DOWN

1.  The introduction of a gas to remove contaminants from a system or provide backing during welding.
3.  The junction of members or the edges of members that are to be joined or have been joined.
5.  An assembly whose component parts are joined by welding.
7.  A nonmetallic product resulting from the mutual dissolution of flux and  nonmetallic impurities in some welding and brazing processes.
9.  The melting together of filler metal and base metal, or of base metal only, to produce a weld.
11.  Cavity-type discontinuities formed by gas entrapment during solidification or in a thermal spray deposit.
13.  A device designed to hold and maintain parts in proper relation to each other.
15.  A substance with metallic properties and composed of two or more chemical elements of which at least one is metal.
17.  A component of the electrical circuit that terminates at the arc, molten conductive slag, or base metal.

ACROSS

2.  The short length of filler metal electrode, welding rod, or brazing rod that remains after its use for welding or brazing.
4.  The heat applied to the base metal or substrate to attain and maintain temperature.
6.  Light amplification by stimulated emission of radiation.
8.  A groove melted into the base metal adjacent to the weld toe or weld root and left unfilled by weld metal.
10. An angular edge shape.
12. The act of bringing together the workpieces in preparation for welding.
14. An electrode that provides filler metal.
16. The length of tungsten electrode extending beyond the end of the gas nozzle.
18. The mechanical working of metals using impact blows 

ANSWERS

DOWN

1.   purge
3.   joint
5.   weldment
7.   slag
9.   fusion
11. porosity
13. fixture
15. alloy
17. electrode

ACROSS

2.   stub
4.   preheat
6.   laser
8.   undercut
10. bevel
12. fit
14. consumable
16. stickout
18. peening