Abstract
As a part of a more extensive study [1] of aging embrittlement at low temperature (280–400°C) of cast duplex stainless steels, a close characterization of the evolution of toughness of three duplex steels with different ferrite content (12,18 and 22%) has been performed. Fracture toughness characterization was based on the determination of JR curves, in accordance with the European Recommendations ESIS P1-92 and following the unloading compliance single specimen method. Impact toughness was determined with an instrumented Charpy pendulum, which permits the load-deflection and energy deflection curves to be obtained. From the obtained results, a phenomenological model based on the presence of brittle ferrite in the fracture path has been developed. This model enables the impact toughness and the fracture toughness to be determined as a function of aging time and aging temperature for a duplex steel, and therefore to predict fracture toughness values from Charpy, results. Finally, a comparison has been made between energy predicted from impact and experimentally obtained fracture toughness for the three steels.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
