Chemical composition measurements of a nickel-base superalloy by atom probe field ion microscopy

1995 ◽  
Vol 203 (1-2) ◽  
pp. 69-74 ◽  
Author(s):  
Nelia Wanderka ◽  
Uwe Glatzel
Keyword(s):  
Chemical Composition ◽  
Atom Probe ◽  
Nickel Base Superalloy ◽  
Probe Field ◽  
Field Ion Microscopy ◽  
Ion Microscopy ◽  
Nickel Base ◽  
Base Superalloy ◽  
Composition Measurements

High Resolution Analysis of Elemental Partitioning in Nickel-Base Superalloy Welds Using Atom Probe Field Ion Microscopy

1998 ◽  
Vol 4 (S2) ◽  
pp. 94-95
Author(s):  
S. S. Babu ◽  
S. A. David ◽  
J. M. Vitek ◽  
M. K. Miller
Keyword(s):  
Single Crystal ◽  
Atom Probe ◽  
Microstructural Development ◽  
Nickel Base Superalloy ◽  
Probe Field ◽  
Field Ion Microscopy ◽  
High Resolution Analysis ◽  
Weld Properties ◽  
Ion Microscopy ◽  
Nickel Base

Weldability of single-crystal and directionally solidified Ni-base alloys is important for repairwelding of failed components. During welding, phase decomposition and subsequent microstructure development may occur under non-equilibrium conditions. The final microstructure and phase composition of γ and γ' phases in these welds control the weld properties. Previous work used atom-probe field-ion microscopy (APFIM) for characterizing commercial single-crystal alloys. This work summarizes the microstructural development in PWA-1480 [Ni - 11.5 at. % Cr - 11.0% A1 - 5.1% Co - 1.3% W - 1.9% Ti - 4.0% Ta] electron beam (EB) welds and CMSX-4 [Ni - 7.5 at. % Cr - 12.7% A1 - 9.9% Co - 0.38% Mo -2.1% W - 1.3% Ti - 2.2% Ta - 0.95% Re - 0.034% Hf| pulsed laser (PL) welds.In both PL and EB welds, a dendritic mode of weld solidification was observed.

scholarly journals Atom-Probe Field-Ion Microscopy Investigation of CMSX-4 Ni-Base Superalloy Laser Beam Welds

1996 ◽  
Vol 06 (C5) ◽  
pp. C5-253-C5-258 ◽  
Author(s):  
S. S. Babu ◽  
S. A. David ◽  
J. M. Vitek ◽  
M. K. Miller
Keyword(s):  
Laser Beam ◽  
Atom Probe ◽  
Probe Field ◽  
Field Ion Microscopy ◽  
Microscopy Investigation ◽  
Ion Microscopy ◽  
Base Superalloy

Atom Probe Analysis of the Compositions of γ′ AND γ″ Intermetallic Phases in Nickel-Based Superalloy 718

1990 ◽  
Vol 186 ◽  
Author(s):  
M. K. Miller ◽  
M. G. Burke
Keyword(s):  
Heat Treatment ◽  
Atom Probe ◽  
Nickel Base Superalloy ◽  
Probe Field ◽  
Nickel Based Superalloy ◽  
Transmission Electron ◽  
Transmission Electron Microscopy Characterization ◽  
Nickel Base ◽  
Microscopy Characterization ◽  
Base Superalloy

AbstractAn atom probe field ion microscopy and transmission electron microscopy characterization has been performed on the intragranular precipitates that are formed in a niobium-modified nickel-base superalloy 718 after the various stages of a multistage heat treatment. Atom probe results indicate that there is a wide variation in the compositions of the DO22-ordered γ″, the Ll2-ordered γ′ precipitates and the γ matrix with heat treatment and with position in the microstructure.

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