What does mechanical joining include?

Mechanical joining encompasses a variety of methods used to connect two or more components without altering their material properties through fusion or chemical bonding. This includes mechanical fasteners like screws, bolts, and nuts, which allow for ease of assembly and disassembly. Additionally, compression joints are used where two parts are pressed together, creating a secure connection.

Welding is distinct from purely mechanical methods in that it involves melting the base materials to create a fusion joint, which may not be reversible. Bonding, while also a joining method, typically involves adhesive materials and might not be classified strictly under mechanical joining.

The correct answer encompasses all of these aspects, illustrating the broad range of mechanical joining techniques available in engineering and manufacturing processes.