Hardening Mechanisms in Stainless Steel/Aluminum Bronze Composite Fabricated Using Electron Beam Additive Manufacturing

The authors investigated the features of structural-phase state a composite based on stainless austenitic steel with addition 25% (vol.) aluminum bronze. was obtained by electron beam additive technology simultaneous feeding two wires. paper considers analysis and mechanical characteristics. contributions various mechanisms to hardening were evaluated. It established that multiphase structure is formed in steel–25% bronze composite, which consists 43.9% austenite, 32.0% ferrite 24.2% Dispersion-hardened copper particles 47 vol % content precipitated inside austenite grains while only 20 dispersion-hardening NiAl grains. Transmission microscopy data indicate coherent conjugation between crystalline lattices these dispersion matrix. Such provides 50%, average, improvement tensile strength compared without found yield amounted 959.3, 972.7 408.7 MPa, respectively. Bronze do not make significant contribution increase except for its due dislocation hardening. main are made grain-boundary, hardening, solid-solution