Structural relaxation by interphase boundary migration in pure tin

1983 ◽  
Vol 2 (11) ◽  
pp. 653-656 ◽  
Author(s):  
R. Kamel ◽  
S. A. Mahmoud ◽  
Z. Farid ◽  
N. El Naquib
Keyword(s):  
Interphase Boundary ◽  
Structural Relaxation ◽  
Boundary Migration

Bowing mechanism for interphase boundary migration in alloy steels

Metal Science ◽  
1982 ◽  
Vol 16 (6) ◽  
pp. 317-322 ◽  
Author(s):  
R. A. Ricks ◽  
P. R. Howell
Keyword(s):  
Interphase Boundary ◽  
Boundary Migration ◽  
Alloy Steels

Measurement of solute segregation to grain boundaries in the AEM: A review

1988 ◽  
Vol 46 ◽  
pp. 606-607
Author(s):  
D. B. Williams ◽  
A. D. Romig
Keyword(s):  
Grain Boundary ◽  
Grain Boundaries ◽  
Boundary Migration ◽  
Grain Boundary Migration ◽  
Boundary Misorientation ◽  
Collector Plate ◽  
Segregation Process ◽  
Grain Boundary Misorientation ◽  
Structure Boundary ◽  
Equilibrium Segregation

The segregation of solute or imparity elements to grain boundaries can occur by three well-defined processes. The first is Gibbsian segregation in which an element of minimal matrix solubility confines itself to a monolayer at the grain boundary. Classical examples include Bi in Cu and S or P in Fe. The second process involves the depletion of excess matrix solute by volume diffusion to the boundary. In the boundary, the solute atoms diffuse rapidly to precipitates, causing them to grow by the ‘collector-plate mechanism.’ Such grain boundary diffusion is thought to initiate “Diffusion-Induced Grain Boundary Migration,” (DIGM). This process has been proposed as the origin of eutectoid transformations or discontinuous grain boundary reactions. The third segregation process is non-equilibrium segregation which result in a solute build-up around the boundary because of solute-vacancy interactions.All of these segregation phenomena usually occur on a sub-micron scale and are often affected by the nature of the grain boundary (misorientation, defect structure, boundary plane).

Domain coarsening by grain boundary migration in ordered Ni4Mo

1986 ◽  
Vol 44 ◽  
pp. 560-561
Author(s):  
K. Vasudevan ◽  
H. P. Kao ◽  
C. R. Brooks ◽  
E. E. Stansbury
Keyword(s):  
Grain Boundary ◽  
Grain Boundaries ◽  
Short Range ◽  
Boundary Migration ◽  
Grain Boundary Migration ◽  
Rapid Cooling ◽  
Temperature Range ◽  
Fee Structure ◽  
Domain Coarsening ◽  
Boundary Reaction

The Ni4Mo alloy has a short-range ordered fee structure (α) above 868°C, but transforms below this temperature to an ordered bet structure (β) by rearrangement of atoms on the fee lattice. The disordered α, retained by rapid cooling, can be ordered by appropriate aging below 868°C. Initially, very fine β domains in six different but crystallographically related variants form and grow in size on further aging. However, in the temperature range 600-775°C, a coarsening reaction begins at the former α grain boundaries and the alloy also coarsens by this mechanism. The purpose of this paper is to report on TEM observations showing the characteristics of this grain boundary reaction.

ANELASTIC BEHAVIOUR OF Ni100- xPxAMORPHOUS ELECTROLESS DEPOSITED ALLOYS DURING STRUCTURAL RELAXATION AND CRYSTALLIZATION

1985 ◽  
Vol 46 (C10) ◽  
pp. C10-481-C10-484
Author(s):  
E. BONETTI ◽  
E. LANZONI ◽  
G. PAPARO
Keyword(s):  
Structural Relaxation
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