10.17633/rd.brunel.7332854.v1
Leandro Bolzoni
Leandro
Bolzoni
Hari-Babu Nadendla
Hari-Babu
Nadendla
Efficacy of borides in grain refining Al-Si alloys dataset
Brunel University London
2019
Aluminium alloy
grain refinement
niobium compounds show
Metals and Alloy Materials
2019-04-29 10:04:13
Dataset
https://brunel.figshare.com/articles/dataset/Efficacy_of_borides_in_grain_refining_Al-Si_alloys_dataset/7332854
The grain refining
efficacy of titanium, aluminium and niobium borides, as well as niobium
aluminides, introduced via commercial and lab made master alloys on Al-Si
alloys was investigated. Significant grain refinement is achieved via the
introduction of these heterogeneous nuclei regardless of their nature,
stoichiometry of the master alloy, and addition rate. However, the grain
refinement is affected by variable such as contact time and cooling rate. In
the case of borides, the chemical inoculation efficiency is greatly affected by
their thermodynamic stability in molten Al-Si alloys. Conversely, the grain
refining potency of properitectic Al<sub>3</sub>Nb remains unaffected. The
underlying grain refining mechanism was finally investigated using current
model based on the growth restriction factor <i>Q</i> to simultaneously consider the effect of nucleants potency and alloy
chemistry. Among Ti-, Al- and Nb-based borides with similar particle size and
distribution, the latter are the most efficient to grain refine Al-Si alloys.