2019•Procedia Structural IntegrityOpen access

Influence of temperature on fracture toughness values in different regions of A-387 Gr. B welded joint

Ivica Čamagić, Simon A. Sedmak, Aleksandar Sedmak, Zijah Burzić

Abstract

The influence of temperature on fracture toughness values in different regions of a welded joint is analysed low-alloyed Cr-Mo steel A-387 Gr. B, designed for high temperature applications. Heterogeneity of microstructure and properties of welded joint is evaluated by testing standard 3BP specimens with crack tip located at different regions of a joint, including the base metal (BM), weld metal (WM) and heat-affected-zone (HAZ). Experiments were performed both at the room temperature and at design working temperature, 540°C. Based on these results, temperature effect on crack resistance is established for all different regions in a welded joint.

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Key concepts: Welding, Joint (building), Materials science, Base metal, Microstructure, Fracture toughness, Composite material, Fracture (geology)