Excess weld reinforcement can establish stress concentrations at the junction with the base metal.

Excess weld reinforcement can establish stress concentrations at the junction with the base metal.

• A. False
• B. True
• C. Not important
• D. Only for thick plates

Answer: (B)

Excess weld reinforcement creates a pronounced geometric change at the weld toe where weld metal meets the base metal. That abrupt transition acts as a notch, concentrating stresses under load and often trapping residual stresses from welding. The result is a higher risk of fatigue cracking or fracture at the weld root or toe, especially under cyclic or tensile loading. So, controlling the weld profile to avoid excess reinforcement and smoothing the toe reduces this stress concentration. Saying it has no effect or is unimportant isn’t accurate, and the idea that this only matters for thick plates ignores the fact that stress concentrations arise from geometry, not just thickness.

Excess weld reinforcement creates a pronounced geometric change at the weld toe where weld metal meets the base metal. That abrupt transition acts as a notch, concentrating stresses under load and often trapping residual stresses from welding. The result is a higher risk of fatigue cracking or fracture at the weld root or toe, especially under cyclic or tensile loading. So, controlling the weld profile to avoid excess reinforcement and smoothing the toe reduces this stress concentration.

Saying it has no effect or is unimportant isn’t accurate, and the idea that this only matters for thick plates ignores the fact that stress concentrations arise from geometry, not just thickness.