The Role of Inverse Segregation and Redistribution of Solute Atoms in the Freezing of Hypoeutectic Lead-Antimony Alloys

1954 ◽  
Vol 101 (11) ◽  
pp. 536 ◽  
Author(s):  
A. C. Simon ◽  
E. L. Jones
Keyword(s):  
Inverse Segregation ◽  
Solute Atoms ◽  
Antimony Alloys

Role of Vacancies and Solute Atoms on Grain Boundary Sliding

1999 ◽  
Vol 601 ◽  
Author(s):  
J.S. Vetrano ◽  
C.H. Henager ◽  
E.P. Simonen
Keyword(s):  
Grain Boundary ◽  
Solute Atom ◽  
Vacancy Concentration ◽  
Grain Boundary Sliding ◽  
Fine Grained ◽  
Grain Boundary Plane ◽  
Transmission Electron ◽  
Boundary Sliding ◽  
Solute Atoms

AbstractIt is necessary for grain boundary dislocations to slide and climb during the grain boundary sliding process that dominates fine-grained superplastic deformation. The process of climb requires either an influx of vacancies to the grain boundary plane or a local generation of vacancies. Transmission electron microscopy (TEM) observations of grain boundaries in superplastically deformed Al-Mg-Mn alloys quenched under load from the deformation temperature have revealed the presence of nano-scale cavities resulting from a localized supersaturation of vacancies at the grain boundary. Compositional measurements along interfaces have also shown an effect of solute atoms on the local structure. This is shown to result from a coupling of vacancy and solute atom flows during deformation and quenching. Calculations of the localized vacancy concentration indicate that the supersaturation along the grain boundary can be as much as a factor often. The effects of the local supersaturation and solute atom movement on deformation rates and cavity nucleation and growth will be discussed.

scholarly journals Decisive role of magnetism in the interaction of chromium and nickel solute atoms with 1/2〈111〉-screw dislocation core in body-centered cubic iron

2016 ◽  
Vol 121 ◽  
pp. 137-143 ◽  
Author(s):  
Kh. Odbadrakh ◽  
G. Samolyuk ◽  
D. Nicholson ◽  
Y. Osetsky ◽  
R.E. Stoller ◽  
...  
Keyword(s):  
Screw Dislocation ◽  
Decisive Role ◽  
Dislocation Core ◽  
Body Centered Cubic ◽  
Solute Atoms

Abnormal Grain Growth Induced by Boundary Segregation of Solute Atoms

2007 ◽  
Vol 558-559 ◽  
pp. 1093-1099 ◽  
Author(s):  
Seong Gyoon Kim ◽  
Won Tae Kim ◽  
Yong Bum Park
Keyword(s):  
Grain Growth ◽  
Boundary Segregation ◽  
Phase Field Model ◽  
Solute Drag ◽  
Abnormal Grain Growth ◽  
Dispersed Particles ◽  
Segregation Effect ◽  
Solute Atoms ◽  
2D And 3D

Abnormal grain growth (AGG) proceeds in case that normal grain growth is inhibited. It has long been known that the inhibition involves finely dispersed particles and/or the development of specific textures. There is another strong obstacle against the grain boundary (GB) motion; the solute atoms can reduce their energy by moving from the bulk into a GB. Resultant interaction between the solute atoms and a GB makes the GB motion more difficult. However the role of the GB segregation effect on AGG has not been clarified. In this study we simulate the 2D and 3D grain growth accompanying boundary segregation of solute atoms by using a phase-field model. It is shown that the segregation plays an important role on the occurrence of AGG. The boundary-segregation-induced AGG can take place when the average driving force of grain growth approaches a critical condition for pinning-depinning transition in solute-drag atmosphere.

Activation Volume and the role of solute atoms in Al-Mg-Si alloy processed by Equal Channel Angular Extrusion

2021 ◽  
pp. 163334
Author(s):  
Amel Soula ◽  
Jean Philippe Couzinié ◽  
Hanen Heni ◽  
Julie Bourgon ◽  
Yannick Champion ◽  
...  
Keyword(s):  
Activation Volume ◽  
Equal Channel Angular Extrusion ◽  
Angular Extrusion ◽  
Solute Atoms

Role of solute atoms on microstructural evolution in neutron irradiated nickel

1994 ◽  
Vol 212-215 ◽  
pp. 270-274 ◽  
Author(s):  
K. Hamada ◽  
S. Kojima ◽  
Y. Ogasawara ◽  
T. Yoshiie ◽  
M. Kiritani
Keyword(s):  
Microstructural Evolution ◽  
Solute Atoms

A model of inverse segregation: the role of microporosity

1995 ◽  
Vol 38 (6) ◽  
pp. 1009-1018 ◽  
Author(s):  
V.R. Voller ◽  
Suresh Sundarraj
Keyword(s):  
Inverse Segregation

Role of dactinomycin in the improved survival of children with Wilms' tumor

JAMA ◽  
1966 ◽  
Vol 195 (12) ◽  
pp. 1005-1009 ◽  
Author(s):  
D. J. Fernbach
Keyword(s):  
Wilms Tumor

Role of the allergist in diagnosis and management of patients with uveitis

JAMA ◽  
1966 ◽  
Vol 195 (3) ◽  
pp. 167-172 ◽  
Author(s):  
T. E. Van Metre
Keyword(s):  
Diagnosis And Management
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