Paper Title:
Work Hardening and Flow Softening of γ-TiAl Containing Ni
  Abstract

This paper presents the true stress - strain curves and data analyses of a Ni-containing TiAl and its reference alloy based on the isothermal compression tests at 1000°C and 0.01 - 1.0s-1 strain rates. The results show that the minor Ni addition makes the flow softening coming sooner and therefore significantly lowers the peak stress. Those effects, in addition with a better balance between the work hardening and flow softening during hot deformation, improve the steady state flow behavior of TiAl. The Ni-influence mechanisms are also suggested based on the TEM observation of dislocation configurations and lamellar breakdown during the deformation.

  Info
Periodical
Materials Science Forum (Volumes 449-452)
Edited by
S.-G. Kang and T. Kobayashi
Pages
833-836
DOI
10.4028/www.scientific.net/MSF.449-452.833
Citation
J. H. Zhang, K. Xia, E. Strom, Z. Y. Zhong, C. H. Li, "Work Hardening and Flow Softening of γ-TiAl Containing Ni", Materials Science Forum, Vols. 449-452, pp. 833-836, 2004
Online since
March 2004
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$32.00
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