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Combined in situ neutron diffraction and acoustic emission of twin nucleation & twin growth in extruded ZM20 Mg alloy

journal contribution
posted on 2010-05-20, 00:00 authored by O Muránsky, Matthew BarnettMatthew Barnett, D Carr, S Vogel, E Oliver
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.

History

Journal

Materials science forum

Volume

652

Pagination

149 - 154

Publisher

Trans Tech Publications

Location

Stafa-Zurich, Switzerland

ISSN

0255-5476

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2010, Trans Tech Publications