Theory and experimental background on dimensional changes in irradiated alloys

Mansur, L.K.

doi:10.1016/0022-3115(94)90009-4

Cited by 292 publications

(127 citation statements)

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“…Helium atoms can stabilize vacancies and small voids and lower the critical radius for cavity growth [33]. Helium stabilization of vacancies is therefore an important precursor for subsequent changes in materials properties, and the identification and observed evolution of these vacancies provides important information for subsequent modeling of aging mechanisms in irradiated materials.…”

Section: Vacancies In Plutonium Studied By Positron Annihilationmentioning

confidence: 99%

Electronic structure calculations of vacancies and their influence on materials properties

Sterne

Howell

1998

Computational Materials Science

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August 1997This is a preprint of a paper intended for publication in a journal or proceedings. Since changes may be made before publication, this preprint is made available with the understanding that it will not be cited or reproduced without the permission of the author. PREPRINTThis paper was prepared for submittal to the DISCLAIMER This document was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor the University of California nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or the University of California. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or the University of California, and shall not be used for advertising or product endorsement purposes.

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Section: Vacancies In Plutonium Studied By Positron Annihilationmentioning

confidence: 99%

Electronic structure calculations of vacancies and their influence on materials properties

Sterne

Howell

1998

Computational Materials Science

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“…This issue severely restricts the lifetime of structural materials in nuclear reactors. The micro-structure evolution of the material under irradiation is the key for understanding the phenomenon of radiation induced swelling [1]. It is well known that a biased absorption of self interstitial atoms (SIA) by dislocations is crucial for void swelling under high temperature and high radiation dose.…”

Section: Introductionmentioning

confidence: 99%

Multiscale calculations of dislocation bias in fcc Ni and bcc Fe model lattices

Chang

Olsson

Terentyev

et al. 2015

Nuclear Instruments and Methods in Physics Research Section B:

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a b s t r a c tIn order to gain more insights on void swelling, dislocation bias is studied in this work. Molecular static simulations with empirical potentials are applied to map the dislocation-point defects interaction energies in both fcc Ni and bcc Fe model lattices. The interaction energies are then used to numerically solve the diffusion equation and obtain the dislocation bias. The importance of the dislocation core region is studied under a the temperature range 573-1173 K and the dislocation densities 10 12 -10 15 m À2 . The results show that larger dislocation bias is found in the fcc Ni than in the bcc Fe under different temperatures and dislocation densities. The anisotropic interaction energy model is used to obtain the dislocation bias and the result is compared to that obtained using the atomistic interaction model, the contribution from the core structure is then shown in both the Ni lattice and the Fe lattice.

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“…Atomistic simulations revealed the thermodynamic and kinetic properties of point defects in various crystals under irradiation. On the macro-scale, based on a mean-field approximation of reaction kinetics with the generation of defects, rate theory (RT) models 12,13 have been developed to a great extent in an attempt to explain the variety of phenomena observed: radiation-induced hardening, creep, swelling, segregation and second-phase precipitation. However, the models did not take into account the spatial arrangement of irradiation defects and microstructure as well as the inhomogeneity and anisotropy of defect mobility.…”

Section: Introductionmentioning

confidence: 99%