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Quantification of Cyclic Twinning-Detwinning Behavior During Low-Cycle Fatigue of Pure Magnesium Using High Energy X-Ray Defraction
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The dataset contains the data supplement for: A.D. Murphy-Leonard, D.C. Pagan, A. Beaudoin, M.P. Miller, J.E. Allison, Quantification of cyclic twinning-detwinning behavior during low-cycle fatigue of pure magnesium using high energy X-ray diffraction. International Journal of Fatigue, 125 (2019), 314-323. https://doi.org/10.1016/j.ijfatigue.2019.04.011
The cyclic twinning and detwinning behavior of extruded Mg was investigated using in-situ high energy X-ray diffraction (HEXD) under fully-reversed low cycle fatigue conditions. Measurements were conducted at three levels of applied strain. The initial texture was such that the c-axis in most grains was perpendicular to the loading direction, an orientation in which extension twinning is favored during compressive loading. At strain amplitudes greater than 0.5%, tension-compression asymmetry was observed during cyclic loading and related to cyclic twinning and detwinning. The twinning and detwinning behavior were characterized by monitoring the evolution of X-ray diffraction peaks associated with the basal {0 0 0 2} planes throughout selected cycle. At cyclic strains greater than 0.5%, in-situ HEXD results show that twinning occurs during the compression portion of the cycle and, at early stages of fatigue, most twins are detwinned under reversed loading during the tensile portion of the cycle. It was also observed that as the number of fatigue cycles increases the twin volume fraction increases. After 100–200 fatigue cycles, the detwinning process was observed to be incomplete and a significant fraction of residual twins remained throughout an entire cycle. Using electron back scatter diffraction imaging on the surface of interrupted fatigue tests, twinning and detwinning behavior was investigated and the presence of persistent twins, including residual twins, was observed. At a lower applied strain (0.4%), twinning and tension-compression yield asymmetries associated with twinning were not observed. |
Aeriel Murphy-Leonard, John Allison, Darren Pagan, Armand Beaudoin, Matthew Miller |
Magnesium
Low-cycle fatigue
Twinning
Cyclic Stress-Strain
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2 years ago |
1 day ago |
2025-07-09 18:35:03 |
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Characterizing Microscale Deformation Mechanisms and Macroscopic Tensile Properties of a High Strength Magnesium Rare-Earth Alloy WE43-T5 : A Combined Experimental and Crystal Plasticity Approach
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This dataset includes initial EBSD maps of the Magnesium Rare-Earth alloy, SEM-DIC datasets with displacement and strain maps for a given Field of View (FOV), and Crystal Plasticity Finite Element simulations of the strain field, slip and twin activity for the same FOVs by setting up a Boundary Value Problem (BVP) with same boundary displacement conditions as the experimental data. The simulations have been performed using the PRISMS-CPFE code. The experimental input displacement and strain maps are in .mat format, readable by programs such as Matlab. The output files are in the *.vtu format, readable by programs such as VisIt and ParaView. Details regarding the simulation and characterization methods can be found in the linked paper. U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences, Award Number DE-SC0008637 |
Alan Githen, Sriram Ganesan, Zhe Chen, John Allison, Veera Sundararaghavan, Samantha Daly |
Magnesium
Deformation modes
Digital Image Correlation
DIC
Crystal Plasticity
PRISMS-CPFE
WE43
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5 years ago |
4 years ago |
2021-04-12 13:31:55 |
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The effects of heat treatment on very high cycle fatigue behavior in hot-rolled WE43 magnesium
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This is a database of fatigue life and crack growth data for hot-rolled WE43 magnesium, corresponding to International Journal of Fatigue publication http://dx.doi.org/10.1016/j.ijfatigue.2016.05.033. It is provided as a demonstration of the new “Beta" version of the Materials Commons Dataset and Publication Features. Please note, the meta-data provided may be updated over time. We reserve the right to update this data without notification. If you would like to be notified of changes please email Jacob Adams at jfadams@umich.edu. U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering, Award #DE-SC0008637 as part of the Center for PRedictive Integrated Structural Materials Science (PRISMS Center) at University of Michigan University of Michigan |
