TRANSIENT TEMPERATURE FIELDS EFFECTS ON MULTI-PASS WELDING IN A BUTT JOINT OF AUSTENITIC PIPING

Abstract

This work uses computational thermomechanical model-based finite element analysis (FEA) to explore the effects of welding sequences on residual stresses that accumulate in the material and distortions of welded components, which are a direct outcome of residual stresses, the material micro-structures, material properties, and eventually the fracture toughness. The consequences of the welding process are evaluated in this study in an austenitic pipe butt weld.

U ovom radu je korišćena računarska termomehanička analiza na bazi modela konačnim elementima (FEA) kako bi se istražili uticaji sekvenci zavarivanja na zaostale napone koji se pojavljuju u materijalu, i deformacije zavarenih delova, koje su direktna posledica zaostalih napona, mikrostrukture materijala, svojstva materijala, kao i žilavosti loma. Posledice postupka zavarivanja su utvrđene u ovom radu kod spoja austenitnih cevi.