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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Veröffentlicht in:	Materials letters 2020-09, Vol.274, p.127981, Article 127981
Hauptverfasser:	Lyu, Yenan, Ding, Ren, Xu, Guangming, Jiang, Tao
Format:	Artikel
Sprache:	eng
Schlagworte:	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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Zusammenfassung:	•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