| About this Abstract |
| Meeting |
Materials Science & Technology 2020
|
| Symposium
|
Solid State Processing of Metals and Composites
|
| Presentation Title |
Solid State Joining of Dissimilar Ni-based Superalloys via Field Assisted Sintering Technology for Turbine Applications |
| Author(s) |
Charis Iann Lin, Namiko Yamamoto, Derek S. King, Jogender Singh |
| On-Site Speaker (Planned) |
Namiko Yamamoto |
| Abstract Scope |
Current methods to join nickel-based superalloys of dissimilar microstructures, such as friction welding and cold metal transfer, lead to localized melting and a heat affected zone, compromising the microstructure and mechanical properties of the parent materials. In this work, Field Assisted Sintering Technology (FAST) is studied as an alternative method to diffusion bond the dissimilar nickel-based superalloys CM247LC and Inconel 718. Microstructures at the bonding region will be studied, and mechanical properties such as hardness, elastic modulus, and tensile strength will be compared to that of the parent materials. Preliminary results suggest that diffusion bonding using FAST leads to an interface free of major defects without producing a heat affected zone (HAZ); electromigration during the FAST process may lead to enhanced diffusion, and sintering temperatures below the melting point may eliminate HAZ formation. |