Influences of solution cooling on microstructures, mechanical properties and hot corrosion resistance of a nickel-based superalloy

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-...

Full description

Saved in:
Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2019-02, Vol.746, p.372-383
Main Authors: He, Dao-Guang, Lin, Y.C., Tang, Yi, Li, Ling, Chen, Jian, Chen, Ming-Song, Chen, Xiao-Min
Format: Article
Language:English
Subjects:
Air conditioning
Cooling
Corrosion resistance
Elongation
Grain boundaries
Hot corrosion
Mechanical properties
Microhardness
Microstructures
Nickel
Nickel aluminides
Nickel base alloys
Oxidation
Precipitates
Solution cooling
Sulfidation
Superalloy
Superalloys
Ultimate tensile strength
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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′′ (Ni3Nb) and γ′ (Ni3Al) phases precipitate from the matrix, and δ (Ni3Nb) 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,
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2019.01.015