New Developments in Deformation Experiments at High Pressure

Durham, W. B.; Weidner, Donald J.; Karato, Shun‐ichiro; Wang, Yanbin

doi:10.2138/gsrmg.51.1.21

Cited by 47 publications

(37 citation statements)

References 105 publications

(113 reference statements)

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“…The changes to the Kawai geometry, discussed here, are analogous to the modifications made to the DIA by Durham et al 7 and Wang et al 44 in building the D-DIA. As with the T-Cup and the D-DIA, the DT-Cup is designed to be used in conjunction with synchrotron X-rays thus enabling direct monitoring of the strain and stress in the sample during an experiment.…”

Section: The Designmentioning

confidence: 65%

“…A significant step in overcoming these limitations came with the development of the Deformation-DIA. 7,44 The key innovation in the D-DIA is the addition of secondary actuators within the DIA tooling which enables two of the anvils compressing the cubic sample assemblage to be advanced independently of the other four. This allows deformation to be decoupled from pressure generation.…”

Section: Introductionmentioning

confidence: 99%

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Deformation T-Cup: A new multi-anvil apparatus for controlled strain-rate deformation experiments at pressures above 18 GPa

Hunt

Weidner

McCormack

et al. 2014

Review of Scientific Instruments

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A new multi-anvil deformation apparatus, based on the widely used 6-8 split-cylinder, geometry, has been developed which is capable of deformation experiments at pressures in excess of 18 GPa at room temperature. In 6-8 (Kawai-type) devices eight cubic anvils are used to compress the sample assembly. In our new apparatus two of the eight cubes which sit along the split-cylinder axis have been replaced by hexagonal cross section anvils. Combining these anvils hexagonal-anvils with secondary differential actuators incorporated into the load frame, for the first time, enables the 6-8 multi-anvil apparatus to be used for controlled strain-rate deformation experiments to high strains. Testing of the design, both with and without synchrotron-X-rays, has demonstrated the Deformation T-Cup (DT-Cup) is capable of deforming 1–2 mm long samples to over 55% strain at high temperatures and pressures. To date the apparatus has been calibrated to, and deformed at, 18.8 GPa and deformation experiments performed in conjunction with synchrotron X-rays at confining pressures up to 10 GPa at 800 °C .

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Section: The Designmentioning

confidence: 65%

Section: Introductionmentioning

confidence: 99%

Deformation T-Cup: A new multi-anvil apparatus for controlled strain-rate deformation experiments at pressures above 18 GPa

Hunt

Weidner

McCormack

et al. 2014

Review of Scientific Instruments

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“…As such, there is a need to clarify the effect of pressure and temperature of deformation textures in forsterite. Here, we use the deformation-DIA apparatus (D-DIA, Durham et al 2002;Wang et al 2003) to plastically deform forsterite polycrystals up to 8 GPa and 1673 K and extract the development of LPO in the aggregates as a function of P and T. Experimental textures are then compared with results of the visco-plastic second-order self-consistent model (SO, Ponte Castañeda 2002;Detrez et al 2015) in order to estimate the dominant slip systems in each condition.…”

Section: Introductionmentioning

confidence: 99%

Textures in deforming forsterite aggregates up to 8 GPa and 1673 K

et al. 2016

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“…Instead, we discuss some applications of self-consistent modeling based on diffraction data to gain insights into slip system activation and texture development. Two previous reviews were concentrated on earlier development (Durham et al, 2002) and studies using energy-dispersive diffraction (Karato and Weidner, 2008). In reviewing scientific results, we will primarily focus on the developments based on monochromatic powder diffraction and variable monochromatic single-crystal (quasi-Laue) diffraction, as well as high-pressure tomographic imaging.…”

Section: Introductionmentioning

confidence: 99%

Recent advances in high pressure and temperature rheological studies

2010

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Rheological studies at high pressure and temperature using in-situ X-ray diffraction and imaging have made significant progresses in recent years, thanks to a combination of recent developments in several areas: (1) advances in synchrotron X-ray techniques, (2) advances in deformation devices and the abilities to control pressure, temperature, stress, strain and strain rates, (3) theoretical and computational advances in stress determination based on powder and single crystal diffraction, (4) theoretical and computational advances in modeling of grain-level micromechanics based on elasto-plastic and visco-plastic self-consistent formulations. In this article, we briefly introduce the experimental techniques and theoretical background for in-situ high pressure, high temperature rheological studies, and then review recent studies of rheological properties of major mantle materials. Some currently encountered issues have prompted developments in single-crystal quasi-Laue diffraction for complete stress tensor determination and textural evolution of poly-phased composites based on X-ray microtomography. Future prospects are discussed.

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New Developments in Deformation Experiments at High Pressure

Cited by 47 publications

References 105 publications

Deformation T-Cup: A new multi-anvil apparatus for controlled strain-rate deformation experiments at pressures above 18 GPa

Deformation T-Cup: A new multi-anvil apparatus for controlled strain-rate deformation experiments at pressures above 18 GPa

Textures in deforming forsterite aggregates up to 8 GPa and 1673 K

Recent advances in high pressure and temperature rheological studies

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