The superior ductility of fine SiCp/Al2014 composites after extrusion

• Main Authors: Zhang Long-Jiang, Qiu Feng, Wang Jin-Guo, Jiang Qi-Chuan
• Format: Article
• Language: English
• Published: De Gruyter 2017-03-01
• Series: Science and Engineering of Composite Materials
• Subjects: hot extrusion; microstructures; sic/al composites; tensile properties
• Online Access: https://doi.org/10.1515/secm-2014-0461

This paper studied the effect of extrusion on the microstructures and tensile properties of 4 vol.% 5 μm SiCp/Al2014 composites fabricated by stir casting. It has been found that extrusion could refine the α-Al grains, increase the distributed homogeneity of SiC particles, decrease the porosity of the composites, and improve the interfacial bonding strength. The tensile properties, especially the ductility, of the fine SiCp/Al2014 composites were significantly improved by extrusion. Compared with the as-cast 4 vol.% 5 μm SiCp/Al2014 composites, the yield strength, ultimate tensile strength, and fracture strain of the extruded composites increased from 242 MPa, 367 MPa, and 3.8% to 304 MPa, 530 MPa, and 11.2%, which were increased by 25.6%, 44.4%, and 195%, respectively.