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Abstract

The tensile (deformation and fracture) behaviour of a multipass submerged arc (SA) welded joint of Type 316 stainless steel is investigated by tests at room temperature and at 400 C on all weld metal and transverse to weld (composite) specimens, as well as by microstructural and compositional analyses (optical, scanning electron and transmission electron microscopy). The as-deposited metal is characterised by a systematic variation in the tensile properties across the thickness with the higher strength and the lower ductility in the weld centre. These variations are related to material variability (mainly in dislocation density) because of local dissimilarities in thermal and mechanical histories occuring during the welding process. However, the material variability in the fusion zone, although important, is not so large in the present weld and it does not influence the tensile properties of the weld as a whole. Moreover, the tensile behaviour concerning the transverse to weld specimens is characterised by a supporting effect, from the higher yield strength material zone (fusion zone) to the lower yield strength material zone (parent metal) justified by the different contribution of the parent metal and of the weld-deposit metal to the integral plastic strain of the specimens.

Additional information

Authors: PIATTI G, JRC Ispra (IT);VEDANI M, JRC Ispra (IT)
Bibliographic Reference: Paper presented: Reactor Safety Research, Varese (IT), Sept. 24 - Nov. 20, 1989
Availability: Available from (1) as Paper EN 35125 ORA
Record Number: 199010061 / Last updated on: 1994-12-01
Category: PUBLICATION
Original language: en
Available languages: en