About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
|
Materials for High Temperature Applications: Next Generation Superalloys and Beyond
|
Presentation Title |
Feasibility of Near-net-shape HIP Fabrication and PM/Wrought Weld in Alloy IN740H for AUSC Components |
Author(s) |
Shenyan Huang, Victor Samarov, Jack deBarbadillo, Timothy Hanlon, Beth Lewis, Ronnie Gollihue, John Shingledecker, Jason Mortzheim |
On-Site Speaker (Planned) |
Shenyan Huang |
Abstract Scope |
To reduce manufacturing cost and CAPEX of advanced ultra-super critical (AUSC) steam components, powder metallurgy (PM) based near-net-shape (NNS) HIP fabrication was investigated as an alternative manufacturing modality. Feasibility of NNS HIP for this application was demonstrated in a ~65kg pipe elbow using gas atomized powder of alloy IN740H. A finite element HIP simulation was performed to predict the non-uniform shrinkage during HIP and to design the HIP capsule of the pipe elbow. Measured physical and mechanical properties of partially and fully densified IN740H powder were used for model calibration. The HIP cycle was tuned to optimize grain size and achieve balanced properties. Creep performance of PM HIP’ed IN740H was evaluated at 700~800°C, up to 500 hours. PM HIP to wrought IN740H welding procedures were also developed to obtain reasonable microstructure and cross-weld mechanical properties. |
Proceedings Inclusion? |
Planned: |