《Table 9 Phase distributions》

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《Performance analysis of the SAW joint of duplex stainless steel clad plate》

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Next，several characteristic areas of the alloy layer w eld seam w ere tested to determine the distribution of the main anti-corrosive elements such as Ni，Cr，and Mo.Fig.6 schematizes the point locations of the energy spectrum analysis of Ni，Cr，and Mo.The test areas included the junction of the base and alloy layer w elds（A），the middle position of the alloy layer w eld（B），and the outermost area of the alloy layer w eld（C）.The field of view of each area w as magnified 40 times.Ten points w ere taken from each field at equal intervals from bottom to top，and the chemical composition of these points w as determined via scanning electron microscopy.For an accurate analysis，the acquisition time of each point w as set to 30 s，w hich ensured a total count of more than 250 000 for every point.The test results are show n in Table 8.Because the SAW melting pool w as relatively uniform，no major changes w ere observed in the distributions of Cr，Ni，and M o in the A，B，and C areas.This also confirms that the w elded joint has good corrosion resistance.