Correlations Among Void Shape Distributions, Dynamic Damage Mode, and Loading Kinetics

Brown, A. D.; Pham, Q.; Fortin, Elizabeth; Peralta, Pedro; Escobedo, J. P.; Cerreta, Ellen K; Luo, Sheng‐Nian; Dennis-Koller, Darcie; Byler, Darrin D.; Koskelo, Aaron C.; Xiao, X.

doi:10.1007/s11837-016-2178-5

Cited by 9 publications

(8 citation statements)

References 27 publications

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“…Once again, the capacity of HEDM to measure microstructure in advance of loading a sample was essential for advancing understanding of a physical phenomenon. This research has been followed up by a number of modeling-based studies that seek to interpret the results (96,97), as well as combinations of tomography and electron microscopy (98,99). A similar application to thermally induced voids (100) has also been performed.…”

Section: Shock Loading and Void Formationmentioning

confidence: 99%

High-Energy X-Ray Diffraction Microscopy in Materials Science

Bernier

Suter

Rollett

et al. 2020

Annu. Rev. Mater. Res.

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High-energy diffraction microscopy (HEDM) is an implementation of three-dimensional X-ray diffraction microscopy. HEDM yields maps of internal crystal orientation fields, strain states, grain shapes and locations as well as intragranular orientation distributions, and grain boundary character. Because it is nondestructive in hard materials, notably metals and ceramics, HEDM has been used to study responses of these materials to external fields including high temperature and mechanical loading. Currently available sources and detectors lead to a spatial resolution of ∼1 μm and an orientation resolution of <0.1○. With the penetration characteristic of high energies ( E ≥ 50 keV), sample cross-section dimensions of ∼1 mm can be studied in materials containing elements across much of the Periodic Table. This review describes hardware and software associated with HEDM as well as examples of applications. These applications include studies of grain growth, recrystallization, texture development, orientation gradients, deformation twinning, annealing twinning, plastic deformation, and additive manufacturing. We also describe relationships to other X-ray-based methods as well as prospects for further development.

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Section: Shock Loading and Void Formationmentioning

confidence: 99%

High-Energy X-Ray Diffraction Microscopy in Materials Science

Bernier

Suter

Rollett

et al. 2020

Annu. Rev. Mater. Res.

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“…Note that such large voids are characteristic not only of the fragments from the Selitrennoye settlement but also of the more structurally uniform samples from the Bolgar area. The analysis of the shape of the separated pores was performed in the approximation of an elongation [47,[54][55][56], which represents an ellipsoid shape of pores. The elongation of the pores is the ratio of the semi-axes of the Legendre ellipsoid [57].…”

Section: Resultsmentioning

confidence: 99%

Structural Features of the Fragments from Cast Iron Cauldrons of the Medieval Golden Horde: Neutron Tomography Data

et al. 2023

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The spatial arrangement of the internal pores inside several fragments of ancient cast iron cauldrons related to the medieval Golden Horde period was studied using the neutron tomography method. The high neutron penetration into a cast iron material provides sufficient data for detailed analysis of the three-dimensional imaging data. The size, elongation, and orientation distributions of the observed internal pores were obtained. As discussed, the imaging and quantitative analytical data are considered structural markers for the location of cast iron foundries, as well as a feature of the medieval casting process.

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“…Their findings were compared against numerical simulations incorporating crystal plasticity and void growth models with good agreement [17,18]. Subsequently, they applied their approach to nickel and titanium polycrystals, finding that there may be potential thresholds in the statistics that can differentiate between when a void has just nucleated, grown, or coalesced [15]. We further investigate the utility of these postmortem statistics here.…”

Section: Introductionmentioning

confidence: 98%

“…Such loading techniques can achieve strain rates as high as 10 7 s −1 or more, but can make specimen recovery difficult due to the large kinetic energies from loading. Instead, laser-driven approaches have been sparingly employed in recent spall studies to improve experimental throughput and impart less kinetic energy upon the specimen than through conventional experimental techniques [5][6][7][8][9][10][11][12][13][14][15][16]. Peralta et al and Wayne et al [11,12] used the Trident laser facility at Los Alamos National Laboratory with the goal of causing "incipient" spallation in copper polycrystals.…”

Section: Introductionmentioning

confidence: 99%

“…Brown et al [13][14][15] used the same laser-driven flyer system at the Trident laser facility, but used micro-computed-tomography (μ-CT) techniques to non-destructively obtain statistics of incipient spall voids within the specimen. They first examined void statistics in spall of polycrystalline copper, correlating the shape of captured voids to potential microstructure features where failure nucleates such as high-angle grain boundaries [13,14].…”

Section: Introductionmentioning

confidence: 99%

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Estimating Void Nucleation Statistics in Laser-Driven Spall

Mallick

Parker

Wilkerson

et al. 2020

J. dynamic behavior mater.

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We examine the statistical distribution of critical nucleation pressures necessary to dynamically grow voids during the spall failure of an AZ31B magnesium alloy. The approach uses laser-driven micro-flyers to generate spall over times of the order of tens of nanoseconds, allowing us to focus on void nucleation processes rather than void coalescence processes. Our methodology combines quantitative postmortem characterization of void mediated failure with time-resolved interferometry of the failure event, and reveals the dynamics of the failure process. We infer the distribution of the underlying nucleation pressures and explore the associated strain rate dependence of spall strength in these alloys.

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Correlations Among Void Shape Distributions, Dynamic Damage Mode, and Loading Kinetics

Cited by 9 publications

References 27 publications

High-Energy X-Ray Diffraction Microscopy in Materials Science

High-Energy X-Ray Diffraction Microscopy in Materials Science

Structural Features of the Fragments from Cast Iron Cauldrons of the Medieval Golden Horde: Neutron Tomography Data

Estimating Void Nucleation Statistics in Laser-Driven Spall

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