Elastic moduli of $\delta$-Pu239 reveal aging in real time

Maiorov, Boris Alfredo; Betts, Jonathan Bobby; Soderlind, Per; Landa, Alexander; Hernandez, Sarah Christine; Saleh, Tarik A.; Freibert, Franz Joseph; Migliori, Albert

doi:10.1063/1.4978509

Title: Elastic moduli of $$\delta$$-Pu²³⁹ reveal aging in real time

Abstract

We study the time evolution (aging) of the elastic moduli of an eight-year-old polycrystalline δ- Pu 2.0 at % Ga alloy (δ-Pu:Ga ) from 295K to nearly 500K in real time using Resonant Ultrasound Spectroscopy (RUS). After 8 years of aging at 295K, the bulk and shear moduli increase at a normalized rate of 0.2%/year and 0.6%/year respectively. As the temperature is raised, two time dependences are observed, an exponential one of about a week, followed by a linear one (constant rate). The linear rate is thermally activated with an activation energy of 0.33+0.06 eV. Above 420K a qualitative change in the time evolution is observed; the bulk modulus decreases with time while the shear modulus continues to stiffen. No change is observed as the α-β transition temperature is crossed as would be expected if a decomposition of δ-Pu:Ga to α-Pu and Pu₃Ga occurred over the temperature range studied. Our results indicate that the main mechanism of aging is creation of defects that are partially annealed starting at T = 420 K.

Authors:

^[1];

^[1]; Soderlind, Per ^[2]; Landa, Alexander ^[2];

^[1];

^[1]; Migliori, Albert ^[1]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Publication Date:: Fri Mar 24 00:00:00 EDT 2017

Research Org.:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Energy Frontier Research Centers (EFRC) (United States). Materials Science of Actinides (MSA); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Org.:: USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1352421

Alternate Identifier(s):: OSTI ID: 1349003; OSTI ID: 1349383

Report Number(s):: LA-UR-16-28430; LLNL-JRNL-712781
Journal ID: ISSN 0021-8979; TRN: US1700582

Grant/Contract Number:: AC52-06NA25396; SC0001089; AC52-07NA27344

Resource Type:: Journal Article: Accepted Manuscript

Journal Name:: Journal of Applied Physics

Additional Journal Information:: Journal Volume: 121; Journal Issue: 12; Journal ID: ISSN 0021-8979

Publisher:: American Institute of Physics (AIP)

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; Plutonium aging elastic constants; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats


                    Maiorov, Boris Alfredo, Betts, Jonathan Bobby, Soderlind, Per, Landa, Alexander, Hernandez, Sarah Christine, Saleh, Tarik A., Freibert, Franz Joseph, and Migliori, Albert. Elastic moduli of $\delta$-Pu239 reveal aging in real time.  United States: N. p., 2017. 
        Web.  doi:10.1063/1.4978509.

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                    Maiorov, Boris Alfredo, Betts, Jonathan Bobby, Soderlind, Per, Landa, Alexander, Hernandez, Sarah Christine, Saleh, Tarik A., Freibert, Franz Joseph, & Migliori, Albert. Elastic moduli of $\delta$-Pu239 reveal aging in real time.  United States.  https://doi.org/10.1063/1.4978509

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                    Maiorov, Boris Alfredo, Betts, Jonathan Bobby, Soderlind, Per, Landa, Alexander, Hernandez, Sarah Christine, Saleh, Tarik A., Freibert, Franz Joseph, and Migliori, Albert. 2017.  
        "Elastic moduli of $\delta$-Pu239 reveal aging in real time".  United States.  https://doi.org/10.1063/1.4978509.  https://www.osti.gov/servlets/purl/1352421.

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@article{osti_1352421,

  title        = {Elastic moduli of $\delta$-Pu239 reveal aging in real time},

  author       = {Maiorov, Boris Alfredo and Betts, Jonathan Bobby and Soderlind, Per and Landa, Alexander and Hernandez, Sarah Christine and Saleh, Tarik A. and Freibert, Franz Joseph and Migliori, Albert},

  abstractNote = {We study the time evolution (aging) of the elastic moduli of an eight-year-old polycrystalline δ- Pu 2.0 at % Ga alloy (δ-Pu:Ga ) from 295K to nearly 500K in real time using Resonant Ultrasound Spectroscopy (RUS). After 8 years of aging at 295K, the bulk and shear moduli increase at a normalized rate of 0.2%/year and 0.6%/year respectively. As the temperature is raised, two time dependences are observed, an exponential one of about a week, followed by a linear one (constant rate). The linear rate is thermally activated with an activation energy of 0.33+0.06 eV. Above 420K a qualitative change in the time evolution is observed; the bulk modulus decreases with time while the shear modulus continues to stiffen. No change is observed as the α-β transition temperature is crossed as would be expected if a decomposition of δ-Pu:Ga to α-Pu and Pu3Ga occurred over the temperature range studied. Our results indicate that the main mechanism of aging is creation of defects that are partially annealed starting at T = 420 K.},

  doi          = {10.1063/1.4978509},

  url          = {https://www.osti.gov/biblio/1352421},
  journal      = {Journal of Applied Physics},

  issn         = {0021-8979},

  number       = 12,

  volume       = 121,

  place        = {United States},

  year         = {Fri Mar 24 00:00:00 EDT 2017},

  month        = {Fri Mar 24 00:00:00 EDT 2017}

}

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Similar Records

Title: Elastic moduli of $$\delta$$-Pu239 reveal aging in real time

Abstract

Citation Formats

The Elastic Constants of a Solid containing Spherical Holes journal, January 1950

