2546 超音波測定によるスポット溶接のナゲット部とコロナボンド部の判別(S26 溶接・接合,S26 溶接・接合の動向とその展開)

概要

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This study deals with the nondestructive discrimination between nugget and corona bond in the spot welds using a newly developed ultrasonic measurement with line focused probe. Three types of spot welded specimens; as weld specimens, spot welded specimens without surface indentation and one sheet specimens were prepared. The measurement of one sheet specimen showed that the reflected wave from the back wall in the nugget indicated higher or lower amplitude than that one in the base metal, which depended on the water path in the measurement. It was also shown that the comparison of amplitudes obtained from the scanning under two different water paths enables the nondestructive discrimination of nugget from the corona bond.
2007-09-07