X-ray strain analysis at high pressure: Effect of plastic deformation in MgO
Article
Li, L, Weidner, DJ, Chen, J et al. (2004). X-ray strain analysis at high pressure: Effect of plastic deformation in MgO
. JOURNAL OF APPLIED PHYSICS, 95(12), 8357-8365. 10.1063/1.1738532
Li, L, Weidner, DJ, Chen, J et al. (2004). X-ray strain analysis at high pressure: Effect of plastic deformation in MgO
. JOURNAL OF APPLIED PHYSICS, 95(12), 8357-8365. 10.1063/1.1738532
A self-consistent model was used to predict the flow stress during the plastic deformation of polycrystalline MgO. Uniaxial deformation experiments on polycrystalline and single crystal MgO samples were conducted in situ using white x-ray diffraction with a multielement detector and multianvil high-pressure apparatus. The correlation of the data and models suggests that the plastic models need to be used to describe the stress-strain observations with the presence of plasticity. It was also suggested that Reuss and Voigt models are appropriate for the elastic region of deformation, before the onset of plastic deformation.
