uses for making out by scratching or scribing very fine lines on the workpieces - shakir skyllov

IBW is the arc welding process of forming a coalescence of two workpieces(stube or pipe) internally by using tig welding.

The major advantage of this process is that it can form large and complex workpieces in one operation. The finished product has excellent precision and a fine surface finish.

If you are joining together 2 metal pieces by fusing a metal alloy then yes, as long as the melting point is below that of the workpieces.

Riveting - when a solid fastener is placed in a drilled hole and expanded to hold an object in place.

Welding - when a thin wire ('filler') is melted along with the area of bonding on the workpieces, which form a joint when cooled.