Collapse of helium-filled voids in extreme deformation: Dislocation mechanisms

Flanagan, Rachel Marie; Meyers, M. A.; Valone, Steven Michael; Fensin, Saryu Jindal

doi:10.1016/j.msea.2022.142712

Title: Collapse of helium-filled voids in extreme deformation: Dislocation mechanisms

Journal Article · 19 January 2022 · Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing

DOI: https://doi.org/10.1016/j.msea.2022.142712 · OSTI ID:1843178

Flanagan, Rachel Marie ^[1]; Meyers, M. A. ^[1]; Valone, Steven Michael ^[2];

^[2]

Univ. of California, San Diego, CA (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

The mechanisms responsible for the collapse of helium-filled bubbles during the passage of shock waves in monocrystalline copper are revealed. Both internal pressure (caused by pre-existing helium atoms) and bubble size are varied in molecular dynamics simulations to understand the atomistic scale deformation as they are subjected to shock compression at pressures of 48, 123, and 170 GPa, corresponding to particle velocities of 1.0, 2.0, and 2.5 km/s. Both empty and helium filled bubbles serve as dislocation sources, generating intense, localized plastic regions. There are distinct differences in the collapse of empty voids compared to He-filled bubbles, the former requiring less stress and generating a greater density of dislocations for a given shock strength. Additionally, a generalized model for dislocation emission is proposed, where the inclusion of shear stress generated by the helium bubble increases the critical stress to generate dislocations at the defect surface, demonstrating the change in plastic deformation.

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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: 89233218CNA000001; NA0003842

OSTI ID:: 1843178

Report Number(s):: LA-UR-21-22183

Journal Information:: Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing, Journal Name: Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing Vol. 839; ISSN 0921-5093

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

References (85)

