Ultrasonic testing for defects in weld of aluminum alloy sheet
ZHANG Hong1��DU Hua1��YANG Jing2
��1. Technology Center�� Shanghai Automotive Group Limited by Share Ltd.�� Shanghai 200041�� China 2. School of Materials Science and Engineering�� Shanghai University�� Shanghai 200072 �� China��
Abstract��The existing national standard stipulates that the thickness of the ultrasonic testing workpiece should be larger than 8 mm. For the workpiece thickness less than 8 mm�� ultrasonic testing has always been vacant. The ultrasonic testing for the welds of 5 mm aluminum alloy was carried out with a 5P8��8K3 inclined probe with a larger K value and shorter front. And the metallographic experiment of the detected defects in the weld joint was carried out�� which proved that ultrasonic testing was feasible for detecting defects in welds of aluminum alloy sheet with the thickness less than 8 mm. In addition�� the welding defects could be quantified by the special weld defect contrast test blocks.
2018, Vol. 36 
