Hello guys, so i decided to start writing on areas related to my field of study... Today's write-up is about methods of joining two or more materials.

Bolts, Screws, and Rivets

These are used to produce a local connection between the parts being joined.

Bolted joints are common and easy to assemble provided the holes have been accurately drilled.

Rivets are widely used in sheet work and they readily give a joint of good strength. The skin panel on an aircraft body contain many examples of the skillful use of rivets to provide joints which can with-stand high stress.
For materials, which are difficult to weld such as aluminium and the joining of dissimilar metals, self-pierced riveted joints, blind fixing and clinching are better alternatives.

Riveting produces permanent connections whereas bolting enables the joints to be dismantled for repair or modification.

Take note that without a sealant this techniques will not give a leak tight joint

Soldering

In soldering, a small gap between the sheets at the overlap is filled with a low melting lead-tin alloy known as a solder. The solder wets the metal and produces an inter-metallic bond

Brazing

This is similar to soldering but uses fillers having higher melting points. Brazed joints usually have better strength than soldered ones. The filler metal must also wet the surfaces to be joined.

Adhesive Bonding

like brazing and soldering, a small gap is used which in this case is filled with adhesive which forms a surface bond with the metal. The type of adhesive used depends on the particular requirements of the joints.

Welding

This is the most important joining method. Most welded joints are made by melting the parents metal / materials on each side of the joint line.