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When metal structures are manufactured, the heat cycle introduced by the applied welding technology can cause structural changes in the base material, as well as residual stresses, which under certain circumstances can lead to changes in the shape of the structure. This paper analyses certain possibilities to avoid and reduce the stress level and the distortions in the welded structure by applying various welding technological methods. The paper presents the results obtained after the fillet welds were made using ...

The welding characteristics of the welded joints are directly influenced by the thermal conditions applied during welding. At the same time, the welding type process influences the geometry of the welded seam, the nature and the extent of the structural transformations, the tensions and deformations level, as well as the values of the mechanical characteristics of the welded bead (yield strength, hardness, toughness etc.) The paper presents the experimental procedure, the results and the conclusions on the influen...

The paper presents and analyzes the experimental results obtained by the welding reconditioning of a pressure vessel made of 14CrMoV4, a Romanian trade of steel, which is the equivalent of 13CrMo4-5, in the European norm 10028-2/2009, steel, which functioned for a long period of time in the energetic industry. The welding process used for reconditioning is robotized gas metal arc welding (GMAW). A series of samples were realized using different technological parameters in order to obtain different geometrical conf...

The occurrence of nonconformities in prosthetics or medical instruments as a result of the manufacturing process or final machining (finishing) may lead to the decision of not using them in the medical process. The present paper aims to analyze the welding reconditioning possibilities in order to ensure the necessary geometrical characteristics, using the method of finite element analysis (FEA), of the interlocking intramedullary nail prosthetics made of titanium or titanium alloys. After identifying the nonconfor...