skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Simulating the mechanisms of serrated flow in interstitial alloys with atomic resolution over diffusive timescales

Journal Article · · Nature Communications

Abstract The Portevin-Le Chatelier (PLC) effect is a phenomenon by which plastic slip in metallic materials becomes unstable, resulting in jerky flow and the onset of inhomogeneous deformation. The PLC effect is thought to be fundamentally caused by the dynamic interplay between dislocations and solute atoms. However, this interplay is almost always inaccessible experimentally due to the extremely fine length and time scales over which it occurs. In this paper, simulations of jerky flow in W-O interstitial solid solutions reveal three dynamic regimes emerging from the simulated strain rate-temperature space: one resembling standard solid solution strengthening, another one mimicking solute cloud formation, and a third one where dislocation/solute coevolution leads to jerky flow as a precursor of dynamic strain aging. The simulations are carried out in a stochastic framework that naturally captures rare events in a rigorous manner, providing atomistic resolution over diffusive time scales using no adjustable parameters.

Research Organization:
Univ. of California, Los Angeles, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0012774
OSTI ID:
1619582
Alternate ID(s):
OSTI ID: 1802472
Journal Information:
Nature Communications, Journal Name: Nature Communications Vol. 11 Journal Issue: 1; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United Kingdom
Language:
English
Citation Metrics:
Cited by: 30 works
Citation information provided by
Web of Science

References (60)

Dynamic strain aging caused by a new Peierls mechanism at high-temperature in iron journal January 2015
Influence of Dislocation Separation on Dynamic Strain Aging in a Fe–Mn–C Austenitic Steel journal January 2012
Current theoretical approaches to collective behavior of dislocations journal March 2007
On the Portevin-Le Chatelier Effect Due to Snoek Strain Aging in the Niobium Oxygen System journal February 1983
Dynamic strain ageing in iron alloys: The shielding effect of carbon journal June 2016
Attractive interaction between interstitial solutes and screw dislocations in bcc iron from first principles journal June 2018
The twin mechanism of Portevin Le Chatelier in Mg–5Li–3Al–1.5Zn–2RE alloy journal July 2011
Solution softening mechanism of iridium and rhenium in tungsten at room temperature journal January 1991
Slip statistics of dislocation avalanches under different loading modes journal April 2015
The Portevin-Le Chatelier effect in hydrogen charged nickel journal April 1964
From ultrasoft pseudopotentials to the projector augmented-wave method journal January 1999
Dislocation glide in model Ni ( Al ) solid solutions by molecular dynamics journal August 2004
The portevin-Le Chatelier effect in deformation with constant stress rate journal March 1985
Serrated flow in nanostructured binary Mg-Al alloys journal January 2017
Dynamic Strain Aging and the Wire Drawing of Low Carbon Steel Rods. journal January 1995
Strengthening to softening transition in lath martensite journal March 2019
Monte Carlo and molecular dynamics simulations of screw dislocation locking by Cottrell atmospheres in low carbon Fe–C alloys journal November 2015
Ab initio molecular dynamics simulation of hydrogen diffusion in α -iron journal April 2010
The flow stress of iron and its dependence on impurities journal July 1959
Ab initiomolecular dynamics for liquid metals journal January 1993
Moving dislocations in disordered alloys: Connecting continuum and discrete models with atomistic simulations journal July 2006
An in situ study of hardening and softening of iron by carbon interstitials journal July 2011
Kinetic Monte Carlo method for dislocation migration in the presence of solute journal January 2005
Diffusion of interstitial hydrogen into and through bcc Fe from first principles journal August 2004
Unraveling the temperature dependence of the yield strength in single-crystal tungsten using atomistically-informed crystal plasticity calculations journal March 2016
Plastic anisotropy and dislocation trajectory in BCC metals journal May 2016
Universality beyond power laws and the average avalanche shape journal January 2011
Dynamic transitions from smooth to rough to twinning in dislocation motion journal February 2004
The solubility of oxygen in transition metal alloys journal February 1962
Avalanche statistics and the intermittent-to-smooth transition in microplasticity journal August 2019
Observation of lüders bands in single crystals journal November 1993
Ab initio investigation of the Peierls potential of screw dislocations in bcc Fe and W journal June 2013
Helium segregation to screw and edge dislocations in α-iron and their yield strength journal February 2015
Portevin—Le Chatelier effect in Al-Si binary alloys journal September 1986
Thermally-activated non-Schmid glide of screw dislocations in W using atomistically-informed kinetic Monte Carlo simulations journal February 2015
Strain aging embrittlement of the ordered intermetallic compound NiAl journal October 1993
Dislocation Core Energies and Core Fields from First Principles journal February 2009
Stochastic simulation of dislocation glide in tantalum and Ta-based alloys journal June 2005
Dislocation motion in the presence of diffusing solutes: a computer simulation study journal May 2000
Intermittent dynamics in complex systems driven to depletion journal March 2018
A mechanism for the negative strain-rate sensitivity of dilute solid solutions journal July 2004
Molecular dynamics study of solute strengthening in Al/Mg alloys journal August 2006
Dynamic strain aging in a tungsten heavy metal journal November 1996
Dislocation structures in single-crystal tungsten and tungsten alloys journal May 1970
Ab initio modeling of the two-dimensional energy landscape of screw dislocations in bcc transition metals journal January 2014
Comparison of atomistic and elasticity approaches for carbon diffusion near line defects in α-iron journal October 2011
The Portevin-Le chatelier effect in vanadium journal June 1971
Electronic Structure Calculations of Oxygen Atom Transport Energetics in the Presence of Screw Dislocations in Tungsten journal February 2019
Solid solution softening and hardening journal November 1973
Propagative instabilities: An experimental view journal November 1993
Thermomechanical response of HSLA-65 steel plates: experiments and modeling journal February 2005
Serrated flow behavior in tungsten heavy alloy journal October 2015
Solute effects on dislocation glide in metals journal March 2003
Quantitative prediction of solute strengthening in aluminium alloys journal August 2010
Intermittent MHD structures and classical discontinuities journal January 2008
Temperature and high strain rate dependence of tensile deformation behavior in single-crystal iron from dislocation dynamics simulations journal May 2014
Controlling Strain Bursts and Avalanches at the Nano- to Micrometer Scale journal October 2016
Low-temperature softening in body-centered cubic alloys journal January 1980
Investigating the Portevin–Le Châtelier effect in strain rate and stress rate controlled tests by the acoustic emission and laser extensometry techniques journal July 2007
Lüders bands in deformed silicon crystals journal July 1979

Similar Records

Serrated flow in Fe-28Mn-9Al-xC alloys in a temperature range of 573--873 K
Journal Article · Sat Feb 01 00:00:00 EST 1997 · Scripta Materialia · OSTI ID:1619582

Portevin-Le Chatelier instabilities and stoichiometric effects in B2 titanium aluminides
Journal Article · Fri Mar 15 00:00:00 EST 1996 · Scripta Materialia · OSTI ID:1619582

Interstitial and substitutional solute effects in intermetallics
Conference · Thu Jan 01 00:00:00 EST 1998 · OSTI ID:1619582