To investigate the effect of solidification parameters on the solidification path and microstructure evolution of Ti-45Al-5Nb（at.%） alloy, Bridgman-type directional solidification and thermodynamics calculations were performed on the alloy. The microstructures, micro-segregation and solidification path were investigated.The results show that the β phase is the primary phase of the alloy at growth rates of 5-20 μm·s-1 under the temperature gradients of 15-20 K·mm-1, and the primary phase is transformed into an α phase at relatively higher growth rates(V ＞20 μm·s-1). The mainly S-segregation and β-segregation can be observed in Ti-45Al-5Nb alloy at a growth rate of 10 μm·s-1 under a temperature gradient of 15 K·mm-1. The increase of temperature gradient to 20 K·mm-1 can eliminate β-segregation, but has no obvious effect on S-segregation. The results also show that 5 at.% Nb addition can expand the β phase region, increase the melting point of the alloy and induce the solidification path to become complicated. The equilibrium solidification path of Ti-45Al-5Nb alloy can be described as L L→β L+β L+β→αα+βR β→ααα→γα+γα→α2+γγR+（α2+γ）, in which βR and γR mean the residual β and γ
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机译：Microstructural evolution and mechanical properties of FeCoCrNiCu high entropy alloys:a microstructure-based constitutive model and a molecular dynamics simulation study
机译：Etude du Comportement micro-mecanique d'Une Vitroceramique a subst de siO2-al2O3-Li2O en Liaison avec la microstructure（siO2-al2O3-Li2O玻璃陶瓷的微观力学行为及其与微结构的关系研究）
