The trend of hardness value of each process are different. The workpiece welding process by GTAW. The most HAZ strength and decrease continued until the Fusion zone specimens to believe, by the process EBW hardness is at a maximum area. Fusion zone and decrease continued until the last Base metal workpiece welding process by GMAW hardness was similar. The hardness of the weld metal a maximum high, followed by the HAZ and finally Base metal.But at the Fusion boundary of weld strength, and lower the Fusion zone HAZ Base metal abnormally.
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