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Twinning Behaviour in the Intermetallic Compound Al18Cr2Mg3

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Acta Metallurgica Sinica (English Letters) Aims and scope

Abstract

The twinning in the intermetallic compound Al18Cr2Mg3 was observed and identified by transmission electron microscopy. The geometric description of the twinning in Al18Cr2Mg3 with 184 atoms per unit cell was investigated at atomic level. The classical theory of deformation twinning states that the net atomic displacements are divided into shear and shuffles during twinning. Based on the theory and the hypothesis of full mirror reflection symmetry, the displacement and angle of shuffle were calculated for each atom. The geometric calculation results show that all of the atoms in single crystal Al18Cr2Mg3 have to shuffle. Moreover, the calculation results can be divided into 22 groups, which do not show obvious regularity.

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Acknowledgments

The work was financially supported by the 111 Project (No. B08040) of China and National Natural Science Foundation of China (No. 51071125).

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Authors and Affiliations

  1. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an, 710072, China

    Maohua Li, Yanqing Yang, Ming Han, Wei Zhang, Bin Huang & Xian Luo

  2. Beijing Institute of Aeronautical Materials, Beijing, 100095, China

    Jigang Ru

Authors
  1. Maohua Li
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  2. Yanqing Yang
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  3. Ming Han
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  4. Wei Zhang
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  5. Bin Huang
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  6. Xian Luo
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  7. Jigang Ru
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Correspondence to Maohua Li.

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Li, M., Yang, Y., Han, M. et al. Twinning Behaviour in the Intermetallic Compound Al18Cr2Mg3 . Acta Metall. Sin. (Engl. Lett.) 27, 677–681 (2014). https://doi.org/10.1007/s40195-014-0092-9

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  • DOI: https://doi.org/10.1007/s40195-014-0092-9

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