Electric Current Induced Liquid Al Deposition, Reaction and Flow on Cu Rails at Rail-Armature Contacts in Railguns

@article{Dutta2008ElectricCI,
  title={Electric Current Induced Liquid Al Deposition, Reaction and Flow on Cu Rails at Rail-Armature Contacts in Railguns},
  author={Indranath Dutta and Liam Delaney and Brookpark Road Cleveland and Carol Persad and Fangqiong Tang},
  journal={2008 14th Symposium on Electromagnetic Launch Technology},
  year={2008},
  pages={1-6}
}
When a railgun is fired, the aluminum armature typically undergoes melting at the rail-armature contacts and deposits liquid metal on the rails. Rail-life is affected by these deposits. Localized aluminum armature melting has been attributed to current crowding and localized Joule heating. This paper reports on (1) characterization of debris on fired rails and their role in rail damage, and (2) experiments to elucidate the role of electric current in the transport of liquefied armature material… CONTINUE READING

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