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Study of slip activity in a Mg-Y alloy by in situ high energy X-ray diffraction microscopy and elastic viscoplastic self-consistent modeling

Journal Article · · Acta Materialia
 [1];  [2];  [2];  [2];  [3];  [4];  [5];  [3];  [6]
  1. Helmholtz-Zentrum Geesthact (Germany); Shanghai Jiao Tong Univ. (China)
  2. Shanghai Jiao Tong Univ. (China)
  3. Helmholtz-Zentrum Geesthacht (Germany)
  4. Argonne National Lab. (ANL), Lemont, IL (United States)
  5. Argonne National Lab. (ANL), Argonne, IL (United States)
  6. Shanghai Jiao Tong Univ. (China); Shanghai Innovation Inst. for Materials, Shanghai (China)
+ Show Author Affiliations
Slip activity from various slip modes largely determines the yield strength and ductility of Mg alloys. Solid solution elements in Mg can change the slip activity dramatically. In this paper, far-field high energy X-ray diffraction microscopy (FF-HEDM) is employed to study slip activity in a Mg-3wt%Y alloy during an in situ tensile experiment. The specimen was incrementally loaded up to 3% engineering strain along the rolling direction. At each load step, FF-HEDM data were collected to track the crystallographic orientation, center of mass, and stress tensor changes of nearly 1000 grains in the probed volume. By analyzing the change in orientation and stress tensor of individual grains at different load steps, it is possible to identify the activated slip systems and measure their critical resolved shear stress (CRSS) values. Prismatic slip and pyramidal I slip are found to be very active in this alloy. The estimated CRSS values for basal slip, prismatic slip and pyramidal I slip are 12 MPa, 38 MPa, and 36 MPa, respectively. These CRSS values were applied in a dislocation-based elastic viscoplastic self-consistent (EVPSC) model that successfully simulated the tensile stress-strain curve from the FF-HEDM experiment. The model also qualitatively predicted the crystal rotation in most of the selected grains, though it underestimated the internal stress and the magnitude of crystal rotation in these grains. Influence of solute Y on the strength and ductility of Mg alloys is discussed.
Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
Alexander von Humboldt Foundation; National Science Foundation of China; USDOE Office of Science; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1465754
Alternate ID(s):
OSTI ID: 22744716
OSTI ID: 1582808
Journal Information:
Acta Materialia, Journal Name: Acta Materialia Journal Issue: C Vol. 155; ISSN 1359-6454
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (58)

