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- W807705208 abstract "When a time-varying magnetic field is applied to a ferromagnet a rearrangement of local lattice strain fields due to the motion of non-magnetic domain walls occurs and emits elastic energy. The interaction between domain walls and lattice defects creates a discontinuity in the domain wall motion causing a burst of energy called Magneto-Acoustic Emission (MAE). The envelope of the time-averaged MAE bursts has a unique shape which has been shown to be dependent upon the frequency and magnitude of the applied field and factors affecting lattice defects such as embrittlement. Although domain wall movement is a random process it does exhibit features of regularity which have been identified by studying phenomena such as 1/f flicker noise and self-organized criticality (the domino effect). In this paper, a probabilistic model of the MAE signal has been developed to gain a better understanding of the phenomenon. The model incorporates several simplifying assumptions yet yields good qualitative agreement with observed experimental results and also provides information on the possible underlying mechanisms responsible for MAE. This model will serve as a precursor for providing quantitative information on the embrittled state of low-carbon steels using MAE." @default.
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- W807705208 date "1993-08-01" @default.
- W807705208 modified "2023-09-23" @default.
- W807705208 title "A Probabilistic Model for Simulating Magneto-Acoustic Emission Responses in Ferromagnets" @default.
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