Paper Title:
Effect of Third Elements on Pseudoelastic Behavior in Fe3Al Single Crystals
  Abstract

The pseudoelastic behavior of Fe3Al single crystals doped with an extra element (e.g. Ti, V, Cr, Mn, Co, Ni, Si, Ga, Ge) was investigated. In binary Fe-23.0at.%Al crystals with the D03 structure, 1/4[111] superpartial dislocations moved independently dragging the nearest-neighbor anti-phase boundaries (NNAPB) during loading. During unloading, the NNAPB pulled back the superpartials decreasing its energy resulting in a giant pseudoelasticity of which the recoverable strain is about 5 %. Addition of a third element significantly affected the pseudoelastic behavior of Fe3Al single crystals. Mn- or Ga-doped crystal demonstrated a giant pseudoelasticity. In particular, Ga-doping was found to be effective in the enhancement of the pseudoelasticity. On the other hand, the amount of strain recovery decreased upon doping of the other elements. The frictional stress of the superpartials, the back stress of the NNAPB and ordered domain structure in the crystals changed upon doping, which was closely related to the pseudoelastic behavior.

  Info
Periodical
Materials Science Forum (Volumes 561-565)
Main Theme
Edited by
Young Won Chang, Nack J. Kim and Chong Soo Lee
Pages
391-394
DOI
10.4028/www.scientific.net/MSF.561-565.391
Citation
H. Y. Yasuda, T. Kase, S. Minamiguchi, A. Yokoyama, Y. Umakoshi, P.M. Bronsveld, J. T.M. de Hosson, "Effect of Third Elements on Pseudoelastic Behavior in Fe3Al Single Crystals", Materials Science Forum, Vols. 561-565, pp. 391-394, 2007
Online since
October 2007
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$32.00
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