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Twinning and detwinning during compression–tension loading measured by quasi in situ electron backscatter diffraction tracing in Mg–3Al–Zn rolled sheet

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Abstract

Twinning and detwinning are the important deformation modes in magnesium alloys during cyclic loading at room temperature. To analyze these two deformation mechanism, cyclic compression–tension experiments were performed on Mg–3Al–1Zn rolled sheet along the rolling direction. In these tests, the microstructure evolutions of a series of grains during deformation were traced by using quasi in situ electron backscatter diffraction (EBSD). Important quantities like the Schmid factors of twinning system, the fraction of twinning during compression, and the fraction of twinning after reverse loading were calculated on the basis of measured quantities. The influence of Schmid factor of twinning variants on detwinning upon reverse loading was analyzed. Detwinning would prefer to proceed during reverse loading if the Schmid factor of twinning in the twinning area before reverse loading is sufficiently large.

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Acknowledgments

This work was financially supported by the National Natural Science Foundation of China (Nos. 50775211 and 51174189).

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Authors and Affiliations

  1. Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China

    Li Zheng, Shi-Hong Zhang, Hong-Wu Song & Neng-Yong Ye

  2. Material Shaping Researching Group, Fraunhofer Institute for Mechanics of Materials, 79108, Freiburg, Germany

    Dirk Helm

  3. School of Material Science and Engineering, Shenyang Aerospace University, Shenyang, 110036, China

    Hong-Wu Song & Guang-Sheng Song

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  1. Li Zheng
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  2. Shi-Hong Zhang
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  4. Hong-Wu Song
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  5. Guang-Sheng Song
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Correspondence to Shi-Hong Zhang.

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Zheng, L., Zhang, SH., Helm, D. et al. Twinning and detwinning during compression–tension loading measured by quasi in situ electron backscatter diffraction tracing in Mg–3Al–Zn rolled sheet. Rare Met. 34, 698–705 (2015). https://doi.org/10.1007/s12598-013-0209-8

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  • DOI: https://doi.org/10.1007/s12598-013-0209-8

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