ACTA

Acoustic Emission Study of the Deformation Behavior of Mg-Mn Alloys Containing Rare Earth Elements

K. Illkova^a, P. Dobroň^a, F. Chmelík^a, D. Letzig^b and J. Bohlen^b
^aDepartment of Physics of Materials, Charles University Prague, Ke Karlovu 5, 12116, Prague 2, Czech Republic
^bHelmholtz-Zentrum Geesthacht, Zentrum für Material- und Küstenforschung GmbH, Max-Planck-Str. 1, D21502 Geesthacht, Germany

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Magnesium-manganese (Mg-Mn) based alloys with various chemical composition were processed by indirect extrusion at two different speeds. Alloying with Mn and rare- earth elements has significant influence on the microstructure and on the texture of the alloys under investigation. This paper deals with the acoustic emission analysis of the deformation behavior of the extruded Mg-Mn alloys. The acoustic emission measurements were performed during the uniaxial tension and compression tests, and the obtained results are discussed with respect to the influence of rare-earth elements on the deformation behavior, particularly in terms of the activation of dislocation glide and twinning.

DOI: 10.12693/APhysPolA.122.634
PACS numbers: 81.05.Bx, 81.20.Hy, 83.50.Uv, 81.40.Ef, 83.50.-v, 43.40.Le