==Physics of electron beam heating== Electrons are elementary particles possessing a mass m = 9.1 · 10−31 kg and a negative electrical charge e = 1.6 · 10−19 C. They exist either bound to an atomic nucleus, as conduction electrons in the atomic lattice of metals, or as free electrons in vacuum. Free electrons in vacuum can be accelerated, wi...
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http://en.wikipedia.org/wiki/Electron_beam_welding
(from the article `welding`) In electron-beam welding, the workpiece is bombarded with a dense stream of high-velocity electrons. The energy of these electrons is converted to ...
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http://www.britannica.com/eb/a-z/e/19
A technique for joining materials in which components to be welded are heated by a concentrated beam of high-velocity electrons in a vacuum. See also: Electron, Welding.
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https://www.encyclo.co.uk/local/20687
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