Utilization of Ultrasonic Measurements to Characterize Low and High Temperature Embritlement in Duplex Stainless Steel
Metadata:Show full item record
Duplex stainless steels (DSS) have large application on different fields like ship, petrochemical and chemical industry. It has been a concern in these industries, the capability of this steel of forming s-phase through transformation of ferrite (δ) into both austenite () and phase (δ -> + ) during extended exposure to elevated temperatures ranging from 650 °C to 900 °C. Material texture affects the wave speed by the so-called birefringent phenomenon. In cold-worked metals, annealing even at modest temperatures can also initiate recrystallization, thereby reversing the effects of plastic deformation. For a long-period usage in full safety, there is a need of establishing a NDE technique to evaluate the degradation of the materials. Another problem with DSS is that as all ferritic stainless steels, duplex stainless steels are susceptible to the embrittlement phenomenon if they are exposed during service at a temperature between 280°C and 500 °C. This phenomenon is known as 475 °C embrittlement since it has been reported that the rate of embrittlement is highest at 475 °C ad it is caused by thermally activated microstructural changes due to the precipitation of nanometric precipitates of α′.
Publisher:XXV International Materials Research Congress
Citation:Gutiérrez Vargas, G., Ruiz Marines, A., Kim, Y.-Y., Ortiz Lara, N., 2016a. Utilization of Ultrasonic Measurements to Characterize Low and High Temperature Embritlement in Duplex Stainless Steel. Cartel presentado en: XXV International Materials Research Congress, Cancún, Quintana Roo, México.
UNESCO International Nomenclature: Tecnología metalúrgica-> Productos electrometalúrgicos
 Tecnología metalúrgica-> Productos metalúrgicos (especiales)
INIS/ETDE Thesaurus:Ultrasonic testing