Jacob F. Adams, John E. Allison, J. Wayne Jones |
Magnesium
Ultrasonic Fatigue
Fatigue Crack Growth
Fatigue Crack Initiation
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8 years ago |
4 years ago |
2021-04-12 13:31:55 |
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A quantitative study of stress fields ahead of a slip band blocked by a grain boundary in unalloyed magnesium
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Mohsen Taheri Andani, Aaditya Lakshmanan, Veera Sundararaghavan, John Allison, Amit Misra |
Magnesium
HR-EBSD
Grain Boundaries
Hall-Petch
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5 years ago |
4 years ago |
2021-04-12 13:31:55 |
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The effects of heat treatment on the response of WE43 Mg alloy: crystal plasticity finite element simulation and SEM-DIC experiment
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This dataset includes initial EBSD maps of the Magnesium Rare-Earth alloy, SEM-DIC datasets with displacement and strain maps for a given Field of View (FOV), and Crystal Plasticity Finite Element simulations of the strain field, slip and twin activity for the same FOVs by setting up a Boundary Value Problem (BVP) with same boundary displacement conditions as the experimental data. The simulations have been performed using the PRISMS-CPFE code. The experimental input displacement and strain maps are in .mat format, readable by programs such as Matlab. The output files are in the *.vtu format, readable by programs such as VisIt and ParaView. This work was supported by the U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering under Award#DE-SC0008637 as part of the Center for Predictive Integrated Structural Materials Science (PRISMS Center) at University of Michigan. |
Sriram Ganesan, Mohammadreza Yaghoobi, Alan Githens, Zhe Chen, Samantha Daly, John Allison, Veera Sundararaghavan |
Magnesium
Deformation modes
Digital Image Correlation
Crystal Plasticity
PRISMS-CPFE
WE43
SEM-DIC
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5 years ago |
4 years ago |
2021-04-12 13:31:55 |
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Extension twinning in rolled Mg alloy WE43
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The present work investigates the extension twinning in rolled Mg alloy WE43 using a combination of scanning electron microscopy with digital image correlation (SEM-DIC) and crystal plasticity finite element (CPFE) simulation. Rolled Mg alloy WE43 was subjected to in-situ uniaxial compression along its rolling direction. Full-field displacement maps were gathered using SEM-DIC during load pauses, and twin variant maps were obtained from these displacements using post-processing analysis. CPFE was used to investigate the experimental results via a multi-scale twinning model developed for HCP polycrystals. In addition to stress-strain curves, crystal plasticity parameters were calibrated using the variation of twin area versus the applied strain to accurately capture the twinning parameters. A new SEM-DIC pipeline was also developed for the open-source PRISMS-Plasticity CPFE software that can read in the precise deformation map generated by SEM-DIC experiment as an input boundary condition for the finite element simulation and conduct the CPFE simulation. It is shown that CPFE can successfully capture the macroscopic response and model both strain and twin area fraction maps. However, the model cannot capture sharp strain localization and twinning bands, instead it smears certain areas of localizations. |
Mohammadreza Yaghoobi, Zhe Chen, Veera Sundararaghavan, John E. Allison, Samantha Daly |
Magnesium
Twinning
Crystal plasticity finite element
PRISMS-Plasticity
Digital image correlation
Deformation mechanisms
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4 years ago |
4 years ago |
2021-04-12 13:31:55 |
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Effects of Zn and Ca on deformation texture evolution of Mg-Zn-Ca alloys at elevated temperatures
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This work utilized crystal plasticity simulations and experimental thermo-mechanical processing to examine how Zn and Ca content affects texture evolution in Mg-Zn-Ca alloys during simulated hot rolling. Four different compositions were studied: unalloyed Mg and three Mg alloys of ZX0p50 (Mg- 0.5 wt% Zn- 0.1 wt% Ca), ZX30 (Mg-3 wt% Zn- 0.1 wt% Ca), and ZX31 (Mg-3 wt% Zn- 0.3 wt% Ca). Multi-pass Gleeble experiments simulated hot rolling using plane strain conditions.
