An Experimental Study of the Dynamic Mechanical Properties of an Al-SiC(W) Composite,
Abstract
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 carbon whiskers. Results are compared with the quasistatic 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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1986
- Accession Number
- ADA177583
Entities
People
- A. Marchand
- J. Duffy
- S. Suresh
- T. A. Christman
Organizations
- Brown University