期刊
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
卷 59, 期 6, 页码 980-988出版社
SCIENCE PRESS
DOI: 10.1007/s11431-016-6063-9
关键词
Al matrix composite; hot deformation; processing map; stress-strain curves; spark plasma sintering
资金
- National Basic Research Program of China (973 Project) [2013CB733000]
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 degrees C 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 degrees C and the strain rate is 1-0.1 s(-1). The instability zones of flow behaviour can also be identified using the processing map.
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