On the Notch-Sensitivity of Bead-Welded Heat Affected Zone by the Slow Bend Test

Abstract

The notch-sensitivity of the heat affected zone produced by heat input 51, 428 Joule/in. and 38, 571 Joule/in. weld bead were studied both on the rimmed and killed steel, using the Bead-Weld Slow Bend specimens (See Fig. 2, 3). In addition to these tests, the effect of specimen width (between 10 mm to 30 mm) on the notch toughness were studied.
The experimental results are as follows;
(1) As generally well known, the notch toughness of the killed steel are better than rimmed steel both on the base metal and the heat affected zone.
(2) The heat affected zone produced by heat input 51, 428 Joule/in. bead-weld has better notch toughness than the heat affected zone produced by heat input 38, 571 Joule/in. bead weld.
(3) The heat affected zone produced by heat input 51, 428 Joule/in. shows nearly the same notch toughness as the base metal both on the killed and rimmed steel.
(4) For the specimen width, 20 mm width specimen and 30 mm width specimen have nearly the same notch toughness but 10 mm width specimen did not show the remarkable transition tendency in our experimental temperature range.