Transition of solidification path in nonequilibrium solidification of Ti–48Al–8Nb alloy
来源期刊：Rare Metals2016年第1期
论文作者：Tan He Rui Hu Jie-Ren Yang Tie-Bang Zhang Jin-Shan Li
文章页码：48 - 53
摘 要：The solidification behavior of Ti-48Al-8Nb alloy under nonequilibrium solidification conditions was studied by electromagnetic levitation technique.The solidification conditions are different undercooling（△T）under the same cooling condition and different cooling methods at the same undercooling condition,respectively.In different undercooling conditions,when the undercooling is above a critical value（△T*≈211K）,a remarkable morphological transition from typical hypoperitectic solidification to a sole solidification of the(3 phase resulting in the suppression of the peritectic reaction occurs.For melts with different cooling conditions at the same undercooling（△T≈85 K）,the melt was rapidly cooled by quenching them in cooling media.With cooling rate increasing,a transition from β phase to peritectic α phase solidification mode is revealed for Ti-48Al-8Nb alloy.
Tan He，Rui Hu，Jie-Ren Yang，Tie-Bang Zhang，Jin-Shan Li
The State Key Laboratory of Solidification Processing,School of Materials Science and Engineering,Northwestern Polytechnical University
摘 要：The solidification behavior of Ti-48Al-8Nb alloy under nonequilibrium solidification conditions was studied by electromagnetic levitation technique.The solidification conditions are different undercooling（△T）under the same cooling condition and different cooling methods at the same undercooling condition,respectively.In different undercooling conditions,when the undercooling is above a critical value（△T*≈211K）,a remarkable morphological transition from typical hypoperitectic solidification to a sole solidification of the(3 phase resulting in the suppression of the peritectic reaction occurs.For melts with different cooling conditions at the same undercooling（△T≈85 K）,the melt was rapidly cooled by quenching them in cooling media.With cooling rate increasing,a transition from β phase to peritectic α phase solidification mode is revealed for Ti-48Al-8Nb alloy.
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