Effect of initial gamma prime size on the elevated temperature creep properties of single crystal nickel base superalloys

1987 ◽  
Vol 18 (11) ◽  
pp. 1961-1970 ◽  
Author(s):  
M. V. Nathal
Keyword(s):  
Elevated Temperature ◽  
Single Crystal ◽  
Creep Properties ◽  
Gamma Prime ◽  
Temperature Creep ◽  
Nickel Base Superalloys ◽  
Nickel Base

Effect of Heat Treatment Solution on the Size and Distribution of Gamma Prime (γ´) of Super-alloy INCONEL 738

2012 ◽  
Vol 1372 ◽  
Author(s):  
I. Guzmán ◽  
A. Garza ◽  
F. Garcia ◽  
J. Acevedo ◽  
R. Méndez
Keyword(s):  
Heat Treatment ◽  
Elevated Temperature ◽  
Elevated Temperature Strength ◽  
Gamma Prime ◽  
The Matrix ◽  
Nickel Base Superalloys ◽  
Size And Morphology ◽  
Aero Engines ◽  
Nickel Base ◽  
Nozzle Guide

ABSTRACTNickel base superalloys, which are gamma prime γ‘(Ni3Al, Ti) precipitation strengthened, is largely responsible for the elevated-temperature strength of the material and the higher resistance to creep deformation. The amount of γ’ depends on the chemical composition and temperature, heat treatment, these alloy are widely used in hot sections of aero-engines, land based turbines, stator parts, nozzle guide vanes, blades and integral wheels, due to its excellent elevated temperature strength and hot corrosion resistance. The γ‘ size decreases not only by the high temperature of heat treatment solution (1120 °C), the cooling environment and cooling rate are important parameter to decrease γ’ size to 0.65 μm. This paper presents the effect of heat treatment solution in base nickel IN 738 superalloy under service conditions, on the size and morphology of the gamma phase γ’ Ni3 (Al, Ti), main phase in the nickel base superalloys. Also shown coarse carbide and precipitates gamma prime size distributed and improve interdentritic spacing in the matrix after heat treatment solution.

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