| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advancing Current and State-of-the-Art Application of Ni- and Co-based Superalloys
|
| Presentation Title |
Recent Advances in Inertia Friction Welding of Dissimilar Ni-base Superalloys |
| Author(s) |
Oleg N. Senkov, David W. Mahaffey, S. Lee Semiatin |
| On-Site Speaker (Planned) |
Oleg N. Senkov |
| Abstract Scope |
Significant differences in the elevated temperature deformation behavior of cast and powder metallurgy superalloys challenge the ability to produce sound bonds of these alloys by inertia friction welding (IFW). The limited plastic flow of the stronger material during welding limits the bond plane ‘‘self-cleaning’’ and mechanical mixing of the mating surfaces, such that defects generally remain at the bond plane after welding. In this talk, recent advances in inertia friction welding of dissimilar Ni-base superalloys are presented. The relationships between the IFW process parameters, welding machine efficiency and welding response are investigated. The kinetics and efficiency of the transformation of the flywheel mechanical energy into frictional heating at the bond plane, kinetics of flash formation, and bond quality are identified. The effect of pre-heating on plastic flow and resulting weld quality is also discussed. Conditions resulting in sound welding are outlined. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |