About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
|
Accelerated Discovery and Qualification of Nuclear Materials for Energy Applications
|
Presentation Title |
Evaluation of Creep Deformation of Ferritic/Martensitic (FM) Grade 91 Steel Fabricated Using Wire Arc Additive Manufacturing (WAAM) |
Author(s) |
Mahmoud Y. Hawary, K. L. Murty |
On-Site Speaker (Planned) |
Mahmoud Y. Hawary |
Abstract Scope |
Additive Manufacturing (AM) is a revolutionary technology and a transformative approach in the industry to fabricate complex structures from user-specific materials targeting specific properties and microstructure making it a competitive technology for the nuclear industry. Modified 9Cr-1Mo steel (Grade 91) is one of the main nuclear materials that have different applications in different types of reactors. In this work, the creep deformation of Grade-91 fabricated using Wire Arc Additive Manufacturing (WAAM) is evaluated. Constant load uniaxial creep tests were performed in air while monitoring the axial strains using a linear variable differential transformer (LVDT) extensometer. The tests have been conducted at different stress levels (90-200 MPa) and different temperatures (550 – 750 oC) to obtain the underlying creep mechanisms. Samples with different shielding gas compositions and tempering treatments have been considered in order to study the impact of various processing and post-processing techniques on the creep behavior. |
Proceedings Inclusion? |
Planned: |