[ Duplex Bar ] to ASTM 2298-13a . The impact specimen was Charpy-V notch , 10x10 mm , according to ASTM A370-13 and ASTM E23-12 . Impact testing for each location and orientation was performed on a set of three specimens . The disc was taken transverse to the bar length and divided into four quarters . Hence , the hardness tests were made at room temperature by using Rockwell C-Scale Tester according to ASTM A370 and
[ Duplex Bar ] to ASTM 2298-13a . The impact specimen was Charpy-V notch , 10x10 mm , according to ASTM A370-13 and ASTM E23-12 . Impact testing for each location and orientation was performed on a set of three specimens . The disc was taken transverse to the bar length and divided into four quarters . Hence , the hardness tests were made at room temperature by using Rockwell C-Scale Tester according to ASTM A370 and
method per ASTM E18 at each quarter with 5 mm intervals for every position { 0 °, 120 °, 240 °, and 360 °}.
Results and discussions Microstructure - The results of the etched transverse and longitudinal microstructure for the half radius of a final diameter and correlative forged bar exhibited in Figure 1 and Figure 2 . Figures 1 and 2 show the austenite phase in bright and the ferrite phase in darker contrast . In the transverse direction , the shape of austenite in the forged bar is somewhat more elongated and serrated grain than in the rolled bar . Moreover , there is a large quantity of secondary austenite phases in the forged bar . The anisotropic microstructure of the rolled versus forged bar in the transverse section is somewhat high ,
Ø140 Ø160 Ø180
Figure 1 . Microstructures at transverse direction . On the upper : As-rolled , on the lower : As-forged . 400x magnifications before reproduction .
Ø140 Ø160 Ø180
Figure 2 . Microstructures at longitudinal direction . On the upper : As-rolled , on the lower : As-forged . 400x magnifications before reproduction .
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