Quantitative Acoustic Emission Source Characterization of Microcrackings in Steel
Source abstract
Abstract
Abstract Acoustic emission (AE) source wave analysis is a new NDE technique for the investigation of dynamic fracture process. We applied this technique to the quantitative characterization of crack sources in ductile fracture. Using two samples of ASTM A533B steel with different sulfur content, acoustic emissions during fracture toughness tests were detected, located, and analyzed. The detected AE signals were classified into two types according to the analyzed source waveforms. One was a signal due to microcracking at the MnS inclusion, and the other was a signal due to coalescence of the voids. The results of the source wave analysis showed that microcracking at the inclusions was due to Mode I type tension crack with sizes of 10–30 μm, and the coalescence of the voids was due to tension shear mixed cracks with sizes of 60–100 μm. It was confirmed that this technique is very effective for the quantitative evaluation of microcrackings and for the detection of the nucleation and growth of cracks.
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Research context
OpenAlex topics: Ultrasonics and Acoustic Wave Propagation · Fatigue and fracture mechanics · Hydrogen embrittlement and corrosion behaviors in metals
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References (16)
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