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Title: Computer Simulation of Bubble Growth in Metals Due to He

Abstract

Atomistic simulations of the growth of helium bubbles in metals are performed. The metal is represented by embedded atom method potentials for palladium. The helium bubbles are treated via an expanding repulsive spherical potential within the metal lattice. The simulations predict bubble pressures that decrease monotonically with increasing helium to metal ratios. The swelling of the material associated with the bubble growth is also computed. It is found that the rate of swelling increases with increasing helium to metal ratio consistent with experimental observations on the swelling of metal tritides. Finally, the detailed defect structure due to the bubble growth was investigated. Dislocation networks are observed to form that connect the bubbles. Unlike early model assumptions, prismatic loops between the bubbles are not retained. These predictions are compared to available experimental evidence.

Authors:
;
Publication Date:
Research Org.:
Sandia National Labs., Albuquerque, NM (US); Sandia National Labs., Livermore, CA (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
780304
Report Number(s):
SAND2001-0661
TRN: US0102464
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 1 Mar 2001
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BUBBLE GROWTH; DISLOCATIONS; HELIUM; PALLADIUM; COMPUTERIZED SIMULATION; SWELLING; TRITIDES; INTERSTITIAL HELIUM GENERATION

Citation Formats

FOILES, STEPHEN M, and HOYT, JEFFREY J. Computer Simulation of Bubble Growth in Metals Due to He. United States: N. p., 2001. Web. doi:10.2172/780304.
FOILES, STEPHEN M, & HOYT, JEFFREY J. Computer Simulation of Bubble Growth in Metals Due to He. United States. doi:10.2172/780304.
FOILES, STEPHEN M, and HOYT, JEFFREY J. Thu . "Computer Simulation of Bubble Growth in Metals Due to He". United States. doi:10.2172/780304. https://www.osti.gov/servlets/purl/780304.
@article{osti_780304,
title = {Computer Simulation of Bubble Growth in Metals Due to He},
author = {FOILES, STEPHEN M and HOYT, JEFFREY J},
abstractNote = {Atomistic simulations of the growth of helium bubbles in metals are performed. The metal is represented by embedded atom method potentials for palladium. The helium bubbles are treated via an expanding repulsive spherical potential within the metal lattice. The simulations predict bubble pressures that decrease monotonically with increasing helium to metal ratios. The swelling of the material associated with the bubble growth is also computed. It is found that the rate of swelling increases with increasing helium to metal ratio consistent with experimental observations on the swelling of metal tritides. Finally, the detailed defect structure due to the bubble growth was investigated. Dislocation networks are observed to form that connect the bubbles. Unlike early model assumptions, prismatic loops between the bubbles are not retained. These predictions are compared to available experimental evidence.},
doi = {10.2172/780304},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2001},
month = {3}
}

Technical Report:

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