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Identification of Secondary Dislocations by Singular Value Decomposition of the Nye Tensor

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Acta Metallurgica Sinica (English Letters) Aims and scope

Abstract

Recently, we proposed the use of singular values and singular vectors of the Nye tensor to specify the features of dislocations. To further validate the method in identifying dislocations, the algorithm is applied to detect secondary dislocations in this paper. Different from the perfect and partial dislocations where the reference state is a single crystal, the reference state for detecting secondary dislocations should be a bi-crystal in a coincident coherent state. It is demonstrated that the secondary dislocations in an interface can be correctly identified when the reference state is appropriately selected.

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Acknowledgments

This work was financially supported by the National Natural Science Foundation of China (No. 51171088).

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Authors and Affiliations

  1. Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China

    Fuzhi Dai & Wenzheng Zhang

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  1. Fuzhi Dai
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  2. Wenzheng Zhang
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Correspondence to Wenzheng Zhang.

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Dai, F., Zhang, W. Identification of Secondary Dislocations by Singular Value Decomposition of the Nye Tensor. Acta Metall. Sin. (Engl. Lett.) 27, 1078–1082 (2014). https://doi.org/10.1007/s40195-014-0123-6

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  • DOI: https://doi.org/10.1007/s40195-014-0123-6

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