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Title: | Grain refining potency of Nb-B inoculation on Al-12Si-0.6Fe-0.5Mn alloy |
Authors: | Bolzoni, L Nowak, M Hari Babu, N |
Keywords: | Heterogeneous nucleation;Metals and alloys;Microstructure;Nb-B inoculation;Thermal analysis |
Issue Date: | 2015 |
Publisher: | Elsevier Ltd |
Citation: | Journal of Alloys and Compounds, 623 pp. 79 - 82, 2015 |
Abstract: | In a recent work we reported that the combined addition of Nb and B has higher grain refinement effectiveness than the addition of these individual chemical elements. In this work a commercial Al-12Si-0.6Fe-0.5Mn alloy is employed to fully characterise the refining potency of Nb-B inoculation. It is found that the addition of Nb powder and KBF4 flux to Al-Si melt introduces potent nuclei with low lattice mismatch with the primary α-Al dendrites (i.e. low undercooling) and, thus, promote noteworthy grain refinement through heterogeneous nucleation. Nb-B inoculation induces a significant increment of the volumetric number of grains, decreases the undercooling needed for solidification and makes the grain size of the Nb-B inoculated material less sensitive to the cooling rate employed to solidify the material. |
Description: | This article has been made available through the Brunel Open Access Publishing Fund. |
URI: | http://www.sciencedirect.com/science/article/pii/S092583881402489X http://bura.brunel.ac.uk/handle/2438/10107 |
DOI: | http://dx.doi.org/10.1016/j.jallcom.2014.10.069 |
ISSN: | 0925-8388 |
Appears in Collections: | Brunel OA Publishing Fund Brunel Centre for Advanced Solidification Technology (BCAST) |
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