Assuntos
Carcinoma Neuroendócrino , Carcinoma de Células Pequenas , Carcinoma de Células de Transição , Neoplasias Renais , Ureter , Sistema Urinário , Humanos , Carcinoma de Células Pequenas/cirurgia , Carcinoma de Células Pequenas/patologia , Sistema Urinário/patologia , Carcinoma Neuroendócrino/tratamento farmacológico , Carcinoma Neuroendócrino/cirurgia , Carcinoma Neuroendócrino/patologia , Neoplasias Renais/patologia , Carcinoma de Células de Transição/patologia , Ureter/patologiaRESUMO
Precipitates and their associated strain fields significantly influence mechanical properties and, consequently, the industrial performance of aluminum alloys. In this work, we present a direct measurement of strains induced by η' and η precipitates in an Al-Zn-Mg-Cu alloy using aberration-corrected high-resolution transmission electron microscopy and quantitative strain analysis. The results demonstrate that the strain induced by precipitates in the Al-Zn-Mg-Cu alloy shows significant tensile strains perpendicular to the longitudinal direction of the precipitate discs on the side of the discs and along the longitudinal direction at both ends of the η' and η precipitates. This strain field can be described by an equivalent dislocation model, in which the lattice mismatch between the precipitate and the matrix is equivalent to a series of dislocation pairs along the precipitate/matrix interfaces.