Experimental study of the dynamic mechanical properties of an Al-SiC(w) composite
This report presents initial results of an experimental study of the dynamic deformation and dynamic fracture behavior of a 2124-T6 aluminum alloy reinforced with 13.2 v/o silicon carbide whiskers. Results are compared with the quasi-static behavior and with the behavior of the unreinforced 2124-T6 aluminum alloy. Two types of tests are described, one to provide static and dynamic stress-strain curves of the material in shear and the other to measure static and dynamic values of the critical stress intensity factors, K/sub Ic/ and K/sub Id/, for tensile fracture. Results show that the presence of the reinforcing whiskers raises the dynamic and static flow stress of the material in shear. It is also evident that the reinforced material has considerably more ductility in shear than it has in axial deformation. As expected, the fracture response, as measured by the critical stress intensity factor K sub Ic, is not as favorable for the reinforced material as for the unreinforced. However, dynamic loading raises the value of K sub Ic for the reinforced material while producing almost no change in the unreinforced. For the reinforced material, the rate of loading is important in determining toughness, as measured by the value of K sub I, but has little influence on the stress-strain behavior in shear.
- Research Organization:
- Brown Univ., Providence, RI (USA). Div. of Engineering
- OSTI ID:
- 6545105
- Report Number(s):
- AD-A-177583/2/XAB
- Country of Publication:
- United States
- Language:
- English
Similar Records
Mechanical properties of several magnesium and aluminum composites. Final report
Microstructural evolution and micromechanical modeling of the mechanical behavior of a ceramic particle-reinforced metal-matrix composite