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This fact would be mainly related to the geometrical distribution of the weld beads with respect to the geometrical distribution of the weld beads with respect to the location of Charpy-V specimen notch and to the increase in columnar zone proportion against the reheated zone area when the heat input is reduced as found by Evans (Ref.23). In samples C2V and C3V, a different behavior was detected; the proportion of columnar zones was lager in samples welded with higher arc energy, two
Passes per layer. This was probably due to the difficulties found during midcrostructural assessment give the little morphological differences between different zones in these samples. This fact is compounded with the intrinsic characteristics of uphill welds , which result in lower current, arc voltage, and welding speed (increased weaving )for the same heat input, which gives rise to a different bead shape than in the flat postion.