Materials science forum · 2015 · 14 citations · 11 references
EngineeringMaterials EngineeringMaterials ScienceMaterials ProcessingMetallic MaterialsMetallurgyAlloy SolidificationAlloysGrain RefinementIntermetallic CompoundsMicrostructure EvolutionSolidification MicrostructureAlloy Solidification MicrostructureBinary Eutectic AlloysEutectic Nucleation MechanismsGrain RefinersHeterogeneous NucleationIntermetallic FormationMicrostructureTernary Eutectic Alloys
The effect of Al-5Ti-1B grain refiner addition on solidification microstructure, especially the formation of the binary eutectic (Al)+Al 15 (Fe,Mn) 3 Si 2 was investigated in Al-5Mg-2Si-0.7Mn-1.1Fe (wt.%) alloy. The experimental results showed that the solidification microstructure were consisted of primary α-Al phase, inter dendritic binary eutectic (Al)+Al 15 (Fe,Mn) 3 Si 2 , and ternary eutectic (Al+Mg 2 Si+Al 15 (Fe,Mn) 3 Si 2 ). The heterogeneous nucleation of the primary (Al) phase in the alloys was greatly enhanced by the Al-5Ti-1B grain refiner, refining the (Al) grains significantly. The subsequent binary eutectic was nucleated on these refined (Al) phase. Consequently, the size of Al 15 (Fe,Mn) 3 Si 2 phase with a Chinese script morphology in the binary eutectic was greatly refined, without much change in the secondary branch spacing.
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Grain refining mechanism in the Al/Al–Ti–B system
Z. Fan, Yufeng Wang, Yijie Zhang et al. · Acta Materialia · 2014 · 589 citations