1. Bonding interfacial characterization of SiCp/8009Al composite and A356 aluminum alloy using compound casting.
- Author
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Liu, Haibin, Fu, Dingfa, Dong, Zhaoyu, Huang, Shaoxiong, and Zhang, Hui
- Subjects
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ALUMINUM alloys , *SILICON carbide , *CHEMICAL bonds , *COMPOSITE materials , *X-ray diffraction , *MICROSTRUCTURE , *ELECTRON backscattering - Abstract
Abstract Compound casting was performed to investigate the bonding of the molten A356 aluminum alloy cast onto the SiC p /8009Al composite that was preheated at 395–450 °C. The bonding strength was measured by carrying out a tensile test. The interfacial microstructures were characterized by scanning electron microscopy, energy dispersive spectroscope, X-ray diffraction and electron backscattered diffraction. The results showed that the bonding strength increased by 37% when the preheating temperature increased from 395 °C to 420 °C, and decreased by 6.8% as the preheating temperature further increased to 450 °C. A transition zone where the Al 4.5 FeSi phases were distributed was formed. The grain size of the Al 4.5 FeSi phase increased while its density decreased from the SiC p /8009Al composite to A356 aluminum alloy. The transition zone widened from 1350 μm to 3200 μm as the preheating temperature increased from 395 °C to 450 °C. In addition, at the preheating temperature of 450 °C, the fracture position changed from the interface between the A356 aluminum alloy and transition zone (at the preheating temperature of 395 °C and 420 °C) to the interior of the transition zone. The interface formation mechanism and its effect on the fracture mechanism were also discussed. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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