Abstract
The laser welding is easier to automate than the other welding method, so it is expected as the high quality and accuracy welding. The stainless steels were irradiated using YAG laser for examining the penetrating conditions during the laser irradiation. And the detected AE signals during laser irradiation were analyzed with "Weighted Mean Frequency Distribution Analysis Method" and "Wavelet Transform". In this paper, relevancy between the analysis results of the signals during laser irradiation and the penetrating condition of the specimen are reported.
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