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- Zhang, Ji, et al.
(författare)
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Work Hardening and Flow Softening of γ-TiAl Containing Ni
- 2004
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Ingår i: Materials Science Forum. - 1662-9752 .- 0255-5476. ; 449-452, s. 833-836
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Tidskriftsartikel (refereegranskat)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 deg. C and 0.01-1.0 s-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.
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