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Quasi in situ observation of twinning evolution during strain path change in magnesium alloy

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Abstract

Tensile twinning plays an important role in the magnesium alloys. In this work, the microstructures and the twinning behaviors in a rolled AZ31 magnesium alloy have been investigated during strain path change using quasi in situ electron-backscattered diffraction method. The results show that detwinning can only occur in grains with certain orientations and is not prevalent in this case. Under compressive strain along the rolling direction, single twin variant with the highest Schmid factor value can be activated, while under re-compressive strain along the transverse direction, several more types of twin variants can be activated. The activation of \(\left\{ {10\bar{1}2} \right\} - \left\{ {10\bar{1}2} \right\}\) double twin has also been observed during strain path change. The double twin activation confirms that one twin variant cannot transmit through another twin variant, but forms an “apparent crossing” twin structure.

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The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.

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Acknowledgments

This work was supported by the Office of China Postdoctoral Council under Award No. YJ20200248, the Beijing Municipal Natural Science Foundation (No. 2214072), and the Interdisciplinary Research Project for Young Teachers of USTB (Fundamental Research Funds for the Central Universities) (FRF-IDRY-20-034).

Funding

Funding was provided by Office of China Postdoctoral Council (YJ20200248), Beijing Municipal Natural Science Foundation (No. 2214072), Interdisciplinary Research Project for Young Teachers of USTB (FRF-IDRY-20-034).

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Authors and Affiliations

  1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China

    Yuzhi Zhu, Kaixuan Chen, Yanlin Wang & Zidong Wang

  2. State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing, 100083, China

    Xiaohua Chen

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  1. Yuzhi Zhu
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  2. Xiaohua Chen
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  4. Yanlin Wang
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Correspondence to Zidong Wang.

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Zhu, Y., Chen, X., Chen, K. et al. Quasi in situ observation of twinning evolution during strain path change in magnesium alloy. Journal of Materials Research 37, 1125–1132 (2022). https://doi.org/10.1557/s43578-022-00507-3

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