Influence of other factors
The weldability of steels

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Influence of other factors


The weldability of steels

Author : Thibault FOURCADE

Publication date: September 10, 2025 | Lire en français

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4. Influence of other factors

4.1 Fatigue resistance

Unlike static stresses, where the strength of welded joints can be close to that of the base steel, dynamic or cyclic stresses (fatigue) significantly reduce the mechanical strength of welds. Fatigue fractures often occur suddenly, without any prior plastic deformation or elongation. They generally occur in the immediate vicinity of the welded joint, often at the interface between the molten metal and the base metal.

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4.1.1 Origin of fatigue fractures

The fatigue...

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