About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Thermodynamics and Kinetics of Alloys
|
Presentation Title |
Phase diagram determination of ternary systems for understanding the TCP phase formation in Ni-based superalloys |
Author(s) |
Chuangye Wang, Ji-Cheng Zhao |
On-Site Speaker (Planned) |
Chuangye Wang |
Abstract Scope |
Accurate predictions of the formation of the topologically close-packed (TCP) phases (σ, μ, P, and Laves) would significantly accelerate the design of both Ni-based and Co-based superalloys by reduction of both the long-term exposure experiments and the number of experimental iterations. Diffusion multiples were utilized to generate a large amount of tie-line data for the ternary systems in Co-(Cr,Ni)-(Mo,Nb,Ta,W) systems. To accelerate the electron-probe microanalysis (EPMA) data gathering process, fast digital WDS mapping was performed first to identify the key regions of interest and then detailed EPMA scans at the most critical regions were performed later. Such a combined process was found to be very effective in obtaining reliable tie-line data. The pertinent literature ternary phase diagram results were reassessed and combined with our experimental data. These data will be used for CALPHAD assessments of thermodynamic parameters of the TCP phases. |
Proceedings Inclusion? |
Planned: |
Keywords |
Copper / Nickel / Cobalt, |