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The effect of stress on the migration of He gas bubbles under a thermal gradient in Fe by phase-field modeling

Journal Article · · Computational Materials Science
 [1];  [2];  [2];  [2]
  1. University of Florida, Gainesville, FL (United States); Nanjing University of Science and Technology (China); OSTI
  2. University of Florida, Gainesville, FL (United States)

Here a phase-field model is parameterized to study the effect of elastic stresses on the migration of He gas bubbles in Fe under a temperature gradient. Stresses caused by the gas bubble pressure and residual stress in the Fe matrix are considered. The dependence of He bubble migration velocity on the magnitude of the residual stress, average temperature, temperature gradient, and bubble size is measured. In agreement with a theoretical model based on surface diffusion, simulation results demonstrate that He bubbles move towards the high temperature region with velocities in Fe that are orders of magnitude faster than previously reported in UO2. It is found that local stresses in the matrix caused by the He bubble have negligible effect on the bubble migration process; however, residual stresses in the Fe matrix, potentially caused by processing or irradiation, can modestly modify bubble kinetics through pressure dependence of the He diffusion coefficients. Compressive residual stress decreases diffusion coefficients for bulk and surface diffusion mechanisms, thus reducing the migration velocity of the gas bubble. In contrast, tensile residual stress increases the diffusion coefficients, resulting in an increase in the gas bubble migration velocity. This pressure dependence is also consistent with a theoretical model. This phase field model lays the foundation for analysis of bubble coalescence-induced fracture in He bubble-containing steels.

Research Organization:
University of Florida, Gainesville, FL (United States)
Sponsoring Organization:
USDOE Office of Nuclear Energy (NE), Nuclear Energy University Program (NEUP); University of Florida
Grant/Contract Number:
NE0008883
OSTI ID:
1977006
Journal Information:
Computational Materials Science, Journal Name: Computational Materials Science Journal Issue: C Vol. 209; ISSN 0927-0256
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (65)

