Transient solute drag and strain aging of dislocations

Epperly, E. N.; Sills, R. B.

doi:10.1016/j.actamat.2020.03.031

Title: Transient solute drag and strain aging of dislocations

Abstract

The transient drag force exerted by mobile solutes on a moving dislocation is computed using continuum theory. These mobile solutes form so-called Cottrell atmospheres around dislocations during static and dynamic strain aging. We evaluate the evolution of the drag force exerted by the atmosphere under two velocity time-histories: impulsive acceleration to a chosen velocity and a constant acceleration rate. A particular focus is on the conditions under which the stationary limit assumed by theories of dynamic strain aging is obeyed. According to our results, two conditions—one on the dislocation velocity and one on the acceleration rate—must be satisfied for the stationary limit to hold. Using the Orowan relation and a line tension model, we obtain estimates for the temperature, stress, strain rate, and dislocation density regimes where the stationary limit is valid, and compare these results with experiments for a few material systems.

Authors:

Epperly, E. N. ^[1];

^[2]

Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Sandia National Lab. (SNL-CA), Livermore, CA (United States); Rutgers Univ., Piscataway, NJ (United States)

Publication Date:: Mon May 04 00:00:00 EDT 2020

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

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

OSTI Identifier:: 1619233

Alternate Identifier(s):: OSTI ID: 1694111

Report Number(s):: SAND-2020-3746J
Journal ID: ISSN 1359-6454; 685129

Grant/Contract Number:: AC04-94AL85000; NA0003525

Resource Type:: Accepted Manuscript

Journal Name:: Acta Materialia

Additional Journal Information:: Journal Volume: 193; Journal Issue: C; Journal ID: ISSN 1359-6454

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; Cottrell atmospheres; Dislocation dynamics; Solute strengthening

Citation Formats


                    Epperly, E. N., and Sills, R. B. Transient solute drag and strain aging of dislocations.  United States: N. p., 2020. 
Web.  doi:10.1016/j.actamat.2020.03.031.

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                    Epperly, E. N., & Sills, R. B. Transient solute drag and strain aging of dislocations.  United States.  https://doi.org/10.1016/j.actamat.2020.03.031

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                    Epperly, E. N., and Sills, R. B. Mon .  
"Transient solute drag and strain aging of dislocations".  United States.  https://doi.org/10.1016/j.actamat.2020.03.031.  https://www.osti.gov/servlets/purl/1619233.

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@article{osti_1619233,

  title        = {Transient solute drag and strain aging of dislocations},

  author       = {Epperly, E. N. and Sills, R. B.},

  abstractNote = {The transient drag force exerted by mobile solutes on a moving dislocation is computed using continuum theory. These mobile solutes form so-called Cottrell atmospheres around dislocations during static and dynamic strain aging. We evaluate the evolution of the drag force exerted by the atmosphere under two velocity time-histories: impulsive acceleration to a chosen velocity and a constant acceleration rate. A particular focus is on the conditions under which the stationary limit assumed by theories of dynamic strain aging is obeyed. According to our results, two conditions—one on the dislocation velocity and one on the acceleration rate—must be satisfied for the stationary limit to hold. Using the Orowan relation and a line tension model, we obtain estimates for the temperature, stress, strain rate, and dislocation density regimes where the stationary limit is valid, and compare these results with experiments for a few material systems.},

  doi          = {10.1016/j.actamat.2020.03.031},

  journal      = {Acta Materialia},

  number       = C,

  volume       = 193,

  place        = {United States},

  year         = {Mon May 04 00:00:00 EDT 2020},

  month        = {Mon May 04 00:00:00 EDT 2020}

}

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Similar Records

Title: Transient solute drag and strain aging of dislocations

Abstract

Citation Formats

The binding force between an edge dislocation and a fermi-dirac solute atmosphere journal, March 1982

The binding force between a peierls-nabarro edge dislocation and a fermi-dirac solute atmosphere journal, November 1982

A dislocation model for the strain-ageing behaviour of steel journal, January 1972

A non-singular continuum theory of dislocations journal, March 2006

Solute and dislocation junction interactions journal, August 2008

Dislocation Theory of Yielding and Strain Ageing of Iron journal, January 1949

A predictive mechanism for dynamic strain ageing in aluminium–magnesium alloys journal, October 2006

