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FL cracks serve as crack initiation sites, significantly reducing the fatigue life of components subjected to fluctuating loads.

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In nickel-based alloys like Inconel 718, Niobium (Nb) segregates into the inter-dendritic region, forming brittle laves phases. These phases act as initiation sites for cracks. FL cracks serve as crack initiation sites, significantly

Studies show that increasing the welding metal reinforcement width (e.g., ensuring it is wider than 8mm) can effectively reduce stress concentration in the FL region. fl crack