Ultrasonic Spectroscopy and X-Ray Diffraction Study for ARB Aluminum

K. Hirai; T. Ichitsubo; Eiichiro Matsubara; Nobuhiro Tsuji

doi:10.4028/www.scientific.net/MSF.561-565.937

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HomeMaterials Science ForumMaterials Science Forum Vols. 561-565Ultrasonic Spectroscopy and X-Ray Diffraction...

Ultrasonic Spectroscopy and X-Ray Diffraction Study for ARB Aluminum

Abstract:

It has been reported that accumulative-roll-bonded (ARB) aluminum having ultrafine grains shows an intriguing mechanical character that it is hardened by annealing and contrarily softened by deformation. In order to understand the mechanism of such a peculiar phenomenon, we have investigated the dislocation damping with ultrasonic spectroscopy and total amount of dislocations with the X-ray diffraction measurement. From the present measurements, we have found that the dislocations introduced by the ARB process are tangled but can be released with a large stress. Such dislocations accumulated in ultrafine grains play a significant role in the plastic deformation.

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Periodical:

Materials Science Forum (Volumes 561-565)

Pages:

937-940

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.561-565.937

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Online since:

October 2007

Authors:

K. Hirai, T. Ichitsubo, Eiichiro Matsubara, Nobuhiro Tsuji

Keywords:

ARB Aluminum, Hall Plot, Ultrasonic Damping, X-Ray Diffraction (XRD)

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