A review on the effect of rare-earth elements on texture evolution during processing of magnesium alloys journal September 2016
In Situ Characterization of Twin Nucleation in Pure Ti Using 3D-XRD journal November 2013
Crystal Plasticity Model Validation Using Combined High-Energy Diffraction Microscopy Data for a Ti-7Al Specimen journal November 2016
High-energy diffraction microscopy at the advanced photon source journal July 2011
A self-consistent anisotropic approach for the simulation of plastic deformation and texture development of polycrystals: Application to zirconium alloys journal September 1993
Application of texture simulation to understanding mechanical behavior of Mg and solid solution alloys containing Li or Y journal December 2001
Strain tensor development in a single grain in the bulk of a polycrystal under loading journal April 2002
The texture and anisotropy of magnesium–zinc–rare earth alloy sheets journal April 2007
On the role of non-basal deformation mechanisms for the ductility of Mg and Mg–Y alloys journal January 2011
In situ analysis of the tensile and tensile-creep deformation mechanisms in rolled AZ31 journal February 2012
The relation between ductility and stacking fault energies in Mg and Mg–Y alloys journal April 2012
Effects of the initial dislocation density on size effects in single-crystal magnesium journal June 2013
Micropillar and macropillar compression responses of magnesium single crystals oriented for single slip or extension twinning journal February 2014
Generalized stacking fault energy, ideal strength and twinnability of dilute Mg-based alloys: A first-principles study of shear deformation journal April 2014
Ductility improvement of Mg alloys by solid solution: Ab initio modeling, synthesis and mechanical properties journal May 2014
Slip systems and dislocation densities in individual grains of polycrystalline aggregates of plastically deformed CoTi and CoZr alloys journal June 2014
Evaluating the effect of yttrium as a solute strengthener in magnesium using in situ neutron diffraction journal October 2014
Effect of grain size on slip activity in pure magnesium polycrystals journal February 2015
Deformation-induced orientation spread in individual bulk grains of an interstitial-free steel journal February 2015
Study of 3-D stress development in parent and twin pairs of a hexagonal close-packed polycrystal: Part I – in-situ three-dimensional synchrotron X-ray diffraction measurement journal July 2015
A study of stress relaxation in AZ31 using high-energy X-ray diffraction journal December 2015
Deformation behavior of Mg-8.5wt.%Al alloy under reverse loading investigated by in-situ neutron diffraction and elastic viscoplastic self-consistent modeling journal April 2016
Yield symmetry and reduced strength differential in Mg-2.5Y alloy journal November 2016
Modeling slip system strength evolution in Ti-7Al informed by in-situ grain stress measurements journal April 2017
Direct measurement of critical resolved shear stress of prismatic and basal slip in polycrystalline Ti using high energy X-ray diffraction microscopy journal June 2017
Experimentally quantifying critical stresses associated with basal slip and twinning in magnesium using micropillars journal August 2017
First-principles calculations of stacking fault energies in Mg-Y, Mg-Al and Mg-Zn alloys and implications for 〈 c + a 〉 activity journal September 2017
Investigation of fatigue crack initiation from a non-metallic inclusion via high energy x-ray diffraction microscopy journal September 2017
New opportunities for quantitative tracking of polycrystal responses in three dimensions journal August 2015
A dislocation-based constitutive law for pure Zr including temperature effects journal May 2008
Solute strengthening of prismatic slip, basal slip and twinning in Mg and Mg–Zn binary alloys journal August 2013
A crystal plasticity model for hexagonal close packed (HCP) crystals including twinning and de-twinning mechanisms journal October 2013
Stress and strain relaxation in magnesium AZ31 rolled plate: In-situ neutron measurement and elastic viscoplastic polycrystal modeling journal April 2016
In-situ analysis of the tensile deformation modes and anisotropy of extruded Mg-10Gd-3Y-0.5Zr (wt.%) at elevated temperatures journal September 2016
Flow stress and work hardening of Mg-Y alloys journal May 2017
Study of lattice strains in magnesium alloy AZ31 based on a large strain elastic-viscoplastic self-consistent polycrystal model journal August 2012
Study of grain-level deformation and residual stresses in Ti-7Al under combined bending and tension using high energy diffraction microscopy (HEDM) journal September 2016
A finite strain elastic–viscoplastic self-consistent model for polycrystalline materials journal April 2010
Study of residual stresses in Ti-7Al using theory and experiments journal December 2017
Simultaneous measurement of the strain tensor of 10 individual grains embedded in an Al tensile sample journal December 2004
Effect of rare earth additions on microstructure and texture development of magnesium alloy sheets journal October 2010
In situ TEM compression testing of Mg and Mg–0.2wt.% Ce single crystals journal February 2011
Mechanical twinning and detwinning in pure Ti during loading and unloading – An in situ high-energy X-ray diffraction microscopy study journal December 2014
Role of yttrium in activation of 〈 c + a 〉 slip in magnesium: An atomistic approach journal November 2015
Instantiation of crystal plasticity simulations for micromechanical modelling with direct input from microstructural data collected at light sources journal April 2017
Observation of non-basal slip in Mg-Y by in situ three-dimensional X-ray diffraction journal January 2018
Strong grain neighbour effects in polycrystals journal January 2018
Effect of solute atoms on dislocation motion in Mg: An electronic structure perspective journal March 2015
Evolution of stress in individual grains and twins in a magnesium alloy aggregate journal July 2009
Tracking: a method for structural characterization of grains in powders or polycrystals journal November 2001
Three-dimensional maps of grain boundaries and the stress state of individual grains in polycrystals and powders journal November 2001
Determining grain resolved stresses in polycrystalline materials using three-dimensional X-ray diffraction journal April 2010
A fast methodology to determine the characteristics of thousands of grains using three-dimensional X-ray diffraction. I. Overlapping diffraction peaks and parameters of the experimental setup journal July 2012
A fast methodology to determine the characteristics of thousands of grains using three-dimensional X-ray diffraction. II. Volume, centre-of-mass position, crystallographic orientation and strain state of grains journal July 2012
An introduction to three-dimensional X-ray diffraction microscopy journal October 2012
Dislocation densities and prevailing slip-system types determined by X-ray line profile analysis in a textured AZ31 magnesium alloy deformed at different temperatures journal January 2013
GrainSpotter : a fast and robust polycrystalline indexing algorithm journal January 2014
Far-field high-energy diffraction microscopy: a tool for intergranular orientation and strain analysis journal July 2011

Cited By (3)

Three-dimensional character of the deformation twin in magnesium journal July 2019
On the High Formability of AZ31-0.5Ca Magnesium Alloy journal November 2018
Study of basal < a > and pyramidal < c + a > slips in Mg-Y alloys using micro-pillar compression journal February 2020

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