Paper Title:
Visualization and Quantification of Severe Internal Deformation on Compressive Torsion Process
  Abstract

Compressive torsion process (CTP) which was developed by authors is effective process for grain and precipitates refinement of metallic materials with a severe plastic deformation. In the CTP, a cylindrical specimen is subjected to simultaneous compressive and torsional loading without change in its shape. However, metal flow and strain distribution in the processed specimen are not cleared, because the deformation is very large and complicated. In the present work, visualization of internal deformation of specimen processed by CTP was investigated using dual alloy etching technique. Two kinds of aluminum alloy were prepared by cutting on fan-like shape and alternately placed to a cylindrical shape. After CTPing, contrasts in the specimen were observed by polishing and etching. The internal distribution of shear strain was quantified by measuring the displacement of interface between the alloys. As a result, the visualization and quantification of internal deformation was successfully carried out using the technique. The internal strain distribution was varied not only in radial direction but also in longitudinal direction because of frictional constraint on the lateral face. A laminate contrast of the alloys observed on the vertical cross section was well related with the strain distribution in the specimen.

  Info
Periodical
Materials Science Forum (Volumes 654-656)
Main Theme
Edited by
Jian-Feng Nie and Allan Morton
Pages
1247-1250
DOI
10.4028/www.scientific.net/MSF.654-656.1247
Citation
Y. Kume, M. Motohashi, M. Kobashi, N. Kanetake, "Visualization and Quantification of Severe Internal Deformation on Compressive Torsion Process", Materials Science Forum, Vols. 654-656, pp. 1247-1250, 2010
Online since
June 2010
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$32.00
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