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Virtual texture analysis to understand microstructure effects on deformation twinning and detwinning behavior in BCC metals

Journal Article · · Computational Materials Science

Understanding and predicting deformation twinning contributions to plastic deformation in BCC metals has been a long-standing challenge due to the interplay with dislocation slip and non-Schmid effects that render an asymmetry under tension and compression. This paper uses molecular dynamics simulations to understand the effect of unloading and grain orientation on deformation twinning in a nanocrystalline Fe (nc-Fe) system as a model BCC metal. The nc-Fe system is loaded under uniaxial stress tension and compression to understand the effect of grain orientation (Schmid effects) on deformation twinning behavior and the tension/compression asymmetry (non-Schmid effects). A new virtual texture analysis “VirTex” tool is used to understand the role of grain orientation on the nucleation of twins and their contributions to the observed stress–strain response. For certain grain orientations, the twinnability is observed to be different in tension and compression. In addition, the flow stress accommodation from twins in certain grains is observed to be different in tension and compression and different from that for the grains. Subsequent unloading leads to detwinning in the deformed microstructures, where the extent of detwinning depends on the strain from which the system is unloaded and on the morphology of the twin. Lastly, the simulations are carried out to analyze the role of the Schmid factor on the twinnability and asymmetry in tension and compression.

Research Organization:
University of Connecticut, Storrs, CT (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); U.S. Department of Education Graduate Assistance in Areas of National Need (GAANN)
Grant/Contract Number:
SC0023136
OSTI ID:
3011665
Journal Information:
Computational Materials Science, Journal Name: Computational Materials Science Vol. 249; ISSN 0927-0256
Publisher:
Elsevier BVCopyright Statement
Country of Publication:
United States
Language:
English

References (46)

Fast Parallel Algorithms for Short-Range Molecular Dynamics journal March 1995
The effect of grain size on the high-strain, high-strain-rate behavior of copper journal November 1995
Virtual texture analysis to investigate the deformation mechanisms in metal microstructures at the atomic scale journal April 2022
Virtual diffraction simulations using the quasi-coarse-grained dynamics method to understand and interpret plasticity contributions during in situ shock experiments journal July 2022
Role of $${\varvec{\alpha}} \to {\varvec{\varepsilon}} \to {\varvec{\alpha}}$$ phase transformation on the spall behavior of iron at atomic scales journal June 2022
Computational Analysis Methods in Atomistic Modeling of Crystals journal December 2013
Fracture of tungsten single crystals at low temperatures journal November 1966
Deformation of high purity tantalum single crystals at 4.2 K journal January 1975
Effect of shock pressure, pulse duration, and grain size on shock-deformation twinning in molybdenum journal October 1978
Deformation twinning journal January 1995
On deformation twinning in b.c.c. metals journal July 1993
Shock-induced deformation twinning in tantalum journal January 1997
Plastic anisotropy in b.c.c. transition metals journal March 1998
On the mechanism of {332} twinning in metastable β titanium alloys journal June 2016
Towards the ultimate strength of iron: spalling through laser shock journal August 2021
Molecular dynamics simulation studies on the size dependent tensile deformation and fracture behaviour of body centred cubic iron nanowires journal June 2015
Orientation dependent deformation behaviour of BCC iron nanowires journal January 2016
Structural characterization of deformed crystals by analysis of common atomic neighborhood journal September 2007
Plastic deformation of magnetically isotropic Cr single crystals compressed at 77 K journal March 2021
Deformation twinning in vanadium single crystals tested in compression at 77 K journal November 2018
Deformation twinning in body-centered cubic metals and alloys journal October 2023
Twinning system selection in a metastable β-titanium alloy by Schmid factor analysis journal June 2011
Molecular dynamics study of melting and freezing of small Lennard-Jones clusters journal September 1987
Observations of common microstructural issues associated with dynamic deformation phenomena: Twins, microbands, grain size effects, shear bands, and dynamic recrystallization journal February 2004
In situ atomic-scale observation of twinning-dominated deformation in nanoscale body-centred cubic tungsten journal March 2015
Unstable twin in body-centered cubic tungsten nanocrystals journal May 2020
Fingerprinting shock-induced deformations via diffraction journal May 2021
Phase Transformation in Tantalum under Extreme Laser Deformation journal October 2015
Molecular dynamics simulation on deformation mechanisms in body-centered-cubic molybdenum nanowires journal November 2011
Effect of strain rate and dislocation density on the twinning behavior in tantalum journal April 2016
Influence of defects on the shock Hugoniot of tantalum journal June 2019
Understanding and predicting damage and failure at grain boundaries in BCC Ta journal October 2019
Atomistic investigation of mechanical response and deformation mechanism of BCC Ta under double shock loading journal May 2021
Understanding the phase transformation mechanisms that affect the dynamic response of Fe-based microstructures at the atomic scales journal December 2021
Twinning in bcc metals under shock loading: a challenge to empirical potentials journal September 2011
Bending-induced deformation twinning in body-centered cubic tungsten nanowires journal February 2019
Extracting dislocations and non-dislocation crystal defects from atomistic simulation data journal September 2010
Automated identification and indexing of dislocations in crystal interfaces journal October 2012
Robust structural identification via polyhedral template matching journal May 2016
The yield and fracture behaviour of high-purity iron single crystals at high rates of strain journal July 1967
Molecular dynamics simulations of shock-induced deformation twinning of a body-centered-cubic metal journal September 2013
Shock-induced plasticity in tantalum single crystals: Interatomic potentials and large-scale molecular-dynamics simulations journal October 2013
Shock waves in polycrystalline iron: Plasticity and phase transitions journal April 2014
A general method to determine twinning elements journal November 2010
Interplay of slip and twinning in niobium single crystals compressed at 77 K journal November 2018
Breakdown of the Schmid Law in BCC Molybdenum Related to the Effect of Shear Stress Perpendicular to the Slip Direction journal April 2005

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