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Y. Shi et al.
Fig. 10.49 MADGB of TC4 titanium alloy welded joint. a, b BM, c, d HAZ, e, f WM [45]
5. A unique frequency band 2–4 kHz is found, which can represent different
welding states including partial penetration and full penetration.
6. The physical significance of frequency features of arc length is put forward
by analyzing welding circuit and arc voltage signal. The variation of the arc
voltage signal shows the weld pool oscillation. A signal processing algorithm
is proposed to extract the oscillation frequency.
Y. Shi et al.
Fig. 10.49 MADGB of TC4 titanium alloy welded joint. a, b BM, c, d HAZ, e, f WM [45]
5. A unique frequency band 2–4 kHz is found, which can represent different
welding states including partial penetration and full penetration.
6. The physical significance of frequency features of arc length is put forward
by analyzing welding circuit and arc voltage signal. The variation of the arc
voltage signal shows the weld pool oscillation. A signal processing algorithm
is proposed to extract the oscillation frequency.