the Vickers microhardness results of this welded joint with several passes

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the Vickers microhardness results of this welded joint with several passes.In relation to the base
metal,both the lower and upper parts of the welded joint demonstrated hardness values of between 137 and 186 VH,
compatible with A-36 steel.One also notes that the mean values of the upper and lower parts of the base metal are
similar,which was expected.In relation to TAZ, microhardness values between 140 and 186 VH were
observed,demonstrating that the thermal cycle of the welding did not produce any significant hardening in this
area.In relation to the weld metal,values between 138 and 184 VH were observed,compatible with the additional
metal produced with ER70S-6 wire used in MIG-MAG welding.Table 4 demonstrates that both TAZ and the
metal weld presented microhardness values in the upper part of the joint(weld finishing)slightly higher than in the
lower part of the joint(weld root).This fact is attributed to the effects of the thermal cycles which occur in the weld
root with the deposition of the subsequent passes.
 

Date: 2023-04-10     hits: 568    Return