Effect of electric current pulses on TiB2 particle dispersion in aluminum alloy melt

•The ECPs can reduce the binding force between TiB2 particles.•The ECPs can disperse loose aggregations of TiB2 particles.•The ECPs can expel TiB2 particles from the cluster.•The ECP parameters can influence on the TiB2 particle cluster dispersion. The effect of electric current pulses (ECPs) on the...

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Bibliographic Details
Published in:Materials letters 2020-09, Vol.274, p.127981, Article 127981
Main Authors: Lyu, Yenan, Ding, Ren, Xu, Guangming, Jiang, Tao
Format: Article
Language:English
Subjects:
Aluminum base alloys
Cast
Current pulses
Electric current pulses
Electric currents
Materials science
Metals and alloys
Microstructure
Ohmic dissipation
Peltier effects
Pinch force
Resistance heating
Shock waves
TiB2 particles
Titanium diboride
Wave dispersion
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Summary:•The ECPs can reduce the binding force between TiB2 particles.•The ECPs can disperse loose aggregations of TiB2 particles.•The ECPs can expel TiB2 particles from the cluster.•The ECP parameters can influence on the TiB2 particle cluster dispersion. The effect of electric current pulses (ECPs) on the dispersion of TiB2 particles is investigated. The results demonstrate that Joule heating and the Peltier effect can reduce the binding force between TiB2 particles in the melt. The induced magnetic pressure, pinch force gradient and electromagnetic shock wave can disperse loose aggregations of TiB2 particles, thereby decreasing the size of the TiB2 particle clusters. The ECP parameters are found to have a large influence on the TiB2 particle cluster dispersion.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2020.127981