| Abstract Scope |
High-damping Fe-Mn steels are advantageous in applications where vibrations and noise are undesirable; however, their current strength is not sufficient for load-bearing applications. To overcome this limitation, first, the benefits of defect engineering to simultaneously increase strength and damping are discussed, employing a modified Granato-Lücke model to describe the observed damping properties, based on the oscillation of extended dislocations. Second, applying the CALPHAD-assisted alloy design framework, a design approach for a precipitation-strengthened, high-strength, high-damping steel is explored. To that end, a description complying with the third law of thermodynamics is implemented, connecting the damping properties to the underlying thermodynamics. Experimental findings on a prototype alloy validate this design approach. Ultimately, this study investigates the mechanisms that govern the damping properties of Fe-Mn steels, establishing defect engineering and CALPHAD-assisted alloy design as promising pathways to develop high-strength, high-damping steels for load-bearing applications. |