Three-dimensional phase field simulation of intragranular void formation and thermal conductivity in irradiated α-Fe journal May 2018
On spinodal decomposition journal September 1961
The kinetics of pore movement in UO2 fuel rods journal June 1972
On the thermal gradient migration of lenticular voids journal October 1979
Nucleation of helium bubbles on dislocations, dislocation networks and dislocations in grain boundaries during 600 MeV proton irradiation of aluminium journal August 1984
High temperature embrittlement of metals due to helium: is the lifetime dominated by cavity growth or crack growth? journal September 1994
Formation and migration of helium bubbles in Fe and Fe–9Cr ferritic alloy journal December 2002
Weldability of neutron irradiated austenitic stainless steels journal January 1999
Phase-field simulation of void migration in a temperature gradient journal May 2010
A molecular dynamics simulation of self-diffusion on Fe surfaces journal March 2012
A temperature-dependent surface free energy model for solid single crystals journal January 2017
Assessments of molar volume and thermal expansion for selected bcc, fcc and hcp metallic elements journal March 2005
An introduction to phase-field modeling of microstructure evolution journal June 2008
Diffusion of a vacancy on Fe(1 0 0): A molecular-dynamics study journal February 2009
Phase-field modeling of temperature gradient driven pore migration coupling with thermal conduction journal April 2012
The formation energy and bonding characteristics of small helium–vacancy clusters on the low-index surface of α-Fe by first principles calculations journal September 2014
A quantitative phase-field model for two-phase elastically inhomogeneous systems journal March 2015
Rapid multiphase-field model development using a modular free energy based approach with automatic differentiation in MOOSE/MARMOT journal May 2017
Quantifying elastic energy effects on interfacial energy in the Kim-Kim-Suzuki phase-field model with different interpolation schemes journal December 2017
How to apply the phase field method to model radiation damage journal May 2018
Phase field study the effects of interfacial energy anisotropy on the thermal migration of voids journal March 2019
Phase-field modeling of fission gas bubble growth on grain boundaries and triple junctions in UO2 nuclear fuel journal April 2019
The effects of introducing elasticity using different interpolation schemes to the grand potential phase field model journal October 2020
A phase field study of the thermal migration of gas bubbles in UO2 nuclear fuel under temperature gradient journal October 2020
A quantitative phase-field model of gas bubble evolution in UO2 journal November 2020
Helium accumulation in metals during irradiation – where do we stand? journal December 2003
Ferritic/martensitic steels for next-generation reactors journal September 2007
Phase-field modeling of gas bubbles and thermal conductivity evolution in nuclear fuels journal July 2009
Study by EELS of helium bubbles in a martensitic steel journal August 2009
Phase-field modeling of void migration and growth kinetics in materials under irradiation and temperature field journal December 2010
A new Fe–He interatomic potential based on ab initio calculations in α-Fe journal November 2011
Properties of Helium bubbles in Fe and FeCr alloys journal November 2011
Radiation damage in helium ion irradiated nanocrystalline Fe journal June 2012
Diffusion of small He clusters in bulk and grain boundaries in α-Fe journal November 2013
He-induced vacancy formation in bcc Fe solid from first-principles simulation journal January 2014
The role of grain size in He bubble formation: Implications for swelling resistance journal February 2017
Phase-field simulations of pore migration and morphology change in thermal gradients journal July 2017
Effects of temperature on helium bubble behaviour in Fe–9Cr alloy journal April 2020
Phase-field simulations of intergranular fission gas bubble behavior in U3Si2 nuclear fuel journal December 2020
Phase-field simulations of fission gas bubbles in high burnup UO2 during steady-state and LOCA transient conditions journal December 2021
Microstructure and microchemistry of laser welds of irradiated austenitic steels journal August 2021
Phase-field simulations of intragranular fission gas bubble evolution in UO2 under post-irradiation thermal annealing journal May 2013
MOOSE: A parallel computational framework for coupled systems of nonlinear equations journal October 2009
Effect of stress on self-diffusion in bcc Fe: An atomistic simulation study journal July 2010
Size and mechanics effects in surface-induced melting of nanoparticles journal April 2011
Atomic transport properties in UO2 and mixed oxides (U, Pu)O2 journal January 1987
Phase field microelasticity theory and simulation of multiple voids and cracks in single crystals and polycrystals under applied stress journal January 2002
Elastic constants of monocrystal iron from 3 to 500 K journal January 2006
Binding energetics of substitutional and interstitial helium and di-helium defects with grain boundary structure in α-Fe journal January 2014
Phase-field study on geometry-dependent migration behavior of voids under temperature gradient in UO 2 crystal matrix journal October 2017
Heat transfer and fluid flow during laser spot welding of 304 stainless steel journal May 2003
Heat transfer and fluid flow during keyhole mode laser welding of tantalum, Ti–6Al–4V, 304L stainless steel and vanadium journal August 2007
The influence of helium on the bulk properties of fusion reactor structural materials journal August 1984
Molecular dynamics simulations of grain boundary mobility in Al, Cu and γ -Fe using a symmetrical driving force journal May 2014
Ab initio study of helium in α − Fe : Dissolution, migration, and clustering with vacancies journal August 2005
Molecular dynamics study of self-diffusion in bcc Fe journal October 2009
Unified derivation of phase-field models for alloy solidification from a grand-potential functional journal September 2011
Grand-potential-based phase-field model for multiple phases, grains, and chemical components journal August 2018
Stability and Mobility of Mono- and Di-Interstitials in α -Fe journal April 2004
The Soret Effect: A Review of Recent Experimental Results journal April 2005
Thermal Physics, 2nd ed. journal February 1998
Designing Radiation Resistance in Materials for Fusion Energy journal July 2014
Welding residual stresses in ferritic power plant steels journal September 2007
Combining phase field approach and homogenization methods for modelling phase transformation in elastoplastic media journal January 2009
Molecular Dynamics Calculations of Grain Boundary Mobility in CdTe journal April 2019

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