New HexMat papers on measuring volumetric texture of polycrystalline materials with ultrasound.
Two papers have recently been published on measuring volumetric texture of polycrystalline materials with ultrasound:
Direct Volumetric Measurement of Crystallographic texture using acoustic waves, Bo Lan, T. Ben Britton, Tea-Sung Jun, Weimin Gan, Michael Hofmann, Fionn P.E. Dunne, Michael J.S. Lowe, Acta Materialia, 2018
Powered by a general theoretical platform that links the polycrystal texture with acoustic wave speeds via a simple convolution relationship, rapid non-destructive measurements of volumetric texture are achieved using the conventional water-bath ultrasonic system. The results of seven representative hexagonal and cubic samples are successfully validated against the well-established neutron diffraction technique.
By introducing a theoretical platform that links polycrystal wave speed with crystallographic texture through a simple convolution relationship, the well-established resonant ultrasound spectroscopy, which measures elastic constants from natural frequencies of the samples, can be easily used for non-destructive evaluation of bulk texture.
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Department of Materials