The axial macrosegregation and relevant microstructure evolution of Fe–Ni peritectic alloys directionally solidified under different convection strength were discussed using pure diffusion model, boundary layer convection model and the Scheil equation. Comparing with the experiments of Fe–Ni alloys conducted in resistance heating and induction heatinBridgman system, it was found that the predictions of boundary layer convection model areed well with the experimental results of induction heating drectional solidification when the convection strength parameters lies in the region 1.7<λ≤2, indicating that the model can be used to predict the axial macrosegregation and microstructures evolution of peritectic alloys.
LUO Liang-Shun
,
FU Heng-Zhi
,
ZHANG Yu-Min
,
LI Xin-Zhong
,
SU Pan-Qiang
,
GUO Jing-Jie
. CONVECTION EFFECTS AND BANDING STRUCTURE FORMATION MECHANISM DURING DIRECTIONAL SOLIDIFICATION OF PERITECTIC ALLOYS
II. Theoretical Analysis[J]. Acta Metall Sin, 2011
, 47(3)
: 284
-290
.
DOI: 10.3724/SP.J.1037.2010.00486
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