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Effect of local twin Schmid factor on the tension twinning activities in a highly textured Mg–3Al–1Zn alloy under different strain paths

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Abstract

We investigated the effect of the local twin Schmid factor (SF) on the tension twinning of individual grains in deformed textured Mg–3Al–1Zn samples under various strain paths. Statistical analyses on the electron backscatter diffraction results revealed tension twinning generally obeys the Schmid law for individual grains, regardless of whether the global stress state favors tension twinning or not. The strong dependence of tension twinning on the SF contrasts with the reported weak correlation of 〈c + a〉 dislocations and SF in the same material system. The different responses of 〈c + a〉 dislocations and tension twins to the local SF are discussed.

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Acknowledgments

The authors would like to acknowledge the funding support from the National Science Foundation (NSF-DMR, Grant Number: 1709865, Program Manager: Gary Shiflet) for the financial support for this research. The authors would like to acknowledge the instrument and technical support from the Microscopy & Imaging Center and the Materials Characterization Facility at Texas A&M University.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Texas A&M University, College Station, TX, 77843, USA

    Dexin Zhao, Jiaqi Dong & Kelvin Y. Xie

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  1. Dexin Zhao
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  2. Jiaqi Dong
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  3. Kelvin Y. Xie
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Correspondence to Kelvin Y. Xie.

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The authors declared that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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Zhao, D., Dong, J. & Xie, K.Y. Effect of local twin Schmid factor on the tension twinning activities in a highly textured Mg–3Al–1Zn alloy under different strain paths. MRS Communications 12, 217–222 (2022). https://doi.org/10.1557/s43579-022-00165-w

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