Question

3 distinct zones can be identified in a typical weld joint:

a. Heat-affected zone, fusion zone, and parent material

b. Brittle zone, corrosion zone, and ductile zone

c. Hardened zone, annealed zone, and tempered zone

d. Compressive zone, tensile zone, and shear zone

Answer 1

In a typical weld joint, three distinct zones include the heat-affected zone, the fusion zone, and the parent material. These zones are crucial for understanding the properties and behavior of a welded structure.

Step-by-step explanation:

In a typical weld joint, three distinct zones can be identified. These are:

• Heat-affected zone (HAZ): This area undergoes a thermal cycle but doesn't melt. It is located adjacent to the weld bead and exhibits changes in microstructure due to the heat input during welding.
• Fusion zone (FZ): Also known as the weld metal, it's the region that melts during welding and solidifies to form the joint.
• Parent material: This is the original material or the base metal that is being welded. It is unaffected by the welding process except in the heat-affected zone.

The correct answer for the question about the zones in a weld joint is option (a). Other options like brittle zone, corrosion zone, and ductile zone; hardened zone, annealed zone, and tempered zone; compressive zone, tensile zone, and shear zone are not typically used to describe zones within a weld joint.