High-strength corrosion-resistant FeMnCr-based composite damping alloys fabricated by vacuum annealing

High-strength high manganese FeMn-based damping alloys suffer from lower damping capacity at low strain amplitudes and poor corrosion resistance, while the strength is lower in stainless ferromagnetic FeCr-based alloys with high damping capacity at low strain amplitudes. By simple vacuum annealing, we fabricated high-strength, high-manganese FeMnCr-based alloys coated with ferromagnetic FeCr-based stainless damping alloys. Compared to the FeMn-based alloys, the FeMnCr-based composite alloys showed not only higher damping capacity at low strain amplitudes and higher tensile strength but also much better corrosion resistance. Stress relief annealing could further improve their damping capacity. The vacuum annealing will offer a new technique for fabricating composite alloys with unique properties.