| Abstract Scope |
Metallic materials have desirable properties for transportation systems due to their damage tolerance, fabricability, and stiffness. However, metals by character are relatively dense. High strength and high stiffness are necessary to acceptable specific strength and stiffness values. At the macro scale, truss and other engineering structures produce lowered densities. At the microscale, metal matrix syntactic foams offer improved specific properties but suffer from significant fabrication issues. Mesoscale structures, sometimes called lattice or cellular structures, offer improved properties and can be fabricated using AM. In this talk the issues with producing high performance, reliable structures will be discussed with examples. The combination of a defect producing process such as AM and a defect sensitive structure will require significant understanding of this interaction and strategies for mitigating them. |