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Optimization of casting process parameters for synthesis of Al-Nb-B master alloy

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Jha, Shristy, Mandal, Animesh and Srirangam, Prakash (2018) Optimization of casting process parameters for synthesis of Al-Nb-B master alloy. JOM . doi:10.1007/s11837-018-3125-4 (In Press)

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Official URL: http://dx.doi.org/10.1007/s11837-018-3125-4

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Abstract

Al-Nb-B master alloys were synthesized using commercial pure aluminum, niobium, and KBF4 salts. Two different sources of Nb (pure Nb powder and Al-60%Nb powder) were used to prepare the master alloy. Casting process parameters such as reaction time and melt stir time interval were varied to enhance the formation of in situ intermetallic particles in the master alloys. The size, shape and distribution of intermetallic particles in these master alloys were studied using microscopy techniques. The results show that the Al-5Nb-1B master alloy prepared with Al-60%Nb powders has a uniform distribution of intermetallic particles as compared to the master alloy prepared with pure Nb powders. Increase in boron content from 1 wt.% to 2 wt.% in the master alloys resulted in a higher fraction of intermetallic particles. Among all the master alloys synthesized, Al-5Nb-2B was observed to have the highest number of well-distributed intermetallic particles which could act as potential grain refiners of aluminum alloys.

Item Type: Journal Article
Subjects: T Technology > TS Manufactures
Divisions: Faculty of Science > WMG (Formerly the Warwick Manufacturing Group)
Library of Congress Subject Headings (LCSH): Aluminum alloys -- Mechanical properties, Aluminum founding, Intermetallic compounds, Inoculation (Founding), Grain boundaries
Journal or Publication Title: JOM
Publisher: Springer
ISSN: 1047-4838
Official Date: 2018
Dates:
DateEvent
2018Published
17 September 2018Available
17 September 2018Accepted
Date of first compliant deposit: 20 September 2018
DOI: 10.1007/s11837-018-3125-4
Status: Peer Reviewed
Publication Status: In Press
Access rights to Published version: Open Access

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