The results of x-ray diffraction data of a polycrystal under nonhydrostatic compression are analyzed for lattice preferred orientation and stress using lattice strain theories with an application to hcp-Co deformed up to in the diamond anvil cell. We obtain a pure  fiber texture that develops primarily between 0 and . We also show that for hcp metals the hypothesis of uniform stress across grains and lattice planes cannot be applied. This implies that the effective single crystal elastic moduli deduced from x-ray diffraction under Reuss or geometric averages consistently differ from those measured with other techniques, even after including effects of lattice preferred orientations. These results can be interpreted as an -dependent effective differential stress resulting from plastic deformation.
Lattice preferred orientation and stress in polycrystalline hcp-Co plastically deformed under high pressure
Present address: Laboratoire de Structure et Propriétés de l’Etat Solide, UMR CNRS 8008, Université des Sciences et Technologies de Lille, 59655 Villeneuve d’Ascq, France; electronic mail: email@example.com
Sébastien Merkel, Nobuyoshi Miyajima, Daniele Antonangeli, Guillaume Fiquet, Takehiko Yagi; Lattice preferred orientation and stress in polycrystalline hcp-Co plastically deformed under high pressure. J. Appl. Phys. 15 July 2006; 100 (2): 023510. https://doi.org/10.1063/1.2214224
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