|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Solid State Diffusion Bonding of Metals and Alloys
||O-49: Joining of 14YWT Ferritic ODS Alloys by Spark Plasma Technique
||Madhavan Radhakrishnan, Elisa Torresani, Eugene Olevsky, Stuart Maloy, Osman Anderoglu
|On-Site Speaker (Planned)
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.
||Planned: Supplemental Proceedings volume