Characterization of Duplex Stainless Steels by TEM (Transmission Electron Microscopy), SANS (Small-Angle Neutron Scattering), and APFIM (Atom-Probe Field Ion Microscopy) Techniques

摘要

Results are presented of complementary characterization of aged duplex stainless steels by advanced metallographic techniques, including transmission and high-voltage electron microscopies; small-angle neutron scattering; and atom-probe field ion microscopy. On the basis of the characterization, the mechanisms of aging embrittlement have been shown to be associated with the precipitation of Ni- and Si-rich G phase and Cr-rich alpha ' in the ferrite, and M sub 23 C sub 6 carbides on the austenite-ferrite phase boundaries. 19 refs., 19 figs., 1 tab. (ERA citation 13:011796)