scholarly journals ATOM-PROBE INVESTIGATION OF THE EARLY STAGES OF DECOMPOSITION IN A NICKEL-BASE SUPERALLOY

1987 ◽  
Vol 48 (C6) ◽  
pp. C6-361-C6-366
Author(s):  
S. Chambreland ◽  
D. Blavette ◽  
M. Bouet
Keyword(s):  
Atom Probe ◽  
Nickel Base Superalloy ◽  
Early Stages ◽  
Nickel Base ◽  
Base Superalloy ◽  
Probe Investigation

Application of Atom Probe Microanalysis for Understanding Microstructure Evolution in Nickel Base Superalloy Welds

2000 ◽  
Vol 6 (S2) ◽  
pp. 350-351
Author(s):  
S. S. Babu ◽  
S. A. David ◽  
M. K. Miller
Keyword(s):  
Microstructure Evolution ◽  
Predictive Models ◽  
Strong Relationship ◽  
Atom Probe ◽  
Systematic Investigation ◽  
Nickel Base Superalloy ◽  
Cooling Conditions ◽  
Nickel Base ◽  
Base Superalloy

The characterization of the microstructure evolution during welding of nickel base superalloys is required for efficient reuse and reclamation of used and failed components. Previous atom probe analysis of electron-beam and laser-beam welds revealed complex alloying elemental partitioning between the γ and γ phases. Rapid cooling conditions in the weld leads to non-equilibrium partitioning and large amplitude Cr and Co levels in the γ phase. These results indicated that there is a strong relationship between weld cooling rate and the precipitation of γ′ precipitates from the γ phase. To understand and develop predictive models, a systematic investigation of the microstructure evolution in CM247DS alloy under controlled thermomechanical conditions are being performed. This paper describes some recent results on the elemental partitioning between γ and γ′ phases obtained with atom probe microanalysis.

TEM and 3D atom probe characterization of DMS4 cast nickel-base superalloy

2009 ◽  
Vol 44 (9) ◽  
pp. 2218-2225 ◽  
Author(s):  
K. Muraleedharan ◽  
R. Balamuralikrishnan ◽  
N. Das
Keyword(s):  
Atom Probe ◽  
Nickel Base Superalloy ◽  
Nickel Base ◽  
Base Superalloy
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