摩擦攪拌によるA6061/S45C 突合せ接合における接合界面形成機構

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  • Formation Mechanism of Weld Interface by Friction Stir Butt Welding between A6061 and S45C
  • マサツ カクハン ニ ヨル A6061/S45C ツキアワセ セツゴウ ニ オケル セツゴウ カイメン ケイセイ キコウ

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<p>Friction stir butt welding between A6061 and S45C was achieved by plunging the tool into aluminum with slightly grinding the steel surface. The formation mechanism of weld interface was investigated by using straight and screw probes. Both of the probes created newly formed surface on the weld interface of steel surface and did not formed thick reaction layer not less than 1 mm on it. Also, the microstructure of aluminum along the weld interface within 3 mm from the weld surface was the similar in both probes. However, the surface morphology on weld interface of steel was di−erent in each probe. The surface morphology on weld interface for steel by screw probe exhibited a few wide linear scratched grooves along the welding direction, and aluminum was firmly adhered to the inside of these grooves. Thus, the screw probe increased the welding area and the weld strength by fabricating of the grooves. The groove formation is attributed to the built-up edge of steel on the screw probe and material flow around the probe.</p>

収録刊行物

  • 軽金属溶接

    軽金属溶接 58 (10), 12-21, 2020-10-16

    一般社団法人 軽金属溶接協会

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