Helium Implantation Effects on the Compressive Response of Cu Nanopillars Guo, Qiang; Landau, Peri; Hosemann, Peter Small, Vol. 9, Issue 5 https://doi.org/10.1002/smll.201201614	journal	November 2012
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
On the shock compression of polycrystalline metals Bourne, N. K.; Millett, J. C. F.; Gray, G. T. Journal of Materials Science, Vol. 44, Issue 13 https://doi.org/10.1007/s10853-009-3394-y	journal	July 2009
Role of nanoscale Cu/Ta interfaces on the shock compression and spall failure of nanocrystalline Cu/Ta systems at the atomic scales Chen, Jie; Tschopp, Mark A.; Dongare, Avinash M. Journal of Materials Science, Vol. 53, Issue 8 https://doi.org/10.1007/s10853-017-1879-7	journal	December 2017
Effect of microstructural length scales on spall behavior of copper Minich, Roger W.; Cazamias, James U.; Kumar, Mukui Metallurgical and Materials Transactions A, Vol. 35, Issue 9 https://doi.org/10.1007/s11661-004-0212-7	journal	September 2004
A Brief Review of Spall Failure in Pure and Alloyed Magnesium Mallick, D. D.; Williams, C. L.; Wilkerson, J. W. Journal of Dynamic Behavior of Materials https://doi.org/10.1007/s40870-020-00233-z	journal	January 2020
Shock-front irregularities in polycrystalline metals Meyers, M. A.; Carvalho, M. S. Materials Science and Engineering, Vol. 24, Issue 1 https://doi.org/10.1016/0025-5416(76)90102-6	journal	July 1976
Dynamic fracture (spalling) of metals Meyers, Marc André; Taylor Aimone, Catherine Progress in Materials Science, Vol. 28, Issue 1 https://doi.org/10.1016/0079-6425(83)90003-8	journal	January 1983
Dynamic failure of solids Curran, D. Physics Reports, Vol. 147, Issue 5-6 https://doi.org/10.1016/0370-1573(87)90049-4	journal	March 1987
Void growth by dislocation emission Lubarda, V. A.; Schneider, M. S.; Kalantar, D. H. Acta Materialia, Vol. 52, Issue 6 https://doi.org/10.1016/j.actamat.2003.11.022	journal	April 2004
Void growth in metals: Atomistic calculations Traiviratana, Sirirat; Bringa, Eduardo M.; Benson, David J. Acta Materialia, Vol. 56, Issue 15 https://doi.org/10.1016/j.actamat.2008.03.047	journal	September 2008
Void initiation in fcc metals: Effect of loading orientation and nanocrystalline effects Bringa, Eduardo M.; Traiviratana, Sirirat; Meyers, Marc A. Acta Materialia, Vol. 58, Issue 13 https://doi.org/10.1016/j.actamat.2010.04.043	journal	August 2010
Ductile tensile failure in metals through initiation and growth of nanosized voids Tang, Yizhe; Bringa, Eduardo M.; Meyers, Marc A. Acta Materialia, Vol. 60, Issue 12 https://doi.org/10.1016/j.actamat.2012.05.030	journal	July 2012
Laser compression of nanocrystalline tantalum Lu, C. H.; Remington, B. A.; Maddox, B. R. Acta Materialia, Vol. 61, Issue 20 https://doi.org/10.1016/j.actamat.2013.09.016	journal	December 2013
On the ultimate tensile strength of tantalum Hahn, Eric N.; Germann, Timothy C.; Ravelo, Ramon Acta Materialia, Vol. 126 https://doi.org/10.1016/j.actamat.2016.12.033	journal	March 2017
Spall strength dependence on grain size and strain rate in tantalum Remington, T. P.; Hahn, E. N.; Zhao, S. Acta Materialia, Vol. 158 https://doi.org/10.1016/j.actamat.2018.07.048	journal	October 2018
Molecular dynamics study on the nano-void growth in face-centered cubic single crystal copper Zhao, K. J.; Chen, C. Q.; Shen, Y. P. Computational Materials Science, Vol. 46, Issue 3 https://doi.org/10.1016/j.commatsci.2009.04.034	journal	September 2009
Plastic deformation of a porous bcc metal containing nanometer sized voids Ruestes, C. J.; Bringa, E. M.; Stukowski, A. Computational Materials Science, Vol. 88 https://doi.org/10.1016/j.commatsci.2014.02.047	journal	June 2014
