|About this Abstract
||Materials Science & Technology 2019
||Late News Poster Session
||P2-95: Effect of Mass Deposition on Fatigue Properties of Newly Developed Ultra-narrow Gap Multipass PC-GMA Weld for Thick Section
||Ramkishor Anant, P.K. Ghosh
|On-Site Speaker (Planned)
The superiority of narrowest groove butt weld of thick section is especially to attain maximum reduction of residual stresses and high fracture toughness. However, the success of narrow groove multi-pass welding is primarily governed by required fusion and successful inter-pass cleaning of weld bead. A substantially narrow GMAW torch nozzle has been designed that enables narrowing down of weld groove up to a limit of just accommodating the nozzle in. By using of this newly developed GMA torch nozzle a narrowest possible groove dissimilar weld joint has been produced and the J-integral fracture toughness tests was carried out using the C(T) specimens of the conventional and ulta-narrow groove dissimilar weld joints at a given weld width of 28mm and 7.5mm respectively. It is noticed that initiation fracture toughness of narrow gap P-GMA welds significantly increases with respect to those observed in case of the conventional V-groove weld joint.