Discontinuous Precipitation in U-10 wt.%Mo Alloy: Reaction Kinetics, Effect of Prior γ-UMo Microstructure, the Role of Grain-Boundary Misorientation, and the Effect of Ternary Alloying Addition

JOM ◽  
2019 ◽  
Vol 71 (8) ◽  
pp. 2770-2779 ◽  
Author(s):  
Saumyadeep Jana ◽  
Nicole Overman ◽  
Arun Devaraj ◽  
Lucas Sweet ◽  
Curt Lavender ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Reaction Kinetics ◽  
Discontinuous Precipitation ◽  
Boundary Misorientation ◽  
Grain Boundary Misorientation ◽  
Ternary Alloying

scholarly journals Effect of grain boundary misorientation on discontinuous precipitation in an AZ91 alloy

2011 ◽  
Vol 34 (7) ◽  
pp. 1471-1476 ◽  
Author(s):  
H. Azzeddine ◽  
S. Abdessameud ◽  
B. Alili ◽  
Z. Boumerzoug ◽  
D. Bradai
Keyword(s):  
Grain Boundary ◽  
Discontinuous Precipitation ◽  
Az91 Alloy ◽  
Boundary Misorientation ◽  
Grain Boundary Misorientation

An atomistic simulation study of nanoscale sintering: The role of grain boundary misorientation

2019 ◽  
Vol 165 ◽  
pp. 180-189 ◽  
Author(s):  
Jesse M. Sestito ◽  
Fadi Abdeljawad ◽  
Tequila A.L. Harris ◽  
Yan Wang ◽  
Allen Roach
Keyword(s):  
Grain Boundary ◽  
Simulation Study ◽  
Atomistic Simulation ◽  
Boundary Misorientation ◽  
Grain Boundary Misorientation

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).

Sign in / Sign up

Export Citation Format

Share Document