Análisis de fisuramiento en uniones soldadas con proceso SMAW sometidas a esfuerzos de tracción

Abstract

The purpose of this degree project is to analyze cracking on welded joints with SMAW process subjected to different tensile stresses. To generate these stresses and based on ASTM E8-04 standard, a device was designed and built to quantify the applied stress to manufactured specimens on ASTM A36 steel concerning to AWS B4.0 (2007) for longitudinal tensile test and welded with E6010 electrode according to the respective WPS. Appropriate test conditions and the considered parameters for the analysis, such as maximum applied load, the loading time and the time in which the load was applied, were set through previous tests; a complementary study was also carried out with axial tensile stresses, reducing the weld bead’s length around 88% and increasing the area by 45%, in order to verify the material resistance and analyze cracking appearance. With non-destructive testing, cracking presence or absence on the weld bead was verified; subsequently, a welded specimen without external stress applied, was tension tested in order to obtain the reference maximum tensile strength value of 68.4 Ksi which will be used for the corresponding analysis. Finally, the tested specimens’ maximum value of tensile strength is 25.16 Ksi, which corresponds to 36.78% of the reference value.