Influence Of Flux Cored Pulsed Arc Welding Process In Solidification Cracking Susceptibility Of Austenitic Stainless Steel [influencia Do Processo De Soldagem Com Arame Tubular Pulsado Na Suscetibilidade A Trincas De Solidificação Em Aços Inoxidáveis Austeníticos]

This study presents an experimental evaluation of the influence of both pulsed and conventional welding currents on the formation of solidification cracks when using flux-core arc welding. The AISI 316L austenitic steel was employed as the base metal in the experiments. The welding was carried out by the FCAW process using CO2 as shielding gas and AWS E316L T-1 as a tubular wire. Pulsed and conventional welding currents were applied with three different levels: 150, 200, 250A. The Transvarestraint Test with three different tangential strain levels (1,3 and 5 %) was used for the evaluation of the solidification cracks. The results showed that the Total Crack Length (TCL) was consistently the highest when the conventional welding current was applied. Weld beads obtained with greater currents presented more of δ Ferrite formation and incurred in lesser Total Cracking Sizes. Was also observed that the Total Crack Size was independent of the current type and the current level when the higher tangential strain levels were used.11197101Konosu, S., (2001) Engineering Failure Analysis, 8, pp. 75-85Folkhard, E., (1988) Welding Metallurgy of Stainless Steels, , Springer-Verlag Wien New YorkSuutala, N., Takalo, T., Moisio, T., (1979) Metallurgical Transactions A, 10 (A), pp. 1183-1190. , AugustSuutala, N., Takalo, T., Moisio, T., (1980) Metallurgical Transactions A, 11 (A), pp. 717-725. , MayLourencato, L.A., Braga, E.M., Trevisan, R.E., (2001) 1° Congresso Brasileiro de Engenharia de Fabricação (COBEF), , Abril, Curitiba, Parana, BrasilOlson, D.L., (1985) Welding Journal, 64, pp. 281s-295s. , OctoberMohandas, T., Madhsudhan, R.G., (1997) Journal of Materials Processing Tecnology, 69, pp. 222-226Lothongkum, G., Viyanit, E., Bhandhubanyong, (2001) Journal of Materials Processing Technology, 110, pp. 233-23