Operational texture analysis

Kallend, J. S.; Kocks, U.F.; Rollett, Anthony D.; Wenk, Hans‐Rudolf

doi:10.1016/0921-5093(91)90355-q

Cited by 310 publications

(104 citation statements)

References 8 publications

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“…Background values were measured for each sample and defocusing values were adjusted using a randomly oriented HA coating. Inverse pole figures were derived from a discretized orientation distribution (OD) that was constructed by using available measured pole figures as inputs to the WIMV algorithm in the popLA package [38]. The recalculated pole figures from the OD had errors of less than 1% when compared with the measured pole figures.…”

Section: Methodsmentioning

confidence: 99%

Crystallographic texture in pulsed laser deposited hydroxyapatite bioceramic coatings

et al. 2007

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The orientation texture of pulsed laser deposited hydroxyapatite coatings was studied by X-ray diffraction techniques. Increasing the laser energy density of the KrF excimer laser used in the deposition process from 5 to 7 J/cm 2 increases the tendency for the c-axes of the hydroxyapatite grains to be aligned perpendicular to the substrate. This preferred orientation is most pronounced when the incidence direction of the plume is normal to the substrate. Orientation texture of the hydroxyapatite grains in the coatings is associated with the highly directional and energetic nature of the ablation plume. Anisotropic stresses, transport of hydroxyl groups and dehydroxylation effects during deposition all seem to play important roles in the texture development.

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Section: Methodsmentioning

confidence: 99%

Crystallographic texture in pulsed laser deposited hydroxyapatite bioceramic coatings

et al. 2007

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“…Two well known standard algorithms for pole-®gure inversion are the harmonic method, which describes the ODF as a series of spherical harmonic functions, and the WIMV method, which directly solves the system of linear equations by discretizing both the pole ®gure and the ODF into cells (Kallend, 1998). Nowadays, one can rely on ef®cient program packages for all the complicated analysis involved (Kallend et al, 1991;Wenk et al, 1998). Finally, from the recalculated pole ®gures, we can straightforwardly extract the POF values to be inserted in the mathematical model [equation (1)] as the pole densities in m.r.d.…”

Section: Pole Distribution Function As a Preferred Orientation Factormentioning

confidence: 99%

Application of quantitative texture analysis to Rietveld profile refinement of neutron diffraction patterns of a zircaloy sample

et al. 2001

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The possibility of extending the Rietveld method to incorporate textured polycrystalline materials is demonstrated with a zircaloy sample. By assigning the pole densities obtained by separate texture analysis to the preferred orientation factors (POFs) in the mathematical model of the Rietveld method, good pro®le re®nement results are achieved with the neutron diffraction patterns. The approach of predetermining the individual POF values from quantitative texture information can be used to improve re®nement of other parameters related to the analysis of composite phases as well as to crystal structure re®nement.

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“…For the measurement of the texture evolution in single crystals, a Philips X'Pert MRD Goniometer was used with monochromatic Cu-K radiation. POPLA software [17] was used to extract the texture plots.…”

Section: Experimental Techniquesmentioning

confidence: 99%

Modeling the deformation behavior of Hadfield steel single and polycrystals due to twinning and slip

et al. 2000

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AbstractÐStress±strain responses of single and polycrystals of Had®eld steel were modeled using a viscoplastic self-consistent approach. A unique hardening formulation was proposed in the constitutive model incorporating length scales associated with spacing between twin lamellae and grain boundaries. TEM observations lend further support to the length scales incorporated into the constitutive model. Many of the experimental ®ndings were made on " 111 and " 144 crystal orientations deformed in tension, displaying ®ne twin lamellae at small strains in addition to slip in intra-twin regions. A natural outcome of the model was the small deformation activity inside the twinned regions and higher deformations between the twins. The model utilized dislocation density as a state variable and predicted the stress±strain responses and texture evolution in single crystals accurately over a broad range of strains. The responses of polycrystals with three grain sizes (100, 300, and 1000 mm) were also captured closely with the model in addition to the twin volume fraction evolution with increasing deformation. Based on the simulations, it was possible to explain unequivocally the upward curvature in stress±strain curves in the single crystals and in coarse grained polycrystals of Had®eld steel. Overall, the combined experimental and modeling e orts provide a reliable tool to characterize slip±twin interaction in low stacking fault energy f

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Operational texture analysis

Cited by 310 publications

References 8 publications

Crystallographic texture in pulsed laser deposited hydroxyapatite bioceramic coatings

Crystallographic texture in pulsed laser deposited hydroxyapatite bioceramic coatings

Application of quantitative texture analysis to Rietveld profile refinement of neutron diffraction patterns of a zircaloy sample

Modeling the deformation behavior of Hadfield steel single and polycrystals due to twinning and slip

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