文摘
The deformation mechanisms of a bulk nanostructured Fe-30Mn-9.5Al-2.0C (in wt.%) alloy were investigated. After aging at 450 掳C for 9-12 h, the alloy exhibits an exceptional strength-ductility combination (e.g. yield strength 鈭?406 MPa with elongation 鈭?2%). The aged alloy exhibits a novel microstructure with isolated austenite nano-channels bounded by an extremely high volume fraction of directional nano-sized (Fe,Mn)3AlC carbides (魏鈥?carbides). The plastic deformation was found to be dominated by bursting dislocation nucleation within the isolated austenite nano-channels.