Effect of localisation of plastic deformation on the kinetics of failure of specimens of welded joints

• Published in: Welding international Vol. 14; no. 11; pp. 899 - 902
• Main Authors: Saraev, YU N, Makarova, L I, Kirilova, N V, Nikolaev, A S, Kozlov, A V, Khochenko, A
• Format: Journal Article
• Language: English
• Published: Taylor & Francis Group 01-01-2000
• ISSN: 0950-7116; 1754-2138
• DOI: 10.1080/09507110009549290

In this work, investigations were carried out into the distribution of local deformation epsilon sub n (n) along the tensile loading axis of heterogeneous specimens by the method of deposition of a reference grid. 300x100x8 mm exp 3 components were welded with a standard V-shaped welding gap made of 10G2S steel using pulsed arc CO sub 2 welding with Sv-08G2S wire, diameter 1.2 mm. The width of the gap was 2.5 mm. The welded joint was produced in three passes by welding from top to bottom. A one-sided root weld was produced with the formation of a reverse bead without a backing strip or root welding. The tensile specimens were cut under water in an electro-erosion machine. the microstructure of the material was examined using a MIM-8 optical microscope. To investigate the distribution of local strains in local welding, a reference gird with a cell size of 1x0.5 mm exp 2 was deposited on the polished surface of the specimen. The surface of the specimen was photographed in the initial condition and after tensile loading.