About this Abstract |
Meeting |
2021 AWS Professional Program
|
Symposium
|
2021 AWS Professional Program
|
Presentation Title |
Design and Fabrication of Graded Transition Joints between Grade 91 Ferritic/Martensitic Steel and 347 Austenitic Stainless Steels Using Integrated Computational Materials Engineering (ICME) Approach |
Author(s) |
Rangasayee Kannan, Yousub Lee, Peeyush Nandwana, Brian Jordan, Andres Marquez Rossy |
On-Site Speaker (Planned) |
Rangasayee Kannan |
Abstract Scope |
In this study, graded transition joint between grade 91 ferritic martensitic steel and 347 austenitic stainless steel has been designed using ICME principles and fabricated using directed energy deposition (DED). Using CALPHAD to estimate the C chemical potential gradient across the transition zone, a unique transition zone involving 5 different compositions has been proposed. Alongside the predictions for C chemical potential gradient, CALPHAD was used to predict the coefficient of thermal expansion for the different compositions, which were used as inputs for the finite element model to predict the stress generated in the graded transition joint. It was found that the proposed transition zone involving 5 different compositions produced a shallower C chemical potential gradient and lower stress during long-term aging than the conventional transition zone involving 10 compositions varying linearly. |
Proceedings Inclusion? |
Definite: Other |