Answer :
Final answer:
Autogenous welding is a fusion welding operation where no filler metal is added; instead, the base materials are melted to join them together.
Explanation:
A fusion welding operation in which no filler metal is added is known as autogenous welding. In this type of welding, the same materials being joined are melted together without the use of a separate filler material. This process can be performed using various energy sources such as gas, electricity, or laser. One of the most common examples of autogenous welding is fusion welding performed by blacksmiths throughout history to join iron and steel by heating them to high temperatures and allowing them to fuse together. In contrast to methods that employ an external filler, autogenous welding relies solely on the melting of the base materials themselves to create the joint.
