The effect of a welding root opening on weld properties: a review

This article provides a review of studies on the welding joint gap influence on its properties. It analyzes papers dedicated to the welding joints using various methods (arc, laser, and hybrid welding). The gap impact on the geometric parameters of the weld, mechanical properties and deformation are considered. Four groups of research are highlighted: the search of an optimal gap, the construction of quality weld formation regions, the derivation of analytical expressions for calculating the gap, and process numerical modeling. It is noted that the gap is a crucial factor determining the joint quality, but recently research of gap influence especially in GTAW is insufficient at now.
EDN: LSDFNR, https://elibrary/lsdfnr

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