Development of Thick Section Cast High Damping Steels
Abstract
Currently available steels suitable for structural applications in naval vessels generally exhibit low damping capacity. Steels with, high manganese contents have been shown to have much higher damping capacity, but tend to have yield stresses that are too low for, structural applications. In addition, these steels are often wrought limiting the shapes that can be produce or requiring welding f,abrication that impairs damping capacity and / or structural properties. To solve these issue integrated computational materials eng,ineering (ICME) will be used to design non-magnetic steels with high damping capacity, high strength and good ductility that can be, cast in thick sections (up to 10 inches). The microstructures of base high manganese steel compositions will be simulated with comp,osition modifications for a range of casting and heat treatment process parameters. The selected composition-processing parameter co,mbinations will be produced as trial (up to10 kg) melts for detailed characterization of microstructure and properties so that the s,imulations can be improved and the composition-processing parameter combinations can be optimized in three stages for (i) damping ca,pacity, (ii) strength and ductility and (iii) uniformity in thick sections with tolerance to impurities common to non-vacuum melting, and casting practice as is needed for thick section production. The optimized composition will be suitable for industrial scale-up, (TRL 6/7) so that ship-scale components could be tested a year after project completion. The development of these steels will enhan,ce the functionality of steels used in structural applications by the Navy with increased design (shape) flexibility through the use, of casting rather than wrought processing.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Oct 06, 2022
- Source ID
- N000142212515
Entities
People
- Martin Strangwood
Organizations
- Office of Naval Research
- United States Navy
- University of Warwick