Effect of lattice preferred orientation on lattice strains in polycrystalline materials deformed under high pressure: Application to hcp-Co

Merkel, Sébastien; Yagi, T.

doi:10.1016/j.jpcs.2006.05.025

Cited by 11 publications

(13 citation statements)

References 37 publications

(81 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is probably related to details of the experimental setup such as diamond alignment and sample loading. This has been also observed on other samples in DAC radial diffraction experiments (Merkel et al 2005, Merkel andYagi 2005b). Interestingly, this offset is not observed in the measured diffraction intensities, indicating that the texture and plastic deformation of the sample is indeed axisymmetric.…”

Section: Orientation Of Stress In the Dacsupporting

confidence: 77%

Texture development and elastic stresses in magnesiowűstite at high pressure

et al. 2006

Self Cite

View full text Add to dashboard Cite

Cubic magnesiowűstite has been deformed in a diamond anvil cell at room temperature. GPa and 18 GPa, respectively. The diffraction images, obtained with the radial diffraction technique, are analyzed using both single peak intensities and a Rietveld method. For all samples, we observe a [100] fiber texture but the texture strength decreases with increasing iron content. This texture pattern is consistent with {110}<1-10> slip. The images were also analyzed for stress, elastic strains and elastic anisotropy. In general, the stress measured in magnesiowűstite samples is lower than previously measured on MgO. The elastic anisotropy deduced from the X-ray measurements shows a broad agreement with models based on measurements with other techniques.

show abstract

Section: Orientation Of Stress In the Dacsupporting

confidence: 77%

Texture development and elastic stresses in magnesiowűstite at high pressure

et al. 2006

Self Cite

View full text Add to dashboard Cite

show abstract

“…For olivine, given the diffraction geometry imposed by the D-DIA apparatus with a maximum allowed diffraction angle of 2 ≈ 6.5°, the three most prominent diffraction peaks are (hkl) = (130), (131), and (112). The relationship between the value of stress deduced from lattice strain from a group of grains and the value of stress applied externally to a sample, though discussed elsewhere [Merkel, 2006;Merkel and Yagi, 2006;Karato, 2009], has not yet been well established. For present purposes, we approximate the stress supported by the aggregate as the arithmetic average of stresses calculated from the (130), (131), and (112) lattice reflections.…”

Section: Methodsmentioning

confidence: 99%

Experimental constraints on the strength of the lithospheric mantle

Mei¹,

Suzuki²,

Kohlstedt³

et al. 2010

J. Geophys. Res.

153

237

View full text Add to dashboard Cite

[1] To provide a better understanding of rheological properties of mantle rocks under lithospheric conditions, we carried out a series of experiments on the creep behavior of polycrystalline olivine at high pressures (∼4-9 GPa), relatively low temperatures (673 ≤ T ≤ 1273 K), and anhydrous conditions, using a deformation-DIA. Differential stress and sample displacement were monitored in situ using synchrotron X-ray diffraction and radiography, respectively. Experimental results were fit to the low-temperature. On the basis of this analysis, the low-temperature plasticity of olivine deformed under anhydrous conditions is well constrained by our data with a Peierls stress of s P = 5.9 ± 0.2 GPa, a zero-stress activation energy of E k (0) = 320 ± 50 kJ mol, and A P = 1.4 × 10. Compared with published results for high-temperature creep of olivine, a transition from low-temperature plasticity to high-temperature creep occurs at ∼1300 K for a strain rate of ∼10 −5 s −1 . For a geological strain rate of 10 −14 s −1 , extrapolation of our low-temperature flow law to 873 K, the cutoff temperature for earthquakes in the mantle, yields a strength of ∼600 MPa. The low-temperature, high-stress flow law for olivine in this study provides a solid basis for modeling tectonic processes occurring within Earth's lithosphere.

show abstract

“…Some groups (e.g., Hilairet et al, 2010;Burnley and Zhang, 2008) have attempted the elasto-plastic self-consistent (EPSC) modeling to address this issue, following the success in neutron residual stress analyses (Turner and Tome, 1994) and later on deformation experiments in the DAC (e.g., Merkel and Yagi, 2006).…”

Section: Elasto-plastic Self-consistent Modelingmentioning

confidence: 99%

“…EPSC models have been successful in reproducing lattice strain measured by X-ray diffraction and obtaining information on slip system activities on high-symmetry systems (Merkel and Yagi, 2006), and quartz (Burnley and Zhang, 2008).…”

Section: Elasto-plastic Self-consistent Modelingmentioning

confidence: 99%

Recent advances in high pressure and temperature rheological studies

2010

View full text Add to dashboard Cite

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.

show abstract

Effect of lattice preferred orientation on lattice strains in polycrystalline materials deformed under high pressure: Application to hcp-Co

Cited by 11 publications

References 37 publications

Texture development and elastic stresses in magnesiowűstite at high pressure

Texture development and elastic stresses in magnesiowűstite at high pressure

Experimental constraints on the strength of the lithospheric mantle

Recent advances in high pressure and temperature rheological studies

Contact Info

Product

Resources

About