Temperature dependence of elastic moduli of polycrystalline β plutonium journal, August 2011

Temperature and time-dependence of the elastic moduli of Pu and Pu–Ga alloys journal, October 2007

Elastic properties of face-centered-cubic plutonium journal, October 1976

Reversible expansion of gallium-stabilized δ-plutonium journal, December 2006

The annealing kinetics of plutonium-1 weight percent gallium journal, November 1973

Isochronal annealing effects on local structure, crystalline fraction, and undamaged region size of radiation damage in Ga-stabilized δ -Pu journal, July 2016

Implementation of a modern resonant ultrasound spectroscopy system for the measurement of the elastic moduli of small solid specimens journal, December 2005

Formation and recovery of irradiation and mechanical damage in stabilized δ-plutonium alloys journal, October 2007

Plutonium metallurgy: The materials science challenges bridging condensed-matter physics and chemistry journal, October 2007

Elastic properties of Pu metal and Pu-Ga alloys journal, June 2010

The recovery of electrical resistivity in Plutonium-1 wt.% gallium after plastic deformation journal, August 1969

Effects of thermal-neutron irradiation on the elastic constants of copper journal, July 1974

Elastic Properties of Metals and Alloys, I. Iron, Nickel, and Iron‐Nickel Alloys journal, July 1973

Recovery of yield stress in Pu-1 wt % Ga journal, August 1965

Phase transformations in Pu–Ga and Pu–Al alloys journal, October 2007

Poisson's ratio of porous and microcracked solids: Theory and application to oxide superconductors journal, November 1995

Temperature-dependent defect properties from ion-irradiation in Pu(Ga) journal, April 2004

Lattice defects and the electrical resistivity of metals journal, January 1954

Diffusion in stabilized delta plutonium, I. Gallium journal, March 1968

Diaelastic modulus change of aluminium after low temperature electron irradiation journal, March 1976

Defect evolution in single crystalline tungsten following low temperature and low dose neutron irradiation journal, March 2016

Spectroscopic Signature of Aging in δ-Pu(Ga) journal, May 2006

Phase stability of α′-phase in a Pu-1at% Ga alloy following low temperature treatment journal, October 2014

Emergent magnetic moments produced by self-damage in plutonium journal, November 2006

Designing Radiation Resistance in Materials for Fusion Energy journal, July 2014

Title: Elastic moduli of $$\delta$$-Pu²³⁹ reveal aging in real time

The Elastic Constants of a Solid containing Spherical Holes
journal, January 1950

Temperature dependence of elastic moduli of polycrystalline β plutonium
journal, August 2011

Temperature and time-dependence of the elastic moduli of Pu and Pu–Ga alloys
journal, October 2007

Elastic properties of face-centered-cubic plutonium
journal, October 1976

Reversible expansion of gallium-stabilized δ-plutonium
journal, December 2006

The annealing kinetics of plutonium-1 weight percent gallium
journal, November 1973

Isochronal annealing effects on local structure, crystalline fraction, and undamaged region size of radiation damage in Ga-stabilized δ -Pu
journal, July 2016

Implementation of a modern resonant ultrasound spectroscopy system for the measurement of the elastic moduli of small solid specimens
journal, December 2005

Formation and recovery of irradiation and mechanical damage in stabilized δ-plutonium alloys
journal, October 2007

Plutonium metallurgy: The materials science challenges bridging condensed-matter physics and chemistry
journal, October 2007

Elastic properties of Pu metal and Pu-Ga alloys
journal, June 2010

The recovery of electrical resistivity in Plutonium-1 wt.% gallium after plastic deformation
journal, August 1969

Effects of thermal-neutron irradiation on the elastic constants of copper
journal, July 1974

Elastic Properties of Metals and Alloys, I. Iron, Nickel, and Iron‐Nickel Alloys
journal, July 1973

Recovery of yield stress in Pu-1 wt % Ga
journal, August 1965

Phase transformations in Pu–Ga and Pu–Al alloys
journal, October 2007

Poisson's ratio of porous and microcracked solids: Theory and application to oxide superconductors
journal, November 1995

Temperature-dependent defect properties from ion-irradiation in Pu(Ga)
journal, April 2004

Lattice defects and the electrical resistivity of metals
journal, January 1954

Diffusion in stabilized delta plutonium, I. Gallium
journal, March 1968

Diaelastic modulus change of aluminium after low temperature electron irradiation
journal, March 1976

Defect evolution in single crystalline tungsten following low temperature and low dose neutron irradiation
journal, March 2016

Spectroscopic Signature of Aging in δ-Pu(Ga)
journal, May 2006

Phase stability of α′-phase in a Pu-1at% Ga alloy following low temperature treatment
journal, October 2014

Emergent magnetic moments produced by self-damage in plutonium
journal, November 2006

Designing Radiation Resistance in Materials for Fusion Energy
journal, July 2014