scholarly journals Vacancy clustering and prismatic dislocation loop formation in aluminum

2007 ◽  
Vol 76 (18) ◽  
Author(s):  
Vikram Gavini ◽  
Kaushik Bhattacharya ◽  
Michael Ortiz
Keyword(s):  
Dislocation Loop ◽  
Loop Formation ◽  
Prismatic Dislocation Loop

Formation of a Prismatic Dislocation Loop in the Interface of a Circular Cylindrical Inclusion Embedded in a Thin Slab

2015 ◽  
Vol 83 (2) ◽  
Author(s):  
Jérôme Colin
Keyword(s):  
Dislocation Loop ◽  
Lattice Mismatch ◽  
Misfit Strain ◽  
Stability Diagram ◽  
Cylindrical Inclusion ◽  
Infinite Matrix ◽  
Loop Formation ◽  
Thin Slab ◽  
Lateral Extension ◽  
Prismatic Dislocation Loop

The introduction of a prismatic dislocation loop in the interface of an axisymmetric precipitate embedded in a thin slab of infinite lateral extension has been theoretically investigated. The critical misfit strain resulting from the lattice mismatch between the inclusion and the slab has been characterized for the loop formation versus the thickness of the slab and the radius of the inclusion. The case where the precipitate is embedded in a semi-infinite matrix is also discussed and a stability diagram of the structure is displayed with respect to the loop introduction versus the geometric and misfit parameters.

scholarly journals MINIMAL VARIATION OF DEFECT STRUCTURE DUE TO THE ORDER OF ROOM TEMPERATURE HYDROGEN ISOTOPE IMPLANTATION AND SELF-ION IRRADIATION IN NICKEL

MRS Advances ◽  
2016 ◽  
Vol 1 (42) ◽  
pp. 2887-2892
Author(s):  
Brittany Muntifering ◽  
Jianmin Qu ◽  
Khalid Hattar
Keyword(s):  
Dislocation Loop ◽  
Hydrogen Isotope ◽  
Room Temperature ◽  
Ion Irradiation ◽  
In Situ Tem ◽  
Loop Formation ◽  
Radiation Induced ◽  
Formation And Evolution ◽  
And Performance ◽  
Induced Defects

ABSTRACTThe formation and stability of radiation-induced defects in structural materials in reactor environments significantly effects their integrity and performance. Hydrogen, which may be present in significant quantities in future reactors, may play an important role in defect evolution. To characterize the effect of hydrogen on cascade damage evolution, in-situ TEM self-ion irradiation and deuterium implantation was performed, both sequentially and concurrently, on nickel. This paper presents preliminary results characterizing dislocation loop formation and evolution during room temperature deuterium implantation and self-ion irradiation and the consequence of the sequence of irradiation. Hydrogen isotope implantation at room temperature appears to have little or no effect on the final dislocation loop structures that result from self-ion irradiation, regardless of the sequence of irradiation. Tilting experiments emphasize the importance of precise two-beam conditions for characterizing defect size and structure.

In situ TEM and multiscale study of dislocation loop formation in the vicinity of a grain boundary

2020 ◽  
Vol 528 ◽  
pp. 151872 ◽  
Author(s):  
Qingshan Dong ◽  
Peyman Saidi ◽  
Laurent K. Béland ◽  
Zhongwen Yao ◽  
Cong Dai ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Dislocation Loop ◽  
In Situ Tem ◽  
Loop Formation

The circular prismatic dislocation loop in an interface

1979 ◽  
Vol 39 (5) ◽  
pp. 685-691 ◽  
Author(s):  
N. J. Salamon ◽  
M. Comninou
Keyword(s):  
Dislocation Loop ◽  
Prismatic Dislocation Loop

scholarly journals Cascade debris overlap mechanism of 〈100〉 dislocation loop formation in Fe and FeCr

2017 ◽  
Vol 119 (5) ◽  
pp. 56003 ◽  
Author(s):  
F. Granberg ◽  
J. Byggmästar ◽  
A. E. Sand ◽  
K. Nordlund
Keyword(s):  
Dislocation Loop ◽  
Loop Formation
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