Dimensionality of interstitial cluster motion in bcc-Fe

Terentyev, D.; Malerba, Lorenzo; Hou, Marc

doi:10.1103/physrevb.75.104108

Cited by 140 publications

(170 citation statements)

References 64 publications

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“…Discussion of the dimensionality of I n 's motion of α-Fe can be found elsewhere. 11,[20][21][22] Taken together, those studies indicate: I 1 and I 2 have 3D motion; I 3 , I 4 and I 5 have mixed 1D/3D motion; I n (n≥6) has 1D motion. In the present study, defects reactions occur only in cascades and ignored 3D motion for I 3 , I 4 and I 5 .…”

Section: Annealing Methodsmentioning

confidence: 99%

“…In the present study, defects reactions occur only in cascades and ignored 3D motion for I 3 , I 4 and I 5 . Because a recent molecular dynamics study 21) claims that I 3 has almost 3D motion, we check the influence of this parameter later in Section III. 3.…”

Section: Annealing Methodsmentioning

confidence: 99%

“…We determined E m for I n (n≥3) based on a recent thorough molecular dynamics study by Anento et al 22) D 0 for each migrating defect can be roughly estimated from molecular dynamics, and D 0 for I n were determined with reference to the results given in Refs. 21,22). The values for D 0 , E m , and d for each defect type are given in Table 3.…”

Section: Annealing Methodsmentioning

confidence: 99%

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Kinetic Monte Carlo Annealing Simulation of Cascade Damage in α-Fe

Suzudo

Golubov

Stoller

et al. 2011

Progress in Nuclear Science and Technology

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Molecular dynamics is a useful tool for simulating cascade damage in metals and alloys, but the time scale accessible to molecular dynamics is only about 10 -10 s. Kinetic Monte Carlo can be used to simulate annealing of cascade damage to permit analysis of the longer time evolution of cascade damage. We conducted a series of such annealing simulations in α-Fe. The number of surviving displacements before annealing is ~0.3 of the Norgett-Robinson-Torrens (NRT) value in the case of primary knock-on atoms with energy more than ~10 keV, and it decreased by ~30% during the annealing at 300 K because of recombination of vacancies and self-interstitial atoms. The recombination ratio increased as the annealing temperature increased. These results can be meaningfully applied in models such as mean field reaction rate theory used to simulate long-term radiation damage accumulation. We also demonstrated that 1D motion of small SIA clusters can substantially influence the long-term accumulation of cascade damage.

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Section: Annealing Methodsmentioning

confidence: 99%

Section: Annealing Methodsmentioning

confidence: 99%

Section: Annealing Methodsmentioning

confidence: 99%

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Kinetic Monte Carlo Annealing Simulation of Cascade Damage in α-Fe

Suzudo

Golubov

Stoller

et al. 2011

Progress in Nuclear Science and Technology

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“…Through extensive molecular dynamics simulation (MD) studies, [5][6][7][8][9] it has been revealed that perfect interstitial-type dislocation loops with Burgers vector of 1/2<111> in α-iron can undergo one-dimensional (1D) glide diffusion (Brownian motion) along their Burgers-vector directions by thermal energy even in the absence of stresses. The activation energy for the 1D glide motion, EMD, was evaluated to be less than 0.1 eV, [5][6][7][8][9] which meant that the 1D diffusion was an extremely fast process.…”

Section: Introductionmentioning

confidence: 99%

“…The activation energy for the 1D glide motion, EMD, was evaluated to be less than 0.1 eV, [5][6][7][8][9] which meant that the 1D diffusion was an extremely fast process. This phenomenon is believed to play key roles in the degradation processes of radiation-resistant materials used in nuclear-fission and fusion devices; [10][11][12] therefore, it has also been theoretically [13][14][15] and experimentally [16][17][18][19][20][21][22] studied.…”

Section: Introductionmentioning

confidence: 99%

One-Dimensional Glide Motion of “Naked” Nanoscale 1/2^|^lt;111^|^gt; Prismatic Dislocation Loops in Iron

et al. 2014

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One-dimensional (1D) glide diffusion of interstitial-type prismatic dislocation loops is believed to play key roles in microstructural evolutions within nuclear-fusion and fission materials upon energetic particle irradiation. In the present study, using in-situ transmission electron microscopy, we have examined behaviors of nanoscale 1/2<111> loops in high-purity α-iron at "low temperatures" ranging from 15 to 290 K, under zero external stress. We observed 1D intermittent and fast motion of loops above approximately 100 K, which was significantly different from the 1D continuous and viscous motion observed at "high temperatures" above approximately 450 K. The estimated lower-limit values of diffusivities for "low temperatures" were considerably higher than the values obtained through the extrapolation of the temperature dependence of the diffusivities at "high temperatures." These results support the idea that strong obstacles for loop motion are formed by heating of the specimens to "high temperatures" after the introduction of loops.

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Highly Enhanced Transport by Supersonic N‐Crowdions

Dmitriev

Medvedev

Chetverikov

et al. 2017

Physica Rapid Research Ltrs

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An interstitial atom placed in a close‐packed atomic row of a crystal is called crowdion. Such defects are highly mobile, they can move along the row transporting mass and energy. In the present study the concept of the classical supersonic crowdion is generalized to N‐crowdion in which not one but N atoms move simultaneously at a high speed. With the help of molecular dynamics simulations for fcc Morse crystal it is demonstrated that N‐crowdions are much more efficient in mass transport being able to propagate through larger distances having smaller total energy than the classical 1‐crowdion.

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Dimensionality of interstitial cluster motion in bcc-Fe

Cited by 140 publications

References 64 publications

Kinetic Monte Carlo Annealing Simulation of Cascade Damage in α-Fe

Kinetic Monte Carlo Annealing Simulation of Cascade Damage in α-Fe

One-Dimensional Glide Motion of “Naked” Nanoscale 1/2^|^lt;111^|^gt; Prismatic Dislocation Loops in Iron

Highly Enhanced Transport by Supersonic N‐Crowdions

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