Non-equilibrium molecular dynamics simulations of the spallation in Ni: Effect of vacancies Qiu, Tian; Xiong, Yongnan; Xiao, Shifang Computational Materials Science, Vol. 137 https://doi.org/10.1016/j.commatsci.2017.05.039	journal	September 2017
Molecular dynamics simulations of shock-induced plasticity in tantalum Tramontina, Diego; Erhart, Paul; Germann, Timothy High Energy Density Physics, Vol. 10 https://doi.org/10.1016/j.hedp.2013.10.007	journal	March 2014
Shock compression and spall formation in aluminum containing helium bubbles at room temperature and near the melting temperature: Experiments and simulations Glam, B.; Strauss, M.; Eliezer, S. International Journal of Impact Engineering, Vol. 65 https://doi.org/10.1016/j.ijimpeng.2013.10.010	journal	March 2014
Microstructural effects on the spall properties of ECAE-processed AZ31B magnesium alloy Farbaniec, L.; Williams, C. L.; Kecskes, L. International Journal of Impact Engineering, Vol. 98 https://doi.org/10.1016/j.ijimpeng.2016.08.001	journal	December 2016
Emission of dislocations from nanovoids under combined loading Lubarda, Vlado A. International Journal of Plasticity, Vol. 27, Issue 2 https://doi.org/10.1016/j.ijplas.2010.04.005	journal	February 2011
Image force on a straight dislocation emitted from a cylindrical void Lubarda, Vlado A. International Journal of Solids and Structures, Vol. 48, Issue 5 https://doi.org/10.1016/j.ijsolstr.2010.11.006	journal	March 2011
A dynamic void growth model governed by dislocation kinetics Wilkerson, J. W.; Ramesh, K. T. Journal of the Mechanics and Physics of Solids, Vol. 70 https://doi.org/10.1016/j.jmps.2014.05.018	journal	October 2014
A closed-form criterion for dislocation emission in nano-porous materials under arbitrary thermomechanical loading Wilkerson, J. W.; Ramesh, K. T. Journal of the Mechanics and Physics of Solids, Vol. 86 https://doi.org/10.1016/j.jmps.2015.10.005	journal	January 2016
Helium accumulation in metals during irradiation – where do we stand? Trinkaus, H.; Singh, B. N. Journal of Nuclear Materials, Vol. 323, Issue 2-3 https://doi.org/10.1016/j.jnucmat.2003.09.001	journal	December 2003
Helium effects on microstructural evolution in tempered martensitic steels: In situ helium implanter studies in HFIR Yamamoto, T.; Odette, G. R.; Miao, P. Journal of Nuclear Materials, Vol. 386-388 https://doi.org/10.1016/j.jnucmat.2008.12.134	journal	April 2009
Solid solution softening in dislocation-starved Mg–Al alloys Nitol, Mashroor S.; Adibi, Sara; Barrett, Christopher D. Mechanics of Materials, Vol. 150 https://doi.org/10.1016/j.mechmat.2020.103588	journal	November 2020
Grain-size dependent mechanical behavior of nanocrystalline metals Hahn, Eric N.; Meyers, Marc A. Materials Science and Engineering: A, Vol. 646 https://doi.org/10.1016/j.msea.2015.07.075	journal	October 2015
Characterization of spalled AZ31B processed by ECAE Krywopusk, Nicholas M.; Williams, Cyril L.; Kecskes, Laszlo J. Materials Science and Engineering: A, Vol. 767 https://doi.org/10.1016/j.msea.2019.138298	journal	November 2019
Effects of second-phase boron particles on impact response of aluminum Cheng, J. C.; Li, H. Y.; Li, C. Materials Science and Engineering: A, Vol. 793 https://doi.org/10.1016/j.msea.2020.139805	journal	August 2020
Mechanical properties of nanocrystalline materials Meyers, M. A.; Mishra, A.; Benson, D. J. Progress in Materials Science, Vol. 51, Issue 4 https://doi.org/10.1016/j.pmatsci.2005.08.003	journal	May 2006
Deformation twinning in nanocrystalline materials Zhu, Y. T.; Liao, X. Z.; Wu, X. L. Progress in Materials Science, Vol. 57, Issue 1 https://doi.org/10.1016/j.pmatsci.2011.05.001	journal	January 2012
