Paper Title:
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.

  Info
Periodical
Materials Science Forum (Volumes 561-565)
Main Theme
Edited by
Young Won Chang, Nack J. Kim and Chong Soo Lee
Pages
937-940
DOI
10.4028/www.scientific.net/MSF.561-565.937
Citation
K. Hirai, T. Ichitsubo, E. Matsubara, N. Tsuji, "Ultrasonic Spectroscopy and X-Ray Diffraction Study for ARB Aluminum", Materials Science Forum, Vols. 561-565, pp. 937-940, 2007
Online since
October 2007
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