Evolution of stress and microstructure during gapped bead-on-plate testing of quenched and tempered steel
A recent research paper by Chen et al.1 on gapped bead-onplate (G-BOP) testing of flux cored arc welds metal deposited on a high strength quenched and tempered steel demonstrated that the shielding gas mixture can exert a major influence on transverse hydrogen assisted cold cracking (HACC) of the weld metal. This paper reports complementary data on the development of tensile restraint stress along the weld bead and the evolution of microstructure on cooling, as well as the time and temperature dependent onset of hydrogen assisted cold cracking.
Chen, L., Li, H. Jun., Alam, N., Davidson, L. & Dunne, D. P. (2015). Evolution of stress and microstructure during gapped bead-on-plate testing of quenched and tempered steel. Australasian Welding Journal, 60 (2), 37-48.