Effect of Loading Mode on the Evolution of the Dislocation Structure in Magnesium
K. Máthisa, J. Gubicza b, G. Csiszár b, J. Čapek a, B. Clausen c, V. Šíma a and P. Lukáš d
aDepartment of Physics of Materials, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 5, 121 16 Prague, Czech Republic
bDepartment of Materials Physics, Faculty of Science, Eötvös Loránd University, Pázmány P. sétány 1/A, H-1117 Budapest, Hungary
cLos Alamos National Laboratory, Lujan Neutron Scattering Center, Los Alamos, NM 87545, USA
dNuclear Physics Institute of the Academy of Sciences of the Czech Republic, 250 68 Řež, Czech Republic
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The evolution of the dislocation structure in randomly textured cast magnesium as a function of loading mode is studied using whole neutron diffraction pattern line profile analysis and elasto-plastic self-consistent modeling. Both the experimental results and the theoretical data indicate the onset of basal slip at low stresses and the key role of prismatic slip in the macroscopic yield. Dependence of the second-order pyramidal slip on the loading mode is revealed.

DOI: 10.12693/APhysPolA.128.700
PACS numbers: 81.05.Bx, 83.85.Hf, 83.60.La, 81.40.Lm