Formation of helium-bubble networks in tungsten

Sandoval, Luis; Perez, Danny; Uberuaga, Blas P.; Voter, Arthur F.

doi:10.1016/j.actamat.2018.07.075

Formation of helium-bubble networks in tungsten

Journal Article · Mon Aug 06 00:00:00 EDT 2018 · Acta Materialia

DOI:https://doi.org/10.1016/j.actamat.2018.07.075· OSTI ID:1543506

^[1]; Perez, Danny ^[2]; ^[2]; Voter, Arthur F. ^[2]

Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); NASA Ames Research Center (ARC), Moffett Field, Mountain View, CA (United States)
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

The nucleation and subsequent growth of helium bubbles in bulk tungsten is investigated using molecular dynamics simulations. By considering a setting that includes the diffusion process of helium clusters, we study their attachment to existing bubbles and their interaction with tungsten crowdion structures generated in the bubble growth process. Here, we find that incoming helium atoms, and especially small helium clusters, can become trapped in the crowdion structures, providing nucleation sites for new helium bubbles, and leading to a distributed network of bubbles rather than a single, growing bubble. The nature of this network depends on both the temperature and the implantation flux of helium. Our results indicate that the kinetic interaction of He with generated dislocations is a key factor dictating the evolution of bubble distributions in plasma-exposed tungsten.

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); UT-Battelle LLC/ORNL, Oak Ridge, TN (Unted States); Univ. of California, Oakland, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR). Scientific Discovery through Advanced Computing (SciDAC); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Grant/Contract Number:: AC02-05CH11231; AC05-00OR22725

OSTI ID:: 1543506

Alternate ID(s):: OSTI ID: 1703851
OSTI ID: 22744826

Journal Information:: Acta Materialia, Journal Name: Acta Materialia Journal Issue: C Vol. 159; ISSN 1359-6454

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

References (29)

