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Optimizing a Solution Heat Treatment by Increasing the Cooling Rate of Directional Solidification for Ni-Based Superalloys

Year: 2023
Type: article
Abstract: The solution heat treatment (SHT) of the third generation of single crystal (SC) Ni-based superalloys required up to 45 h and was expensive. In this study, SHT based on liquid metal cooling (LMC) was optimized to greatly reduce processing time. The experimental and simulation results showed that residual segregation was evidently reduced, e.g., from 2.12 to 1.22 for the most heavily segregated Re. This led to a 16.7% increase in creep life, more uniform microstructures, and a decrease in solidification and homogenization porosity by a factor of 3.4. Structural refinement, approximately 0.32 times, served as the underlying mechanism for this optimization, which reduced diffusion distance and increased homogenization efficiency during SHT.
Source: Materials
DOI: 10.3390/ma16093433
Authors: Yanbin Zhang, Ling Qin, Bin Zhu, Haijun Jiang, Li Tan, Taiwen Huang, Bin Gan, Ziqi Jie, Lin Liu
Institutions: Chongqing University of Technology, University of Wyoming, Northwestern Polytechnical University, State Key Laboratory of Solidification Processing, China Iron and Steel Research Institute Group, Xi'an Technological University
Language: English
Open Access status: gold
Estimated APC paid: $2,558
Awards: G12679847, G1285799110, G2866092524, G2956631572, G3022399940, G3151946694, G3383862672, G3691262712, G4049432719, G4593610601, G4872906174, G4947809440, G5355290873, G5980472575, G695691055, G770898801, G8307651550, G8680587122, G8700772171
OpenAlex ID: W4367299698
FWCI: 0.764
Cites: 20
Cited by: 8
Related to: 10