Microstructure and Properties of Stainless Steels Processed by Accumulative Roll-bonding

Accumulative roll-bonding(ARB) was employed to produce ultra-fine grain microstructures in stainless steels.Microstructure,mechanical properties and fracture surface were examined.The ARB processed materials had lamellar ultra-fine grains,and the tensile strength was improved remarkably.The tensile strength of the stainless steel could reach 1 060 MPa.Slight necking was found near the fracture tip and there were dimples on the whole fracture surface,indicating that the fracture was ductile.