About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Solid State Diffusion Bonding of Metals and Alloys
|
| Presentation Title |
O-49: Joining of 14YWT Ferritic ODS Alloys by Spark Plasma Technique |
| Author(s) |
Madhavan Radhakrishnan, Elisa Torresani, Eugene Olevsky, Stuart Maloy, Osman Anderoglu |
| On-Site Speaker (Planned) |
Madhavan Radhakrishnan |
| Abstract Scope |
Nanostructured ferritic ODS alloys are promising candidates for fuel cladding applications due to their stable microstructure, strength and radiation tolerance at high temperatures. Here, spark plasma joining of as-rolled nanostructured 14YWT ferritic ODS alloys have been carried out at 800°C, 1020°C and 1030°C under a uniaxial pressure of 40 MPa. Samples bonded at 1030°C showed better chemical bonding with homogeneous microstructure across the interface, without any reduction in the hardness values compared to the base alloys. Density measurements indicate that samples joined at 1030°C are 98.6% dense, with some micro-voids trapped at the interface. The samples joined at 800°C yielded an incomplete bond with micro-cracks that runs along the entire sample. The presence of columnar grains continuously near the interface suggests the possibility of localized melting and subsequent solidification of the alloy as a result of local temperature rise that could be attributed to high contact resistance at the interface. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |