J. Phys. Chem. Solids, 67, pp. 2119-2131, (2006) [doi: 10.1016/j.jpcs.2006.05.025]
Effect of lattice preferred orientation on lattice strains in polycrystalline materials deformed under high pressure: Application to hcp-Co
S. Merkel and T. Yagi
The present paper readdresses the issue of stress and strain analysis for hcp-metals plastically deformed under high pressure in the diamond anvil cell with an application to cobalt at 42 GPa. The effective single crystal elastic moduli deduced from radial X-ray diffraction under Reuss or geometric averages, including effects of lattice preferred orientations, and assuming a constant stress within the sample, consistently differ from those measured with other technique with the largest deviations observed on C44. These results are then interpreted as an (hkl)-dependent effective differential stress.
Le texte complet de cet article est disponible en ligne.