What is the term for the condition in which fusion occurs over the entire contact surfaces between all adjoining weld beads?

The term for the condition in which fusion occurs over the entire contact surfaces between all adjoining weld beads is known as complete fusion. This ensures that the welds are fully integrated and there are no gaps or unbonded areas at the interfaces between the beads. Achieving complete fusion is essential for maintaining the structural integrity and strength of the welded joint, allowing it to withstand the stresses and conditions it may encounter in service.

In welding practice, complete fusion indicates that the heat and filler material have adequately penetrated and melted the base metals, resulting in a continuous and homogeneous material structure. This is a key factor in producing high-quality welds that meet industry standards.

Other terms, while they may seem synonymous, do not convey this precise meaning. For instance, full fusion may imply a more general sense of adequate melting but might not strictly guarantee that every contacting surface area is fused together as required in complete fusion. Hence, understanding the distinction is vital for weld quality assessment.