Combined in situ neutron diffraction and acoustic emission of twin nucleation & twin growth in extruded ZM20 Mg alloy
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Date
2009-11-10
Journal Title
Journal ISSN
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Publisher
Trans Tech Publications
Abstract
In the present work in situ neutron diffraction and acoustic emission were used concurrently to study deformation twinning in two ZM20 Mg alloys with significantly different grain sizes at room temperature. The combination of these techniques allows differentionation between the twin nucleation and the twin growth mechanisms. It is shown, that yielding and immediate post-yielding plasticity in compression is governed primarily by twin nucleation, whereas the plasticity at higher strains is governed by twin growth. The current results further suggest that yielding by twinning happens in a slightly different manner in the fine-grained as compared to the coarse-grained alloy. © Trans Tech Publications Ltd
Description
Keywords
Nucleation, Neutron diffraction, Magnesium, Deformation, Twinning, Acoustic emission testing
Citation
Muransky, O., Barnett, M. R., Carr, D. G., Vogel, S. C., & Oliver, E. C. (2009). Combined in situ neutron diffraction and acoustic emission of twin nucleation & twin growth in extruded ZM20 Mg alloy. Paper presented to the 5th International Conference on Mechanical Stress Evaluation by Neutrons and Synchrotron Radiation (MECA SENS V) and 3rd International Symposium of Quantum Beam Science Directorate of Japan Atomic Energy Agency (QuBS2009), 10th – 12th November 2009. Hotel Lake View: Mito, Japan. In Akiniwa, Y. & Akita, K., et al. (Eds.), Materials Science Forum - "Mechanical Stress Evaluation by Neutrons and Synchrotron Radiation", 652, 149-154. doi:10.4028/www.scientific.net/MSF.652.149