Fast Parallel Algorithms for Short-Range Molecular Dynamics Plimpton, Steve Journal of Computational Physics, Vol. 117, Issue 1 https://doi.org/10.1006/jcph.1995.1039	journal	March 1995
Microstructure evolution in tungsten during low-energy helium ion irradiation Iwakiri, H.; Yasunaga, K.; Morishita, K. Journal of Nuclear Materials, Vol. 283-287 https://doi.org/10.1016/S0022-3115(00)00289-0	journal	December 2000
Thermal stability of helium–vacancy clusters in iron Morishita, K.; Sugano, R.; Wirth, B. D. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 202 https://doi.org/10.1016/S0168-583X(02)01832-3	journal	April 2003
Modeling plasma facing materials for fusion power Duffy, D. M. Materials Today, Vol. 12, Issue 11 https://doi.org/10.1016/S1369-7021(09)70297-4	journal	November 2009
Recent analysis of key plasma wall interactions issues for ITER Roth, Joachim; Tsitrone, E.; Loarte, A. Journal of Nuclear Materials, Vol. 390-391 https://doi.org/10.1016/j.jnucmat.2009.01.037	journal	June 2009
Formation of helium induced nanostructure ‘fuzz’ on various tungsten grades Baldwin, M. J.; Doerner, R. P. Journal of Nuclear Materials, Vol. 404, Issue 3 https://doi.org/10.1016/j.jnucmat.2010.06.034	journal	September 2010
Interatomic potentials for simulation of He bubble formation in W Juslin, N.; Wirth, B. D. Journal of Nuclear Materials, Vol. 432, Issue 1-3 https://doi.org/10.1016/j.jnucmat.2012.07.023	journal	January 2013
Helium retention and early stages of helium-vacancy complexes formation in low energy helium-implanted tungsten Lhuillier, P. E.; Belhabib, T.; Desgardin, P. Journal of Nuclear Materials, Vol. 433, Issue 1-3 https://doi.org/10.1016/j.jnucmat.2012.09.001	journal	February 2013
Reflection and implantation of low energy helium with tungsten surfaces Borovikov, Valery; Voter, Arthur F.; Tang, Xian-Zhu Journal of Nuclear Materials, Vol. 447, Issue 1-3 https://doi.org/10.1016/j.jnucmat.2014.01.021	journal	April 2014
Atomistic modeling of growth and coalescence of helium nano-bubbles in tungsten Smirnov, R. D.; Krasheninnikov, S. I.; Guterl, J. Journal of Nuclear Materials, Vol. 463 https://doi.org/10.1016/j.jnucmat.2014.10.033	journal	August 2015
Systematic investigation of the formation behavior of helium bubbles in tungsten Miyamoto, M.; Mikami, S.; Nagashima, H. Journal of Nuclear Materials, Vol. 463 https://doi.org/10.1016/j.jnucmat.2014.10.098	journal	August 2015
A molecular dynamics study on bubble growth in tungsten under helium irradiation Kobayashi, Ryo; Hattori, Tatsunori; Tamura, Tomoyuki Journal of Nuclear Materials, Vol. 463 https://doi.org/10.1016/j.jnucmat.2014.12.049	journal	August 2015
Temperature impact on the micro structure of tungsten exposed to He irradiation in LHD Bernard, Elodie; Sakamoto, Ryuichi; Tokitani, Masayuki Journal of Nuclear Materials, Vol. 484 https://doi.org/10.1016/j.jnucmat.2016.10.040	journal	February 2017
Temperature dependence of underdense nanostructure formation in tungsten under helium irradiation Valles, G.; Martin-Bragado, I.; Nordlund, K. Journal of Nuclear Materials, Vol. 490 https://doi.org/10.1016/j.jnucmat.2017.04.021	journal	July 2017
The mobility of small vacancy/helium complexes in tungsten and its impact on retention in fusion-relevant conditions Perez, Danny; Sandoval, Luis; Blondel, Sophie Scientific Reports, Vol. 7, Issue 1 https://doi.org/10.1038/s41598-017-02428-2	journal	May 2017
Elastic fields of a dislocation loop near a stress‐free surface Ohr, S. M. Journal of Applied Physics, Vol. 49, Issue 9 https://doi.org/10.1063/1.325503	journal	September 1978
The thermodynamic and kinetic interactions of He interstitial clusters with bubbles in W Perez, Danny; Sandoval, Luis; Uberuaga, Blas P. Journal of Applied Physics, Vol. 119, Issue 20 https://doi.org/10.1063/1.4951706	journal	May 2016
A new interatomic potential function for helium Beck, D. E. Molecular Physics, Vol. 14, Issue 4 https://doi.org/10.1080/00268976800100381	journal	January 1968
The interaction of injected helium with lattice defects in a tungsten crystal Kornelsen, E. V. Radiation Effects, Vol. 13, Issue 3-4 https://doi.org/10.1080/00337577208231184	journal	April 1972
An improved N -body semi-empirical model for body-centred cubic transition metals Ackland, G. J.; Thetford, R. Philosophical Magazine A, Vol. 56, Issue 1 https://doi.org/10.1080/01418618708204464	journal	July 1987
Simulation of cascades in tungsten–helium Juslin, N.; Jansson, V.; Nordlund, K. Philosophical Magazine, Vol. 90, Issue 26 https://doi.org/10.1080/14786435.2010.492248	journal	September 2010
The dislocation loop near a free surface Groves, P. P.; Bacon, D. J. Philosophical Magazine, Vol. 22, Issue 175 https://doi.org/10.1080/14786437008228153	journal	July 1970
He cluster dynamics in W in the presence of cluster induced formation of He traps Krasheninnikov, S. I.; Smirnov, R. D. Physica Scripta, Vol. T167 https://doi.org/10.1088/0031-8949/T167/1/014021	journal	January 2016
Visualization and analysis of atomistic simulation data with OVITO–the Open Visualization Tool Stukowski, Alexander Modelling and Simulation in Materials Science and Engineering, Vol. 18, Issue 1 https://doi.org/10.1088/0965-0393/18/1/015012	journal	December 2009
Recent advances in modeling and simulation of the exposure and response of tungsten to fusion energy conditions Marian, Jaime; Becquart, Charlotte S.; Domain, Christophe Nuclear Fusion, Vol. 57, Issue 9 https://doi.org/10.1088/1741-4326/aa5e8d	journal	June 2017
Self-trapping of helium in metals Wilson, W. D.; Bisson, C. L.; Baskes, M. I. Physical Review B, Vol. 24, Issue 10 https://doi.org/10.1103/PhysRevB.24.5616	journal	November 1981
Diffusion and transformation kinetics of small helium clusters in bulk tungsten Perez, Danny; Vogel, Thomas; Uberuaga, Blas P. Physical Review B, Vol. 90, Issue 1 https://doi.org/10.1103/PhysRevB.90.014102	journal	July 2014
Competing Kinetics and He Bubble Morphology in W Sandoval, Luis; Perez, Danny; Uberuaga, Blas P. Physical Review Letters, Vol. 114, Issue 10 https://doi.org/10.1103/PhysRevLett.114.105502	journal	March 2015
Modeling of the self trapping of helium and the trap mutation in tungsten using DFT and empirical potentials based on DFT Boisse, J.; De Backer, A.; Domain, C. Journal of Materials Research, Vol. 29, Issue 20 https://doi.org/10.1557/jmr.2014.258	journal	October 2014

Similar Records

The thermodynamic and kinetic interactions of He interstitial clusters with bubbles in W

Journal Article · Sat May 28 00:00:00 EDT 2016 · Journal of Applied Physics · OSTI ID:22596709

The thermodynamic and kinetic interactions of He interstitial clusters with bubbles in W

Journal Article · Wed May 25 20:00:00 EDT 2016 · Journal of Applied Physics · OSTI ID:1414089

Growth rate effects on the formation of dislocation loops around deep helium bubbles in Tungsten

Journal Article · Mon Nov 14 19:00:00 EST 2016 · Fusion Science and Technology · OSTI ID:1334150

Related Subjects

36 MATERIALS SCIENCE
42 ENGINEERING
Materials Science
Metallurgy & Metallurgical Engineering
Molecular dynamics
Nucleation and growth
Tungsten

Formation of helium-bubble networks in tungsten

Citation Formats

References (29)

Similar Records

Related Subjects