Composition design and microstructure of Ni-based single crystal superalloy with low specific weight—numerical modeling and experimental validation
Source abstract
Abstract
Ni-based single crystal (SX) superalloys with low specific weight are essential for developing aero engine turbine blades with great strength to weight ratios. To develop such alloys, numerical analysis methods for specific weight, the volume fraction of γ′ phase and elemental partitioning coefficients between γ and γ′ phases are collected and analyzed based on literature data of Ni-based superalloys. Specific weight can be well predicted based on the weight percentage of each element, and tungsten has the most significant effect. Rhenium has the greatest elemental partitioning coefficient which might provide a strengthening effect for the γ matrix. Thus, we design four model alloys with rhenium but without tungsten for experimental validation with the aid of thermodynamic calculation. It is found that after solid solution and aging treatments, four alloys all have required typical γ/γ′ two phase microstructure, and specific weight is all lower than 8.4 g/cm3.Graphical abstract
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Research context
OpenAlex topics: High Temperature Alloys and Creep · High-Temperature Coating Behaviors · Intermetallics and Advanced Alloy Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (34)
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