Bubble formation at grain boundaries in helium implanted copper Thorsen, P. A.; Bilde-Sørensen, J. B.; Singh, B. N. Scripta Materialia, Vol. 51, Issue 6 https://doi.org/10.1016/j.scriptamat.2004.05.038	journal	September 2004
Atomistic simulation of the mechanical response of a nanoporous body-centered cubic metal Ruestes, C. J.; Bringa, E. M.; Stukowski, A. Scripta Materialia, Vol. 68, Issue 10 https://doi.org/10.1016/j.scriptamat.2013.01.035	journal	May 2013
Molecular dynamics simulations of ejecta formation in helium-implanted copper Flanagan, R. M.; Hahn, E. N.; Germann, T. C. Scripta Materialia, Vol. 178 https://doi.org/10.1016/j.scriptamat.2019.11.005	journal	March 2020
Defect-Enhanced Structural Relaxation Mechanism for the Evolution of Hot Spots in Rapidly Compressed Crystals Tsai, D. H.; Armstrong, R. W. The Journal of Physical Chemistry, Vol. 98, Issue 43 https://doi.org/10.1021/j100094a001	journal	October 1994
On the nucleation and growth of voids at high strain-rates Belak, J. Journal of Computer-Aided Materials Design, Vol. 5, Issue 2/3, p. 193-206 https://doi.org/10.1023/A:1008685029849	journal	January 1998
Constitutive Equation for the Dynamic Compaction of Ductile Porous Materials Herrmann, W. Journal of Applied Physics, Vol. 40, Issue 6 https://doi.org/10.1063/1.1658021	journal	May 1969
Steady waves in ductile porous solids Carroll, M. M.; Holt, A. C. Journal of Applied Physics, Vol. 44, Issue 10 https://doi.org/10.1063/1.1661970	journal	October 1973
Atomistic modeling of shock-induced void collapse in copper Dávila, L. P.; Erhart, P.; Bringa, E. M. Applied Physics Letters, Vol. 86, Issue 16 https://doi.org/10.1063/1.1906307	journal	April 2005
Spall behavior of aluminum with varying microstructures Chen, X.; Asay, J. R.; Dwivedi, S. K. Journal of Applied Physics, Vol. 99, Issue 2 https://doi.org/10.1063/1.2165409	journal	January 2006
Scaling, Microstructure and Dynamic Fracture Minich, Roger W. SHOCK COMPRESSION OF CONDENSED MATTER - 2005: Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter, AIP Conference Proceedings https://doi.org/10.1063/1.2263404	conference	January 2006
The effect of vacancies on dynamic response of single crystal Cu to shock waves Luo, Sheng-Nian; Germann, Timothy C.; Tonks, Davis L. Journal of Applied Physics, Vol. 107, Issue 5 https://doi.org/10.1063/1.3326941	journal	March 2010
Anisotropic shock response of columnar nanocrystalline Cu Luo, Sheng-Nian; Germann, Timothy C.; Desai, Tapan G. Journal of Applied Physics, Vol. 107, Issue 12 https://doi.org/10.1063/1.3437654	journal	June 2010
Atomic scale studies of spall behavior in nanocrystalline Cu Dongare, Avinash M.; Rajendran, Arunachalam M.; LaMattina, Bruce Journal of Applied Physics, Vol. 108, Issue 11 https://doi.org/10.1063/1.3517827	journal	December 2010
Spallation model for the high strain rates range Dekel, E.; Eliezer, S.; Henis, Z. Journal of Applied Physics, Vol. 84, Issue 9 https://doi.org/10.1063/1.368727	journal	November 1998
Influence of grain boundary properties on spall strength: Grain boundary energy and excess volume Fensin, S. J.; Valone, S. M.; Cerreta, E. K. Journal of Applied Physics, Vol. 112, Issue 8 https://doi.org/10.1063/1.4761816	journal	October 2012
Analysis of deformation twinning in tantalum single crystals under shock loading conditions Florando, Jeffrey N.; Barton, Nathan R.; El-Dasher, Bassem S. Journal of Applied Physics, Vol. 113, Issue 8 https://doi.org/10.1063/1.4792227	journal	February 2013
The role of cold work on the shock response of tantalum Millett, J. C. F.; Whiteman, G.; Park, N. T. Journal of Applied Physics, Vol. 113, Issue 23 https://doi.org/10.1063/1.4810896	journal	June 2013
Dynamic damage nucleation and evolution in multiphase materials Fensin, S. J.; Escobedo, J. P.; Gray, G. T. Journal of Applied Physics, Vol. 115, Issue 20 https://doi.org/10.1063/1.4880435	journal	May 2014
