TY - GEN
T1 - Field-Assisted Sintering of Nickel-Based Superalloy Powder for High-Temperature Hybrid Turbine Disc Applications
AU - Lin, Charis I.
AU - Niuman, Sebastian
AU - Yamamoto, Namiko
AU - Kulkarni, Anil
AU - Singh, Jogender
N1 - Publisher Copyright:
© 2019, The Minerals, Metals & Materials Society.
PY - 2019
Y1 - 2019
N2 - Turbine discs are currently made of nickel-based superalloys, known for their high strength and creep resistance at high temperatures. Hybrid or dual-microstructure turbine discs allow for significant weight savings, but current methods of joining dissimilar nickel-based superalloys such as friction welding exhibit a heat-affected zone and localized melting at the interface, leading to weak bonding. Here, we show that field-assisted sintering technology may be used to sinter the nickel-based superalloy powder CM247LC to high relative density, and the effect of sintering temperature and time on porosity, grain size, and mechanical properties of CM247LC is investigated. We also show that the same technology may be used to form hybrid discs with a solid Inconel 718 core and a powder-sintered CM247LC rim without the formation of a heat-affected zone at the interface. Two different joining angles between the two materials in the hybrid discs are explored, and preliminary results suggest that the joining angle does not affect the tensile properties of the material interface.
AB - Turbine discs are currently made of nickel-based superalloys, known for their high strength and creep resistance at high temperatures. Hybrid or dual-microstructure turbine discs allow for significant weight savings, but current methods of joining dissimilar nickel-based superalloys such as friction welding exhibit a heat-affected zone and localized melting at the interface, leading to weak bonding. Here, we show that field-assisted sintering technology may be used to sinter the nickel-based superalloy powder CM247LC to high relative density, and the effect of sintering temperature and time on porosity, grain size, and mechanical properties of CM247LC is investigated. We also show that the same technology may be used to form hybrid discs with a solid Inconel 718 core and a powder-sintered CM247LC rim without the formation of a heat-affected zone at the interface. Two different joining angles between the two materials in the hybrid discs are explored, and preliminary results suggest that the joining angle does not affect the tensile properties of the material interface.
UR - http://www.scopus.com/inward/record.url?scp=85064855144&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85064855144&partnerID=8YFLogxK
U2 - 10.1007/978-3-030-05955-2_17
DO - 10.1007/978-3-030-05955-2_17
M3 - Conference contribution
AN - SCOPUS:85064855144
SN - 9783030059545
T3 - Minerals, Metals and Materials Series
SP - 175
EP - 187
BT - 10th International Symposium on High-Temperature Metallurgical Processing, 2019
A2 - Padilla, Rafael
A2 - Yücel, Onuralp
A2 - Gregurek, Dean
A2 - Jiang, Tao
A2 - Peng, Zhiwei
A2 - Zhao, Baojun
A2 - Downey, Jerome P.
A2 - Keskinkilic, Ender
A2 - Hwang, Jiann-Yang
PB - Springer International Publishing
T2 - 10th International Symposium on High-Temperature Metallurgical Processing held at the TMS Annual Meeting and Exhibition, 2019
Y2 - 10 March 2019 through 14 March 2019
ER -