Plastic deformation experiments to high strain on mantle transition zone minerals wadsleyite and ringwoodite in the rotational Drickamer apparatus

Hustoft, J. W.; Amulele, George; Ando, Jun–ichi; Otsuka, Kazuhiko; Du, Zhuofei; Jing, Zhi-Cheng; Karato, Shun‐ichiro

doi:10.1016/j.epsl.2012.11.028

Cited by 29 publications

(31 citation statements)

References 27 publications

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“…However, the relative differences between both screw dislocations are found to be equal. Nevertheless, the values of t p obtained in this study are more in line with what can be expected from experiments (Nishihara et al 2008;Kawazoe et al 2013;Hustoft et al 2013;Farla et al 2015).…”

Section: Discussionsupporting

confidence: 92%

“…They involve dislocations dissociated into collinear partials. Numerous deformation experiments have been conducted to investigate the plasticity of wadsleyite (Chen et al 1998;Thurel and Cordier 2003;Thurel et al 2003aThurel et al , 2003bNishihara et al 2008;Farla et al 2015;Hustoft et al 2013;Kawazoe et al 2010Kawazoe et al , 2013. Despite a considerable amount of mechanical data obtained under laboratory conditions, it remains experimentally impossible to derive constitutive equations related to the extremely low-strain rate conditions of the Earth's mantle without the need of extrapolations.…”

Section: Introductionmentioning

confidence: 99%

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Modeling dislocation glide and lattice friction in Mg₂SiO₄wadsleyite in conditions of the Earth’s transition zone

Ritterbex

Carrez

2016

American Mineralogist

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Thermally activated dislocation glide in Mg 2 SiO 4 wadsleyite at 15 GPa has been modeled to investigate its potential contribution to plastic deformation of wadsleyite in the Earth's transition zone. Modeling is based on a multiphysics approach that allows calculating the constitutive equations associated with single slip for a wide range of temperatures and strain rates typical for the laboratory and the Earth's mantle. The model is based on the core structures of the rate limiting ½<111>{101} and [100](010) dissociated screw dislocations. After quantifying their lattice friction, glide is modeled through an elastic interaction model that allows calculating the critical configurations that trigger elementary displacements of dissociated dislocations. The constitutive relations corresponding to glide are then deduced with Orowan's equation to describe the average intracrystalline plasticity. The high stresses predicted by the model are found to be in good agreement with experimental data on plastic deformation of wadsleyite at high-pressure conditions. Moreover, it is found that even at appropriate mantle strain rates, glide of dislocations remain difficult with critical resolved shear stress (CRSS) values typically larger than 100 MPa. This implies the inefficiency of dislocation glide to the overall plastic deformation of Mg 2 SiO 4 wadsleyite under transition zone conditions.

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Section: Discussionsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Modeling dislocation glide and lattice friction in Mg₂SiO₄wadsleyite in conditions of the Earth’s transition zone

Ritterbex

Carrez

2016

American Mineralogist

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“…Nevertheless, results from deformation experiments in the Rotational-Drickamer Apparatus (RDA) at pressures up to 20 GPa have been reported. 16,21 Greater hydrostatic pressures can be generated using Kawai-type apparatus 19 than in DIA type devices. Variations on the original Kawai-type design 35,41,42 have made this style of apparatus more user-friendly and the most common multianvil apparatus in use today.…”

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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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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“…The high-temperature rheology of olivine has been the subject of extensive experimental research, but only in the last decade has instrumentation (Karato and Weidner 2008;Weidner et al 2010) been available to conduct quantitative experiments at the pressures suitable to the upper mantle. These new high-pressure deformation experiments (Li et al 2004;Chen et al 2006;Burnley and Zhang 2008;Nishihara et al 2008;Karato and Weidner 2008;Raterron et al 2007Raterron et al , 2009Raterron et al , 2011Raterron et al , 2012Raterron et al , 2013Karato 2009;Kawazoe et al 2009Kawazoe et al , 2010Durham et al 2009;Mei et al 2010;Long et al 2011;Hilairet et al 2012;Hustoft et al 2013) rely on in situ synchrotron diffraction to monitor the elastic strain of lattice planes within the sample during deformation. Stress in the specimen is typically calculated from the differential lattice strains using a method developed by Singh et al (1998), which assumes that the polycrystal is in a Reuss state of stress.…”

Section: Introductionmentioning

confidence: 99%

Elastic plastic self-consistent (EPSC) modeling of plastic deformation in fayalite olivine

Burnley

2015

American Mineralogist

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Elastic plastic self-consistent (EPSC) simulations are used to model synchrotron X-ray diffraction observations from deformation experiments on fayalite olivine using the deformation DIA apparatus. Consistent with results from other in situ diffraction studies of monomineralic polycrystals, the results show substantial variations in stress levels among grain populations. Rather than averaging the lattice reflection stresses or choosing a single reflection to determine the macroscopic stress supported by the specimen, an EPSC simulation is used to forward model diffraction data and determine a macroscopic stress that is consistent with lattice strains of all measured diffraction lines. The EPSC simulation presented here includes kink band formation among the plastic deformation mechanisms in the simulation. The inclusion of kink band formation is critical to the success of the models. This study demonstrates the importance of kink band formation as an accommodation mechanism during plastic deformation of olivine as well as the utility of using EPSC models to interpret diffraction from in situ deformation experiments.

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Plastic deformation experiments to high strain on mantle transition zone minerals wadsleyite and ringwoodite in the rotational Drickamer apparatus

Cited by 29 publications

References 27 publications

Modeling dislocation glide and lattice friction in Mg₂SiO₄wadsleyite in conditions of the Earth’s transition zone

Modeling dislocation glide and lattice friction in Mg₂SiO₄wadsleyite in conditions of the Earth’s transition zone

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

Elastic plastic self-consistent (EPSC) modeling of plastic deformation in fayalite olivine

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Plastic deformation experiments to high strain on mantle transition zone minerals wadsleyite and ringwoodite in the rotational Drickamer apparatus

Cited by 29 publications

References 27 publications

Modeling dislocation glide and lattice friction in Mg2SiO4wadsleyite in conditions of the Earth’s transition zone

Modeling dislocation glide and lattice friction in Mg2SiO4wadsleyite in conditions of the Earth’s transition zone

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

Elastic plastic self-consistent (EPSC) modeling of plastic deformation in fayalite olivine

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Modeling dislocation glide and lattice friction in Mg₂SiO₄wadsleyite in conditions of the Earth’s transition zone

Modeling dislocation glide and lattice friction in Mg₂SiO₄wadsleyite in conditions of the Earth’s transition zone