Shock response of He bubbles in single crystal Cu Li, B.; Wang, L.; E., J. C. Journal of Applied Physics, Vol. 116, Issue 21 https://doi.org/10.1063/1.4903732	journal	December 2014
Yield stress, polymorphic transformation, and spall fracture of shock-loaded iron in various structural states and at various temperatures Zaretsky, E. B.; Kanel, G. I. Journal of Applied Physics, Vol. 117, Issue 19 https://doi.org/10.1063/1.4921356	journal	May 2015
Dislocation evolution and peak spall strengths in single crystal and nanocrystalline Cu Mackenchery, Karoon; Valisetty, Ramakrishna R.; Namburu, Raju R. Journal of Applied Physics, Vol. 119, Issue 4 https://doi.org/10.1063/1.4939867	journal	January 2016
The α–ω phase transition in shock-loaded titanium Jones, David R.; Morrow, Benjamin M.; Trujillo, Carl P. Journal of Applied Physics, Vol. 122, Issue 4 https://doi.org/10.1063/1.4987146	journal	July 2017
Effects of interfacial bonding on spallation in metal-matrix composites Hixson, R. S.; Johnson, J. N.; Gray, G. T. Proceedings of the conference of the American Physical Society topical group on shock compression of condensed matter, AIP Conference Proceedings https://doi.org/10.1063/1.50872	conference	January 1996
Influence of defects on the shock Hugoniot of tantalum Hahn, Eric N.; Fensin, Saryu J. Journal of Applied Physics, Vol. 125, Issue 21 https://doi.org/10.1063/1.5096526	journal	June 2019
Atomistic modelling of the plastic deformation of helium bubbles and voids in aluminium under shock compression Wang, Hai-Yan; Li, Xu-Sheng; Zhu, Wen-Jun Radiation Effects and Defects in Solids, Vol. 169, Issue 2 https://doi.org/10.1080/10420150.2013.848449	journal	October 2013
The observation of vacancy sources in metals Barnes, R. S.; Redding, G. B.; Cottrbll, A. H. Philosophical Magazine, Vol. 3, Issue 25 https://doi.org/10.1080/14786435808243230	journal	January 1958
The interaction of shocks and defects in Lennard-Jones crystals Phillips, L.; Sinkovits, R. S.; Oran, E. S. Journal of Physics: Condensed Matter, Vol. 5, Issue 35 https://doi.org/10.1088/0953-8984/5/35/003	journal	August 1993
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
A predictive interatomic potential for He in Cu and Nb Kashinath, A.; Demkowicz, M. J. Modelling and Simulation in Materials Science and Engineering, Vol. 19, Issue 3 https://doi.org/10.1088/0965-0393/19/3/035007	journal	March 2011
Automated identification and indexing of dislocations in crystal interfaces Stukowski, Alexander; Bulatov, Vasily V.; Arsenlis, Athanasios Modelling and Simulation in Materials Science and Engineering, Vol. 20, Issue 8 https://doi.org/10.1088/0965-0393/20/8/085007	journal	October 2012
Molecular dynamics simulation of the initial stages of He bubbles formation in silicon Pizzagalli, L.; David, M. L.; Bertolus, M. Modelling and Simulation in Materials Science and Engineering, Vol. 21, Issue 6 https://doi.org/10.1088/0965-0393/21/6/065002	journal	July 2013
Effects of orientation and vacancy defects on the shock Hugoniot behavior and spallation of single-crystal copper Lin, Enqiang; Shi, Huiji; Niu, Lisha Modelling and Simulation in Materials Science and Engineering, Vol. 22, Issue 3 https://doi.org/10.1088/0965-0393/22/3/035012	journal	March 2014
Using growth and arrest of Richtmyer-Meshkov instabilities and Lagrangian simulations to study high-rate material strength Prime, M. B.; Vaughan, D. E.; Preston, D. L. Journal of Physics: Conference Series, Vol. 500, Issue 11 https://doi.org/10.1088/1742-6596/500/11/112051	journal	May 2014
Equation of state and melting properties of He 4 from measurements to 20 kbar Mills, R. L.; Liebenberg, D. H.; Bronson, J. C. Physical Review B, Vol. 21, Issue 11 https://doi.org/10.1103/PhysRevB.21.5137	journal	June 1980
