Abstract
Grain size effects on three generations of twins were investigated in extruded Mg-4 wt pct Li (-1 wt pct Al) alloys using electron-backscatter diffraction. Samples with three distinct grains sizes, yet the same texture and applied strain were analyzed. With these variables fixed, we show that compression and double twinning decrease substantially with decreasing grain size. We find that compression twinning exhibits a stronger grain size effect than tension twinning, whereas the compression twinning to double twinning transition is independent of grain size.
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The authors are grateful for the financial support of the Deutsche Forschungsgemeinschaft (DFG) under the contract number RE 688/67-1. IJ Beyerlein would like to acknowledge support by a Laboratory Directed Research and Development program Award Number 20140348ER.
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Lentz, M., Behringer, A., Fahrenson, C. et al. Grain Size Effects on Primary, Secondary, and Tertiary Twin Development in Mg-4 wt pct Li (-1 wt pct Al) Alloys. Metall Mater Trans A 45, 4737–4741 (2014). https://doi.org/10.1007/s11661-014-2491-y
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DOI: https://doi.org/10.1007/s11661-014-2491-y