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in phase diagram,formation mechanism of the new γ1 phase,microsegregation induced by adding a high content of alloying element Nb,and the mechanism of the B2/ω phase formation.Some challenges......
,and the natural convection has been confirmed to affect the microsegregation pattern and the dendrite growth velocity.In the directional solidification simulations,two typical temperature gradients were applied......
of the withdrawal rate.As expected,the primary and secondary dendrite arm spacing decreased with increasing withdrawal rate;microsegregation degree and porosity distribution were also varied with different withdrawal rates.The withdrawal rate of 2 mm/min resulted in a noticeable residual microsegregation even after full heat treatment.The samples solidified at 7 mm/min exhibited a high density......
with a modified Scheil formula.It is shown that the addition of Re results in bigger microsegregation of alloying elements in directionally solidified AM3 superalloy.关键词:......
lamellar colony boundaries as discontinuous network in the TiAl alloys owing to the segregation of Mo element. The γ phase forms in the interdentritic microsegregation area when the Mo addition... at different Mo contents under as-cast and as-homogenization treated conditions was analyzed, indicating that excessive Mo addition is prone to cause the microsegregation, thus decreasing the strength......
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on microsegregation behaviors and mush zone stability of GH4169 alloy during solidification process ZHANG Mai-cang, CAO Guo-xin, DONG Jian-xin (School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China) Abstract: The microsegregation behaviors of GH4169 alloy during its solidification process were investigated by remelting tests, SEM and EMPA......
arm spacing decreased,while the amount of intermetallic phases increased.For as-cast Mg-4.5Zn-1Y-xNd-0.5Zr alloys,after solution treatment,microsegregation was eliminated and the shape of eutectic......
ESR ingot production. On the basis of our previous work, a coupled model of solute microsegregation and TiN inclusion growth during solidification has been established. The results demonstrate......
a substantial content of manganese, in agreement with the microsegregation of manganese calculated by Thermo-Calc using the Scheil–Gulliver module. The dissolution of primary carbides caused......