Molecular-dynamics simulations of void collapse in shocked model-molecular solids Mintmire, J. W.; Robertson, D. H.; White, C. T. Physical Review B, Vol. 49, Issue 21 https://doi.org/10.1103/PhysRevB.49.14859	journal	June 1994
He-vacancy interactions in Si and their influence on bubble formation and evolution Raineri, V.; Coffa, S.; Szilágyi, E. Physical Review B, Vol. 61, Issue 2 https://doi.org/10.1103/PhysRevB.61.937	journal	January 2000
Critical behavior in spallation failure of metals Strachan, Alejandro; Çağın, Tahir; Goddard, William A. Physical Review B, Vol. 63, Issue 6 https://doi.org/10.1103/PhysRevB.63.060103	journal	January 2001
Effect of stress triaxiality on void growth in dynamic fracture of metals: A molecular dynamics study Seppälä, E. T.; Belak, J.; Rudd, R. E. Physical Review B, Vol. 69, Issue 13 https://doi.org/10.1103/PhysRevB.69.134101	journal	April 2004
Atomistic mechanism of shock-induced void collapse in nanoporous metals Erhart, Paul; Bringa, Eduardo M.; Kumar, Mukul Physical Review B, Vol. 72, Issue 5 https://doi.org/10.1103/PhysRevB.72.052104	journal	August 2005
Effects of the α − ε phase transition on wave propagation and spallation in laser shock-loaded iron de Rességuier, Thibaut; Hallouin, Martine Physical Review B, Vol. 77, Issue 17 https://doi.org/10.1103/PhysRevB.77.174107	journal	May 2008
Atomic scale simulations of ductile failure micromechanisms in nanocrystalline Cu at high strain rates Dongare, Avinash M.; Rajendran, Arunachalam M.; LaMattina, Bruce Physical Review B, Vol. 80, Issue 10 https://doi.org/10.1103/PhysRevB.80.104108	journal	September 2009
Coupling between plasticity and phase transition in shock- and ramp-compressed single-crystal iron Amadou, N.; de Resseguier, T.; Dragon, A. Physical Review B, Vol. 98, Issue 2 https://doi.org/10.1103/PhysRevB.98.024104	journal	July 2018
Atomistic Mechanism for Hot Spot Initiation Holian, Brad Lee; Germann, Timothy C.; Maillet, Jean-Bernard Physical Review Letters, Vol. 89, Issue 28 https://doi.org/10.1103/PhysRevLett.89.285501	journal	December 2002
Spatiotemporal Behavior of Void Collapse in Shocked Solids Hatano, Takahiro Physical Review Letters, Vol. 92, Issue 1 https://doi.org/10.1103/PhysRevLett.92.015503	journal	January 2004
Dislocation Nucleation in Shocked fcc Solids: Effects of Temperature and Preexisting Voids Hatano, Takahiro Physical Review Letters, Vol. 93, Issue 8 https://doi.org/10.1103/PhysRevLett.93.085501	journal	August 2004
A Maximum in the Strength of Nanocrystalline Copper Schiotz, J. Science, Vol. 301, Issue 5638 https://doi.org/10.1126/science.1086636	journal	September 2003
Ultrahigh Strength in Nanocrystalline Materials Under Shock Loading Bringa, E. M. Science, Vol. 309, Issue 5742 https://doi.org/10.1126/science.1116723	journal	September 2005
Plasticity Induced by Shock Waves in Nonequilibrium Molecular-Dynamics Simulations Holian, B. L. Science, Vol. 280, Issue 5372 https://doi.org/10.1126/science.280.5372.2085	journal	June 1998
High-Strain-Rate Deformation: Mechanical Behavior and Deformation Substructures Induced (Rusty) Gray, George T. Annual Review of Materials Research, Vol. 42, Issue 1 https://doi.org/10.1146/annurev-matsci-070511-155034	journal	August 2012
Helium Nano-Bubble Evolution in Aging Metal Tritides Cowgill, Donald F. Fusion Science and Technology, Vol. 48, Issue 1 https://doi.org/10.13182/FST48-539	journal	August 2005
The Role of Helium on Ejecta Production in Copper Fensin, Saryu; Jones, David; Martinez, Daniel Materials, Vol. 13, Issue 6 https://doi.org/10.3390/ma13061270	journal	March 2020

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