کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1791278 | 1524467 | 2013 | 4 صفحه PDF | دانلود رایگان |

The effect of the growth velocity on the microstructure evolution of Cu–1.54 wt% Cr alloy under directional solidification was investigated. The cellular eutectic structure was observed at 50 μm/s. However, a centered Cr-rich β dendritic structure surrounded by a layer of Cu-rich α phase and a eutectic structure between Cu-rich α phase and Cr-rich β phase were observed when a sample solidified at a rate faster than 50 μm/s. A microstructure of a centered Cr-rich β equiaxed dendritic structure covered by a Cu-rich α phase grew at temperatures higher than the eutectic interface temperature. This paper explains the mechanism of the microstructure formation as a function of growth velocity.
► Directional solidification experiments were carried out for the Cu–1.54 wt%Cr alloy.
► Eutectic planar was shown in a low growth velocity.
► Cr-rich β equiaxed dendritic structure was presented for velocities>50 μm/s.
► A centered Cr-rich β dendritic structure surrounded by a layer of Cu-rich α phase.
► The mechanism of the microstructure formation as a function of velocity was explained.
Journal: Journal of Crystal Growth - Volume 362, 1 January 2013, Pages 58–61