Process of the One-Dimensional Motion of Small Interstitial-Type Dislocation Loops in Iron

2006 ◽  
pp. 103-106 ◽  
Author(s):  
K. Arakawa ◽  
Hirotaro Mori
Keyword(s):  
Dislocation Loops ◽  
One Dimensional ◽  
Type Dislocation ◽  
The One

Process of the One-Dimensional Motion of Small Interstitial-Type Dislocation Loops in Iron

2006 ◽  
Vol 512 ◽  
pp. 103-106 ◽  
Author(s):  
K. Arakawa ◽  
Hirotaro Mori
Keyword(s):  
Habit Plane ◽  
Dislocation Loops ◽  
Long Distance ◽  
One Dimensional ◽  
Large Loop ◽  
Transmission Electron ◽  
Perfect Dislocation ◽  
Motion Process ◽  
Type Dislocation ◽  
The One

Extensive simulations based on classical molecular dynamics have shown that small interstitial-type perfect dislocation loops in various metals and alloys have the structure of bundles of crowdions and a loop can easily makes the one-dimensional glide motion due to almost independent motion of crowdions in the loop. However, the experimental knowledge on the motion of loops is not enough. The present study dynamically examined the motion process of loops in pure iron under 1000 keV electron irradiation and thermal annealing by using transmission electron microscopy under which loops could move. Two types of loops were formed by irradiation. Loops of one type possessed the Burgers vector of 1/2<111> and the habit plane of {011}, and loops of the other type were <001> {001}. Loops of the former type made back-andforth glide motion and expansion towards the direction along their Burgers vectors when they were smaller than about a few-ten nanometers in diameter. This strongly suggests that these small 1/2<111> loops have the structure of the bundle of crowdions. Loops of the latter type only rarely moved less frequently when they were smaller than about the same size. When loops of two types grew larger than about 50 nm, the characteristics of the motion of loops changed drastically. Dislocation segments of each large loop made long-distance glide independently of their opposite segments, and the habit plane deviated from the original ones. This kind of motion means that selfinterstitial atoms at the central region of such large loops are no longer the crowdions.

scholarly journals In-situ study of one-dimensional motion of interstitial-type dislocation loops in hydrogen-ion-implanted aluminum

2022 ◽  
Vol 71 (1) ◽  
pp. 016102-016102
Author(s):  
Li Ran-Ran ◽  
◽  
Zhang Yi-Fan ◽  
Yin Yu-Peng ◽  
Watanabe Hideo ◽  
...  
Keyword(s):  
Hydrogen Ion ◽  
Dislocation Loops ◽  
One Dimensional ◽  
Type Dislocation ◽  
Ion Implanted

Observation of the One-Dimensional Diffusion of Nanometer-Sized Dislocation Loops

Science ◽  
2007 ◽  
Vol 318 (5852) ◽  
pp. 956-959 ◽  
Author(s):  
K. Arakawa ◽  
K. Ono ◽  
M. Isshiki ◽  
K. Mimura ◽  
M. Uchikoshi ◽  
...  
Keyword(s):  
Dislocation Loops ◽  
One Dimensional ◽  
Dimensional Diffusion ◽  
The One

Exploring the Multidimensional Facets of Authoritarianism: Authoritarian Aggression and Social Dominance Orientation

2008 ◽  
Vol 67 (1) ◽  
pp. 51-60 ◽  
Author(s):  
Stefano Passini
Keyword(s):  
Social Dominance ◽  
Factor Model ◽  
Three Dimensional ◽  
Social Dominance Orientation ◽  
Model Fit ◽  
Regression Analyses ◽  
One Dimensional ◽  
Confirmatory Factor ◽  
The One ◽  
Better Than

The relation between authoritarianism and social dominance orientation was analyzed, with authoritarianism measured using a three-dimensional scale. The implicit multidimensional structure (authoritarian submission, conventionalism, authoritarian aggression) of Altemeyer’s (1981, 1988) conceptualization of authoritarianism is inconsistent with its one-dimensional methodological operationalization. The dimensionality of authoritarianism was investigated using confirmatory factor analysis in a sample of 713 university students. As hypothesized, the three-factor model fit the data significantly better than the one-factor model. Regression analyses revealed that only authoritarian aggression was related to social dominance orientation. That is, only intolerance of deviance was related to high social dominance, whereas submissiveness was not.

Adiabatic large polarons in anisotropic molecular crystals

2011 ◽  
Vol 35 (1) ◽  
pp. 15-27
Author(s):  
Zoran Ivić ◽  
Željko Pržulj
Keyword(s):  
Energy Transfer ◽  
Effective Mass ◽  
Molecular Crystals ◽  
Single Chain ◽  
Proper Understanding ◽  
One Dimensional ◽  
Interchain Coupling ◽  
Large Polaron ◽  
The One

Adiabatic large polarons in anisotropic molecular crystals We study the large polaron whose motion is confined to a single chain in a system composed of the collection of parallel molecular chains embedded in threedimensional lattice. It is found that the interchain coupling has a significant impact on the large polaron characteristics. In particular, its radius is quite larger while its effective mass is considerably lighter than that estimated within the one-dimensional models. We believe that our findings should be taken into account for the proper understanding of the possible role of large polarons in the charge and energy transfer in quasi-one-dimensional substances.

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