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The making of structures using advanced materials and joining technologies is frequently accompanied by limited weldability problems. The obtainability of joints characterised by required properties can be limited, among other things, by susceptibility to crack formation. The article presents an overview of classification of cracks in welded and braze welded joints based on reasons for crack formation and the period of crack development. The primary division of fabrication/production-related cracks includes hot, cold, lamellar and annealing cracks. The study recommends the extension of the above-presented classification by including cracks occurring at a temperature higher than ambient temperature and lower than the lower limit of high-temperature brittleness range. The above-named temperature range could include cracks triggered by the loss of plasticity in the solid state resulting from the occurrence of ductility-dip brittleness and cracks related to liquid metal embrittlement.

A New Look at the Classification of Cracks in Welded and Braze Welded Joints