Feature analysis and extraction of inner defects for spot weld nugget of aluminum alloy

摘要

The information and data reflecting inner defects in spot welding nugget of aluminum alloy were obtained by edge extracting and tracking to binary image. Based on the K-L transformation, the major and minor axes of defects were calculated, and the distribution of defects in spot welds were described. Based on the above mentioned, a preliminary analysis of defect features was carried out.