Solute segregation kinetics and dislocation depinning in a binary alloy journal, June 2015

Diffusion coefficients of some solutes in fcc and liquid Al: critical evaluation and correlation journal, December 2003

Comparison of continuum and cross-core theories of dynamic strain aging journal, August 2020

Solute drag on moving edge dislocations journal, July 1984

Quantum-to-continuum prediction of ductility loss in aluminium–magnesium alloys due to dynamic strain aging journal, August 2014

Quantitative size-factors for metallic solid solutions journal, February 1966

Evolution of dislocation densities and the critical conditions for the Portevin-Le Châtelier effect journal, May 1990

The Effect of Temperature on Cottrell Atmospheres journal, April 1956

Serrated flow in Ni-C alloys journal, April 1970

Atomistic simulations of dislocation mobility in Al, Ni and Al/Mg alloys journal, March 2005

Strain rate sensitivity of the commercial aluminum alloy AA5182-O journal, January 2005

Atomistic study of pipe diffusion in Al–Mg alloys journal, January 2004

Solute effects on dislocation glide in metals journal, March 2003

Permeability, solubility and diffusivity of hydrogen isotopes in stainless steels at high gas pressures journal, January 2007

Solute drag on perfect and extended dislocations journal, February 2016

Line-length-dependent dislocation mobilities in an FCC stainless steel alloy journal, December 2020

Effects of hydrogen and carbon on thermally activated deformation in nickel journal, June 1992

Solute strengthening of both mobile and forest dislocations: The origin of dynamic strain aging in fcc metals journal, September 2008

Phase relations in the hydrogen-austenite system journal, July 1993

Dislocation motion in the presence of diffusing solutes: a computer simulation study journal, May 2000

Atomistically informed solute drag in Al–Mg journal, June 2008

The binding force between an edge dislocation and a fermi-dirac solute atmosphere
journal, March 1982

The binding force between a peierls-nabarro edge dislocation and a fermi-dirac solute atmosphere
journal, November 1982

A dislocation model for the strain-ageing behaviour of steel
journal, January 1972

A non-singular continuum theory of dislocations
journal, March 2006

Solute and dislocation junction interactions
journal, August 2008

Dislocation Theory of Yielding and Strain Ageing of Iron
journal, January 1949

A predictive mechanism for dynamic strain ageing in aluminium–magnesium alloys
journal, October 2006

Solute segregation kinetics and dislocation depinning in a binary alloy
journal, June 2015

Diffusion coefficients of some solutes in fcc and liquid Al: critical evaluation and correlation
journal, December 2003

Comparison of continuum and cross-core theories of dynamic strain aging
journal, August 2020

Solute drag on moving edge dislocations
journal, July 1984

Quantum-to-continuum prediction of ductility loss in aluminium–magnesium alloys due to dynamic strain aging
journal, August 2014

Quantitative size-factors for metallic solid solutions
journal, February 1966

Evolution of dislocation densities and the critical conditions for the Portevin-Le Châtelier effect
journal, May 1990

The Effect of Temperature on Cottrell Atmospheres
journal, April 1956

Serrated flow in Ni-C alloys
journal, April 1970

Atomistic simulations of dislocation mobility in Al, Ni and Al/Mg alloys
journal, March 2005

Strain rate sensitivity of the commercial aluminum alloy AA5182-O
journal, January 2005

Atomistic study of pipe diffusion in Al–Mg alloys
journal, January 2004

Solute effects on dislocation glide in metals
journal, March 2003

Permeability, solubility and diffusivity of hydrogen isotopes in stainless steels at high gas pressures
journal, January 2007

Solute drag on perfect and extended dislocations
journal, February 2016

Line-length-dependent dislocation mobilities in an FCC stainless steel alloy
journal, December 2020

Effects of hydrogen and carbon on thermally activated deformation in nickel
journal, June 1992

Solute strengthening of both mobile and forest dislocations: The origin of dynamic strain aging in fcc metals
journal, September 2008

Phase relations in the hydrogen-austenite system
journal, July 1993

Dislocation motion in the presence of diffusing solutes: a computer simulation study
journal, May 2000

Atomistically informed solute drag in Al–Mg
journal, June 2008