Journal
ACTA METALLURGICA SINICA-ENGLISH LETTERS
Volume 27, Issue 5, Pages 875-884Publisher
CHINESE ACAD SCIENCES, INST METAL RESEARCH
DOI: 10.1007/s40195-014-0127-2
Keywords
Aluminum matrix composites; Silicon carbide; Tensile properties; Facture toughness; Particle size
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Funding
- High Technology Research and Development Program of China [2013AA031200]
- National Basic Research Program of China [2012CB619600]
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15 vol% silicon carbide particle (SiCp)-reinforced 2009Al matrix (15 vol% SiCp/2009Al) composites were fabricated by hot isostatic pressing (HIP) and hot extrusion processes. The tensile and fracture properties of 15 vol% SiCp/2009Al were studied. The results showed that hot extrusion increased the ultimate tensile strength (UTS), yield strength (YS), elongation (EL), reduction in area (RA), and fracture toughness of the composites. The heat treatment resulted in the increase in UTS, YS, and fracture toughness, but a decrease in EL and RA. Both hot extrusion and heat treatment had negligible effects on elastic modulus (E). With the increase of SiCp size the UTS, YS, and E decreased, but the EL and RA P increased. The fracture toughness increased first and then decreased with increasing SiCp size, and when the SiCp size was about 7 mu m, the composites obtained the maximum fracture toughness value of 31.74 MPa m(1/2).
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