Crystal Viscoplasticity Model of Molybdenum Including the Influence of Silicon in Solid Solution [Crystal Viscoplasticity Model of Mo Including the Influence of Si in Solid Solution]

Brindley, Kyle Andrew; Neu, Richard W.

doi:10.1520/MPC20190040

Title: Crystal Viscoplasticity Model of Molybdenum Including the Influence of Silicon in Solid Solution [Crystal Viscoplasticity Model of Mo Including the Influence of Si in Solid Solution]

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Abstract

Molybdenum (Mo)-based alloys offer higher temperature capability than nickel-based superalloys. The challenge of designing these alloys is tailoring the chemistry and microstructure to achieve high-temperature strength, creep and fatigue resistance, and oxidation resistance while maintaining lower-temperature ductility and damage tolerance. Structure-properties modeling tools can be used to identify optimum microstructures. However, one missing element in this tool set is a constitutive model for the more ductile α-Mo phase over the entire temperature range from room temperature to 1,400°C. A crystal viscoplasticity model is developed for α-Mo, including the influence of varying amounts of silicon (Si) in solid solution. As a result, the temperature, strain rate, and Si dependence of the deformation behavior needed to determine the model parameters are obtained from new compression experiments.

Authors:

^[1];

^[1]

Georgia Inst. of Technology, Atlanta, GA (United States)

Publication Date:: Tue Jan 01 00:00:00 EST 2019

Research Org.:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Org.:: Universities/Institutions; USDOE

OSTI Identifier:: 1542817

Report Number(s):: LA-UR-18-21658
Journal ID: ISSN 2379-1365; MPCACD

Grant/Contract Number:: 89233218CNA000001

Resource Type:: Accepted Manuscript

Journal Name:: Materials Performance and Characterization

Additional Journal Information:: Journal Volume: 8; Journal Issue: 1; Journal ID: ISSN 2379-1365

Publisher:: ASTM International

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; ICME; Intermetallics; Plasticity; constitutive model

Citation Formats


                    Brindley, Kyle Andrew, and Neu, Richard W. Crystal Viscoplasticity Model of Molybdenum Including the Influence of Silicon in Solid Solution [Crystal Viscoplasticity Model of Mo Including the Influence of Si in Solid Solution].  United States: N. p., 2019. 
Web.  doi:10.1520/MPC20190040.

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                    Brindley, Kyle Andrew, & Neu, Richard W. Crystal Viscoplasticity Model of Molybdenum Including the Influence of Silicon in Solid Solution [Crystal Viscoplasticity Model of Mo Including the Influence of Si in Solid Solution].  United States.  https://doi.org/10.1520/MPC20190040

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                    Brindley, Kyle Andrew, and Neu, Richard W. Tue .  
"Crystal Viscoplasticity Model of Molybdenum Including the Influence of Silicon in Solid Solution [Crystal Viscoplasticity Model of Mo Including the Influence of Si in Solid Solution]".  United States.  https://doi.org/10.1520/MPC20190040.  https://www.osti.gov/servlets/purl/1542817.

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@article{osti_1542817,

  title        = {Crystal Viscoplasticity Model of Molybdenum Including the Influence of Silicon in Solid Solution [Crystal Viscoplasticity Model of Mo Including the Influence of Si in Solid Solution]},

  author       = {Brindley, Kyle Andrew and Neu, Richard W.},

  abstractNote = {Molybdenum (Mo)-based alloys offer higher temperature capability than nickel-based superalloys. The challenge of designing these alloys is tailoring the chemistry and microstructure to achieve high-temperature strength, creep and fatigue resistance, and oxidation resistance while maintaining lower-temperature ductility and damage tolerance. Structure-properties modeling tools can be used to identify optimum microstructures. However, one missing element in this tool set is a constitutive model for the more ductile α-Mo phase over the entire temperature range from room temperature to 1,400°C. A crystal viscoplasticity model is developed for α-Mo, including the influence of varying amounts of silicon (Si) in solid solution. As a result, the temperature, strain rate, and Si dependence of the deformation behavior needed to determine the model parameters are obtained from new compression experiments.},

  doi          = {10.1520/MPC20190040},

  journal      = {Materials Performance and Characterization},

  number       = 1,

  volume       = 8,

  place        = {United States},

  year         = {Tue Jan 01 00:00:00 EST 2019},

  month        = {Tue Jan 01 00:00:00 EST 2019}

}

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