Grain Rotation during Twin-Detwin Deformation of Mg AZ31 Alloy Using In Situ XRD and EBSD


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To investigate grain rotation caused by twinning-detwinning during plastic deformation, experiments using synchrotron high energy X-ray Diffraction (XRD) and Electron Backscatter Diffraction (EBSD) are carried out under in situ compression-tension loading. Comparison between the XRD and EBSD data confirms that the intensity change of diffraction rings in XRD experiment is caused by twining and detwinning. A good agreement of twin fraction values obtained from XRD and EBSD is achieved. This demonstrates that the grains and texture are homogeneously distributed along the normal direction of the sample. In the meantime, it is observed that detwinning can only be activated in a large quantity when the loading reverses into tension from compression in the first loading stage.



Edited by:

Henry Hu and Gu Xu




H. J. Zhang et al., "Grain Rotation during Twin-Detwin Deformation of Mg AZ31 Alloy Using In Situ XRD and EBSD", Key Engineering Materials, Vol. 793, pp. 17-22, 2019

Online since:

January 2019




* - Corresponding Author

[1] Zhang, H., et al. Synchrotron X-ray Diffraction Analysis of Bending Strains in Magnesium Alloy AZ31B Processed by Severe Plastic Deformation. in Proceedings of the International MultiConference of Engineers and Computer Scientists. 2016. Hong Kong: Newswood Limited.

[2] Hou, J.T., et al. Wet Powder Metallurgy Process for Dispersing Carbon Nanotubes and Fabricating Magnesium Composite. in International Conference of Advanced Functional Materials 2018. Los Angeles, United States: Trans Tech Publ.

[3] Choi, S.-H., E. Shin, and B. Seong, Simulation of deformation twins and deformation texture in an AZ31 Mg alloy under uniaxial compression. Acta Materialia, 2007. 55(12): pp.4181-4192.


[4] Proust, G., et al., Modeling the effect of twinning and detwinning during strain-path changes of magnesium alloy AZ31. International Journal of Plasticity, 2009. 25(5): pp.861-880.


[5] Wu, L., et al., Twinning–detwinning behavior during the strain-controlled low-cycle fatigue testing of a wrought magnesium alloy, ZK60A. Acta Materialia, 2008. 56(4): pp.688-695.


[6] Wu, L., et al., Internal stress relaxation and load redistribution during the twinning–detwinning-dominated cyclic deformation of a wrought magnesium alloy, ZK60A. Acta Materialia, 2008. 56(14): pp.3699-3707.


[7] Fernández, A., et al., Continuum modeling of the response of a Mg alloy AZ31 rolled sheet during uniaxial deformation. International Journal of Plasticity, 2011. 27(11): pp.1739-1757.


[8] García-Grajales, J.A., et al., A new strain rate dependent continuum framework for Mg alloys. Computational Materials Science, 2016. 115: pp.41-50.


[9] Fernández, A., et al., Three-dimensional investigation of grain boundary–twin interactions in a Mg AZ31 alloy by electron backscatter diffraction and continuum modeling. Acta Materialia, 2013. 61(20): pp.7679-7692.


[10] Yang, P., et al., Experimental determination and theoretical prediction of twin orientations in magnesium alloy AZ31. Scripta Materialia, 2004. 50(8): pp.1163-1168.


[11] Godet, S., et al., Use of Schmid factors to select extension twin variants in extruded magnesium alloy tubes. Scripta Materialia, 2006. 55(11): pp.1055-1058.


[12] Jiang, L., et al., Twinning-induced softening in polycrystalline AM30 Mg alloy at moderate temperatures. Scripta Materialia, 2006. 54(5): pp.771-775.


[13] Keshavarz, Z. and M.R. Barnett, EBSD analysis of deformation modes in Mg–3Al–1Zn. Scripta Materialia, 2006. 55(10): pp.915-918.