The effect of elastic interaction energy on the morphology of γ′precipitates in nickel-based alloys

1984 ◽  
Vol 67 (2) ◽  
pp. 247-253 ◽  
Author(s):  
Minoru Doi ◽  
Toru Miyazaki ◽  
Teruyuki Wakatsuki
Keyword(s):  
Interaction Energy ◽  
Elastic Interaction

Elastic Interaction of Defects on Crystal Surfaces

1999 ◽  
Vol 121 (2) ◽  
pp. 129-135 ◽  
Author(s):  
Demitris Kouris ◽  
Alonso Peralta ◽  
Karl Sieradzki
Keyword(s):  
Interaction Energy ◽  
Surface Defects ◽  
Film Growth ◽  
Crystal Surface ◽  
Elastic Field ◽  
Elastic Interaction ◽  
Flow Mode ◽  
Elastic Model ◽  
Far Field ◽  
Embedded Atom

Surface defects corresponding to adatoms, vacancies and steps interact, affecting and often dominating kinetic processes associated with thin-film growth. A discrete harmonic model for the evaluation of the interaction energy between surface defects is presented. It is based on the concept of eigenstrains and allows for the accurate evaluation of the elastic field, both at the immediate vicinity of the defects, as well as in the far field. Results for the interaction energy suggest conditions for which a body-centered-cubic crystal surface will grow in a stable, two-dimensional, step-flow mode. In order to verify the accuracy of the discrete elastic model, we present results of atomic simulations that incorporate Embedded Atom Method (EAM) potentials. The discrete elastic model results compare favorably with results from our atomic EAM simulations and agree with the far-field predictions of continuum elastic theory.

Perovskite Ti3AlC Carbide Splitting in High Nb Containing TiAl Alloys

2014 ◽  
Vol 1760 ◽  
Author(s):  
Li Wang ◽  
Heike Gabrisch ◽  
Uwe Lorenz ◽  
Frank-Peter Schimansky ◽  
Andreas Stark ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Interaction Energy ◽  
Elastic Interaction ◽  
Morphological Development ◽  
Tial Alloys ◽  
Transmission Electron ◽  
The Matrix

ABSTRACTTransmission electron microscopy has been used to investigate the morphological development of the perovskite (P-) Ti3AlC carbides in the γ matrix of a Ti-45Al-5Nb-0.75C alloy during annealing. P-Ti3AlC carbides in the γ matrix initially have a needle-like shape but during annealing at 800 °C they change to a plate-like shape. In the needle-like shape the carbides are orientated parallel to the [001] direction of the matrix. They extend along the [100]γ or [010]γ direction into plates later and subsequently split into sub particles after extended annealing. It is proposed that the elastic interaction energy between the split sub domains may be the reason that this decomposition into sub-particles is energetically favorable.

Size-dependent reversal of the elastic interaction energy between misfit nanostructures

2013 ◽  
Vol 25 (7) ◽  
pp. 075802 ◽  
Author(s):  
L Persichetti ◽  
A Sgarlata ◽  
M Fanfoni ◽  
A Balzarotti
Keyword(s):  
Interaction Energy ◽  
Elastic Interaction ◽  
Size Dependent

Elastic interaction energy of two spherical precipitates in an anisotropic matrix

1979 ◽  
Vol 10 (8) ◽  
pp. 1141-1149 ◽  
Author(s):  
William C. Johnson ◽  
Jong K. Lee
Keyword(s):  
Interaction Energy ◽  
Elastic Interaction
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