The composite researchers are paying more attention to in situ reacted composites owing to their achievements, such as simpler fabrication process, lower cost of fabrication, and more excellent and controllable mechan...The composite researchers are paying more attention to in situ reacted composites owing to their achievements, such as simpler fabrication process, lower cost of fabrication, and more excellent and controllable mechanical properties. Recently, in situ MMCs studies are concentrated on making full use of dispersion strengthening of in展开更多
AA6061-10 vol.% SiC composite was successfully prepared by spark plasma sintering. The deformation behaviour of this composite was studied using the uniaxial compression test, which was conducted at temperatures betwe...AA6061-10 vol.% SiC composite was successfully prepared by spark plasma sintering. The deformation behaviour of this composite was studied using the uniaxial compression test, which was conducted at temperatures between 300 and 500℃ and strain rates between 0.001 and 1 s^-1. Results indicate that the stress-strain curves of the AA6061-10 vol.% SiC composite typically feature dynamic recrystallization. The steady stress can be described by a hyperbolic sine constitutive equation, and the activation energy of the composite is 230.88 kJ/mol. The processing map was established according to the dynamic materials model. The optimum hot deformation temperature is 450-500℃ and the strain rate is 1-0.1 s^-1. The instability zones of flow behaviour can also be identified using the processing map.展开更多
基金State Key Laboratory of Metal Matrix Composites of shanghai Jiaotong University Laboratory of Solid State Microstructures of Nanjing University.
文摘The composite researchers are paying more attention to in situ reacted composites owing to their achievements, such as simpler fabrication process, lower cost of fabrication, and more excellent and controllable mechanical properties. Recently, in situ MMCs studies are concentrated on making full use of dispersion strengthening of in
基金supported by the National Basic Research Program of China(“973”Project)(Grant No.2013CB733000)
文摘AA6061-10 vol.% SiC composite was successfully prepared by spark plasma sintering. The deformation behaviour of this composite was studied using the uniaxial compression test, which was conducted at temperatures between 300 and 500℃ and strain rates between 0.001 and 1 s^-1. Results indicate that the stress-strain curves of the AA6061-10 vol.% SiC composite typically feature dynamic recrystallization. The steady stress can be described by a hyperbolic sine constitutive equation, and the activation energy of the composite is 230.88 kJ/mol. The processing map was established according to the dynamic materials model. The optimum hot deformation temperature is 450-500℃ and the strain rate is 1-0.1 s^-1. The instability zones of flow behaviour can also be identified using the processing map.
