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Analysis on Dissociation of Pyramidal I Dislocation in Magnesium by Generalized-Stacking-Fault Energy

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Acta Metallurgica Sinica (English Letters) Aims and scope

Abstract

The generalized-stacking-fault energies are calculated to illustrate the dissociation of 〈c + a〉 dislocation on pyramidal I plane in magnesium. The γ surfaces of \( \{ 10\bar{1}1\} \) plane and its adjacent planes \( \{ 30\bar{3}4\} \) and \( \{ 30\bar{3}2\} \) are presented using Liu embedded-atom-method potential method, and one possible dissociation path of \( 1/3\langle {11\bar{2}3} \rangle \) dislocation on \( \{ 10\bar{1}1\} \) plane with minimum energy is predicted. Meanwhile, another two reasonable dissociation paths of \( 1/3\langle {11\bar{2}3} \rangle \) dislocation successively on \( \{ 30\bar{3}4\} \) and \( \{ 30\bar{3}2\} \) planes are also proposed. Moreover, based on molecular dynamics simulations of magnesium single crystals under c-axis compression, the possible slip path is further examined and discussed.

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Acknowledgments

This work was supported by the Fundamental Research Funds for the Central Universities of China (No. 2014YJS092) and the National Natural Science Foundation of China (No. 11372032).

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Authors and Affiliations

  1. Institute of Engineering Mechanics, Beijing Jiaotong University, Beijing, 100044, China

    Qun Zu, Ya-Fang Guo & Xiao-Zhi Tang

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  1. Qun Zu
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  2. Ya-Fang Guo
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  3. Xiao-Zhi Tang
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Correspondence to Ya-Fang Guo.

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Zu, Q., Guo, YF. & Tang, XZ. Analysis on Dissociation of Pyramidal I Dislocation in Magnesium by Generalized-Stacking-Fault Energy. Acta Metall. Sin. (Engl. Lett.) 28, 876–882 (2015). https://doi.org/10.1007/s40195-015-0271-3

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