The paper associated with this dataset also utlizes the following samples from the dataset titled: "Coupling thermomechanical processing and alloy design to improve textures in Mg-Zn-Ca sheet alloys" <br>
DOI: 10.13011/m3-hvkb-rm86 <br>
pure_d34 <br>
ZX20_d21 <br>
ZX31_d32 <br> |
Mohammadreza yaghoobi, Tracy Berman, John Allison |
Magnesium
PRISMS-Plasticity
Texture
solute effects
crystal plasticity finite element
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5 months ago |
1 day ago |
2025-07-09 14:38:36 |
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The dynamics of recrystallized grains during static recrystallization in a hot-compressed Mg-3.2Zn-0.1Ca wt.% alloy using in-situ far field high-energy diffraction microscopy
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The poor formability of rolled magnesium (Mg) alloy sheet remains a barrier to its widespread commercial use and is attributed to the strong basal texture that occurs in most mechanically processed Mg alloys. Recent attempts to successfully weaken the texture have been made using Mg-Zn-Ca alloys in combination with post-deformation annealing. The motivation for this work is to understand the evolution of the mesoscale processes that occur during annealing (specifically, static recrystallization) and lead to this texture weakening. Toward this goal, more than 1,200 recrystallized grains were studied during in-situ annealing in an 80% hot-compressed Mg-3.2Zn-0.1Ca wt.% (ZX30) alloy using far-field high-energy diffraction (ff-HEDM). The relative volume, crystallographic orientation, and position of each recrystallized grain emerging within a 1×1×0.1 mm3 volume were tracked throughout static recrystallization. These measurements were used to quantitatively measure the nucleation and growth statistics associated with recrystallized grains as a function of annealing time. The measurements reflected a highly heterogeneous process with individual grain dynamics varying wildly from the average, and they also point to relations between relative grain volume and growth rate (or more accurately, the rate of change of relative grain volume) with a peak average rate occurring early in recrystallization (at 22% recrystallized). We also explore whether a recrystallized grain's current state can be used to predict its future growth behaviors with implications for Monte Carlo simulations. Finally, we investigate whether recrystallized grains with specific orientations have preferential nucleation and/or growth, and we find that grains with a weak basal texture have a pronounced nucleation advantage that increases with annealing time, while other grain orientations have a slight growth advantage that diminishes with annealing time. |
Reza Roumina, Sangwon Lee, Tracy Berman, John Allison, Ashley Bucsek |
Magnesium
Recrystallization
HEDM
insitu
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3 years ago |
5 months ago |
2025-01-23 20:53:21 |
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Characterization of recrystallized grains during static recrystallization of hot-compressed Mg-Zn-Ca alloys using in-situ far-field high-energy diffraction microscopy
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Although rolled magnesium (Mg) alloys generally suffer from strong crystallographic textures and poor formability, adding Ca and Zn to magnesium sheet can result in a desirably weak recrystallization texture and improved formability. In this study, we explore the effect of Zn content on the static recrystallization of three 80% hot-compressed alloys, Mg-0.5Zn-0.1Ca wt.% (ZX050), Mg-1Zn-0.1Ca wt.% (ZX10) and Mg-3.2Zn-0.1Ca wt.% (ZX30), using far-field high-energy diffraction microscopy (ff-HEDM). Individual recrystallized grains are tracked and their 3D centroid, relative volume, and grain-averaged crystallographic orientation are measured during in-situ annealing. These measurements are used to compare the kinetics and texture evolution of recrystallized grains in ZX alloys as a function of Zn content. Fully recrystallized microstructures are observed for the ZX30 and the ZX10 alloys after annealing at 230ºC and 330ªC, respectively. In contrast, only a partially recrystallized microstructure for the ZX050 alloy is observed after >1 hour of annealing at 430ºC. The recrystallized grains also show slower growth rates for ZX050 as compared to ZX10 and ZX30. We also use the results to discuss the recrystallization grain textures, as well as the correlation between orientations and the nucleation and growth rates of recrystallized grains, both as a function of annealing time and Zn content. |
REZA ROUMINA, Sangwon Lee, Tracy Berman, Kate Shanks, John Allison, Ashley Bucsek |
Magnesium
Recrystallization
texture
HEDM
insitu
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1 month ago |
1 day ago |
2025-07-09 14:38:30 |