Experimental characterization and constitutive modeling of the mechanical behavior of molybdenum under electromagnetically applied compression-shear ramp loading

Alexander, C. Scott; Ding, Jow -Lian; Asay, James Russell

doi:10.1063/1.4943496

Title: Experimental characterization and constitutive modeling of the mechanical behavior of molybdenum under electromagnetically applied compression-shear ramp loading

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Abstract

Magnetically applied pressure-shear (MAPS) is a new experimental technique that provides a platform for direct measurement of material strength at extreme pressures. The technique employs an imposed quasi-static magnetic field and a pulsed power generator that produces an intense current on a planar driver panel, which in turn generates high amplitude magnetically induced longitudinal compression and transverse shear waves into a planar sample mounted on the drive panel. In order to apply sufficiently high shear traction to the test sample, a high strength material must be used for the drive panel. Molybdenum is a potential driver material for the MAPS experiment because of its high yield strength and sufficient electrical conductivity. To properly interpret the results and gain useful information from the experiments, it is critical to have a good understanding and a predictive capability of the mechanical response of the driver. In this work, the inelastic behavior of molybdenum under uniaxial compression and biaxial compression-shear ramp loading conditions is experimentally characterized. It is observed that an imposed uniaxial magnetic field ramped to approximately 10 T through a period of approximately 2500 μs and held near the peak for about 250 μs before being tested appears to anneal the molybdenummore »« less

Authors:

Alexander, C. Scott ^[1]; Ding, Jow -Lian ^[2]; Asay, James Russell ^[3]

Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Washington State Univ., Pullman, WA (United States)
Peralta, NM (United States)

Publication Date:: Wed Mar 09 00:00:00 EST 2016

Research Org.:: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Sandia National Lab. (SNL-CA), Livermore, CA (United States)

Sponsoring Org.:: USDOE National Nuclear Security Administration (NNSA)

OSTI Identifier:: 1251628

Alternate Identifier(s):: OSTI ID: 1241417; OSTI ID: 1333850

Report Number(s):: SAND-2015-11043J; SAND-2015-0844J
Journal ID: ISSN 0021-8979; JAPIAU; 617368

Grant/Contract Number:: AC04-94AL85000

Resource Type:: Accepted Manuscript

Journal Name:: Journal of Applied Physics

Additional Journal Information:: Journal Volume: 119; Journal Issue: 10; Journal ID: ISSN 0021-8979

Publisher:: American Institute of Physics (AIP)

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; molybdenum; magnetic fields; stress strain relations; aluminum; materials behavior; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats


                    Alexander, C. Scott, Ding, Jow -Lian, and Asay, James Russell. Experimental characterization and constitutive modeling of the mechanical behavior of molybdenum under electromagnetically applied compression-shear ramp loading.  United States: N. p., 2016. 
Web.  doi:10.1063/1.4943496.

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                    Alexander, C. Scott, Ding, Jow -Lian, & Asay, James Russell. Experimental characterization and constitutive modeling of the mechanical behavior of molybdenum under electromagnetically applied compression-shear ramp loading.  United States.  https://doi.org/10.1063/1.4943496

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                    Alexander, C. Scott, Ding, Jow -Lian, and Asay, James Russell. Wed .  
"Experimental characterization and constitutive modeling of the mechanical behavior of molybdenum under electromagnetically applied compression-shear ramp loading".  United States.  https://doi.org/10.1063/1.4943496.  https://www.osti.gov/servlets/purl/1251628.

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@article{osti_1251628,

  title        = {Experimental characterization and constitutive modeling of the mechanical behavior of molybdenum under electromagnetically applied compression-shear ramp loading},

  author       = {Alexander, C. Scott and Ding, Jow -Lian and Asay, James Russell},

  abstractNote = {Magnetically applied pressure-shear (MAPS) is a new experimental technique that provides a platform for direct measurement of material strength at extreme pressures. The technique employs an imposed quasi-static magnetic field and a pulsed power generator that produces an intense current on a planar driver panel, which in turn generates high amplitude magnetically induced longitudinal compression and transverse shear waves into a planar sample mounted on the drive panel. In order to apply sufficiently high shear traction to the test sample, a high strength material must be used for the drive panel. Molybdenum is a potential driver material for the MAPS experiment because of its high yield strength and sufficient electrical conductivity. To properly interpret the results and gain useful information from the experiments, it is critical to have a good understanding and a predictive capability of the mechanical response of the driver. In this work, the inelastic behavior of molybdenum under uniaxial compression and biaxial compression-shear ramp loading conditions is experimentally characterized. It is observed that an imposed uniaxial magnetic field ramped to approximately 10 T through a period of approximately 2500 μs and held near the peak for about 250 μs before being tested appears to anneal the molybdenum panel. In order to provide a physical basis for model development, a general theoretical framework that incorporates electromagnetic loading and the coupling between the imposed field and the inelasticity of molybdenum was developed. Based on this framework, a multi-axial continuum model for molybdenum under electromagnetic loading is presented. The model reasonably captures all of the material characteristics displayed by the experimental data obtained from various experimental configurations. Additionally, data generated from shear loading provide invaluable information not only for validating but also for guiding the development of the material model for multiaxial loadings.},

  doi          = {10.1063/1.4943496},

  journal      = {Journal of Applied Physics},

  number       = 10,

  volume       = 119,

  place        = {United States},

  year         = {Wed Mar 09 00:00:00 EST 2016},

  month        = {Wed Mar 09 00:00:00 EST 2016}

}

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