Experimental measurement of lattice strain pole figures using synchrotron x rays

作者: M. P. Miller , J. V. Bernier , J.-S. Park , A. Kazimirov

DOI: 10.1063/1.2130668

关键词: Materials scienceDiffractionX-ray crystallographyMonochromatic colorNeutron diffractionSynchrotronPowder diffractionCrystalliteDebyeOpticsInstrumentation (computer programming)

摘要: This article describes a system for mechanically loading test specimens in situ the determination of lattice strain pole figures and their evolution multiphase alloys via powder diffraction. The data from these experiments provide insight into three-dimensional mechanical response polycrystalline aggregate represent an extremely powerful material model validation tool. Relatively thin (0.5mm) iron/copper were axially strained using frame beyond macroscopic yield strength material. was halted at multiple points during deformation to conduct diffraction experiment 0.5×0.5mm2 monochromatic (50keV) x ray beam. Entire Debye rings collected planes ({hkl}’s) both copper iron online image plate detector. Strain constructed by rotating about specimen transverse direction. Ideal patterns superimposed on each purpos...

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