Acoustic Emission of Fatigue-deformed Alumminum Alloys for Automotive Panels
نویسندگان
چکیده
Acoustic emission behavior during fatigue deformation and fracture was investigated in Al-Mg-Si alloys for automotive body panels. Generation of fatigue cracks was clearly identified by the burst of AE signals at the early stage of fatigue test. During the middle stage of fatigue, AE signals having low amplitude about 60dB corresponding to the propagation of striations appeared continuously. At the moment of fracture, AE with amplitude ranging from 50 to 80 dB was detected by the microscopic changes from striations to transgranular voids.
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