Study on Heat-treatment of Ultra-high Strength Aluminum Matrix Composite reinforced with SiC Particles
The 7090/SiC p composite was made by spray co-deposition with moving crucible, the effects of two solution treatment on microstructures and mechanical properties of the composite were studied. The microstructures of extruded, heat treated and XRD were also investigated. Compared with the two solution treatment, the results show that the ultimate tensile strength of the composite can only reach 715MPa when solution treated at 475℃for 1h and aged at 120℃for 24 h, however, the other ultimate tensile strength of the composite can reach 765MPa when solution treated at 450℃for 3h and 500℃for 3 h, then aged at 120℃for 18h.