The Effect of Mechanical Stress on Barkhausen Noises from Heat-treated Nickel Plates
نویسندگان
چکیده
The effect of mechanical stress on Barkhausen noise from pure nickel plates is reported for as-rolled plate and plates which are annealed at various temperatures up to 1000 K. The data are compared with Vickers hardness and SEM images. The Barkhausen noise energy detected has been found generally to decrease rapidly with nominal stress except a case of a plate annealed at around 400 K. The larger the annealing temperature, the larger the rate of decrease was observed. Overall features are explained qualitatively by a model in which tensile stress pull out the Barkhausen jumps from an observable condition and annealing makes the number of pinning sites small.
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