1. Influences of solution cooling on microstructures, mechanical properties and hot corrosion resistance of a nickel-based superalloy.
- Author
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He, Dao-Guang, Lin, Y.C., Tang, Yi, Li, Ling, Chen, Jian, Chen, Ming-Song, and Chen, Xiao-Min
- Subjects
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NICKEL alloys , *HEAT resistant alloys , *COOLING , *METAL microstructure , *CORROSION resistance , *MECHANICAL properties of metals , *CORROSION in alloys - Abstract
Abstract The influences of solution cooling on the microstructures, mechanical properties and hot corrosion resistance of a nickel-based superalloy are researched. It is found that the mechanical properties and hot corrosion resistance are greatly influenced by the solution cooling methods including furnace-cooling (FC), water-cooling (WC) and air-cooling (AC). For the FC superalloy, large amount of coarse γ′′ (Ni 3 Nb) and γ′ (Ni 3 Al) phases precipitate from the matrix, and δ (Ni 3 Nb) phase preferentially precipitates on grain boundaries. Besides, compared with the WC and AC superalloys, the ultimate tensile strength, yield strength and micro-hardness of the FC superalloy are higher, but the elongation to fracture is lower. Additionally, the hot corrosion behavior can be well described by the sulfidation-oxidation model and the alkaline-base melting model. Furthermore, the FC superalloy has the best hot corrosion resistance among the three solution cooled superalloys, [ABSTRACT FROM AUTHOR]
- Published
- 2019
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