In-situ TEM observations of helium bubble interactions with dislocations

Wright, Roger N.; Siclen, Clinton DeW. Van

doi:10.1016/0022-3115(93)90237-s

Cited by 12 publications

(3 citation statements)

References 18 publications

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“…The advantages are as follows: 1) the implantation conditions can be well controlled and widely varied; 2) high He concentration can be achieved in a short time. There is substantial literature pertaining to the growth behaviors of gas bubbles in gas ion implanted ferritic alloys [21,25,26], aluminum alloys [27][28][29], nickel [30], tungsten [31] and also some zirconium alloys [32][33][34][35]. A blister of helium bubble has been reported by Zee et al in He implanted cold-worked Zr-2.5Nb alloy with He dose up to 2.0 × 10 18 He + /cm 2 at temperature from 100 K to 773 K [33,34].…”

Section: Introductionmentioning

confidence: 94%

Helium bubble evolution in a Zr–Sn–Nb–Fe–Cr alloy during post-annealing: An in-situ investigation

Shen

Peng

Chen

et al. 2015

Materials Characterization

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Section: Introductionmentioning

confidence: 94%

Helium bubble evolution in a Zr–Sn–Nb–Fe–Cr alloy during post-annealing: An in-situ investigation

Shen

Peng

Chen

et al. 2015

Materials Characterization

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“…This behavior can be explained by elastic interactions between the inclusions and the dislocation [3,5,8]. From thermal motion data obtained in in situ TEM experiments the diffusion coefficients of He bubbles [9] and liquid Pb inclusions [3][4][5]10] attached to fixed dislocations in Al-based alloys were determined. It was shown that for inclusions of a given size the diffusivities of free inclusions and inclusions attached to dislocations were comparable [3].…”

Section: Introductionmentioning

confidence: 99%

Correlated thermal motion of two liquid Pb inclusions attached to a fixed dislocation in an Al matrix

Prokofjev

Johnson

2017

J. Phys. Commun.

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Thermal motion of two liquid lead inclusions attached to the same fixed dislocation in an Al-0.65 at% Pb alloy is studied in situ at 447°C using transmission electron microscopy. Observations of their motion is recorded on video and analyzed frame by frame. Random oscillatory motion of the inclusions on the dislocation line occurs as a result of their mutual repulsion and their repulsion from the fixed ends of the dislocation caused by the dislocation line tension. The oscillations of the inclusions can be considered as correlated thermal motion in coupled potential wells. The effective potentials, in which the inclusions move, and the effective potential of their interactions are evaluated. It is found that the spatial correlations of the positions of the inclusions on the dislocation depend strongly on the interaction potential. The observed correlations of the positions of the inclusions suggest that they move along their averaged trajectories in a synchronous-like manner.

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“…demonstrate a notable mobility in solids at elevated temperature [1,2]. In crystalline materials a large fraction of inclusions are attached to dislocations that act as pinning defects [2][3][4]. Therefore, their behaviour contributes to the behaviour and properties of the entire material.…”

Section: Introductionmentioning

confidence: 99%

Influence of Elasticity of Dislocations on Thermal Motion of Trapped Liquid Pb Inclusions in Al

Prokofjev

Johnson²,

Zhilin

et al. 2006

Mass and Charge Transport in Inorganic Materials III

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Thermal motion of nanoscale liquid Pb inclusions attached to fixed dislocations in thin Al foils is investigated using in-situ TEM. In contrast with 3D random motion of free inclusions, the attached inclusions demonstrate oscillations in the close proximity of the dislocations. This is due to the elasticity of the dislocations. It is found that inclusions captured by one dislocation repulse at small separations, and attract at large ones and this is also caused by the dislocation elasticity. Such behaviour of trapped inclusions can be considered as a motion in a potential well or in coupled potential wells in the case of motion of several trapped inclusions on one dislocation. The potential of interaction of an inclusion with a dislocation and the potential of mutual interaction between inclusions are determined.

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In-situ TEM observations of helium bubble interactions with dislocations

Cited by 12 publications

References 18 publications

Helium bubble evolution in a Zr–Sn–Nb–Fe–Cr alloy during post-annealing: An in-situ investigation

Helium bubble evolution in a Zr–Sn–Nb–Fe–Cr alloy during post-annealing: An in-situ investigation

Correlated thermal motion of two liquid Pb inclusions attached to a fixed dislocation in an Al matrix

Influence of Elasticity of Dislocations on Thermal Motion of Trapped Liquid Pb Inclusions in Al

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