual experimental results. For the determined parameters, our theoretical results are agreement with other experimental results. The effects of pouring temperature and pulling speed on the microstructure are presented based on CAFE method. The quantitative analyses of the simulated results show that with the pulling speed increasing, the number of grains decreases, whereas the mean grain radius increases under identical thermal condition; with the pouring temperature increasing, the mean grain radius increases under the given pulling speed. Our results are very important to obtain the optimal structure of the ingots by controlling pulling speed and pouring temperature.

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Abbreviations

1:

Electron beam cold hearth melting (EBCHM)

2:

Vacuum arc remelting (VAR)

3:

Monte Carlo method (MC)

4:

Finite element coupling the cellular automaton method (CAFE)

5:

Kurz, Giovanola, and Trivediand model (KGT)

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ACKNOWLEDGMENTS

This work is supported By Applied Basic Research Program of Yunnan Province (No. 2013FC001), Science and Technology Project of Yunnan Province (No. 2016FB089), and Startup Foundation for Advanced Talents of Kunming University of Science and Technology (No. KKSY201551034).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China

    Qian-Li Liu, Xiang-Ming Li & Ye-Hua Jiang

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  1. Qian-Li Liu
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  2. Xiang-Ming Li
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Correspondence to Xiang-Ming Li.

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Liu, QL., Li, XM. & Jiang, YH. Microstructure evolution of large-scale titanium slab ingot based on CAFE method during EBCHM. Journal of Materials Research 32, 3175–3182 (2017). https://doi.org/10.1557/jmr.2017.174

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