Monitoring of Precipitation Hardening in an Hsla Steel through Emat Measurements of Magnetostriction*
نویسندگان
چکیده
This work demonstrates a novel application of ultrasound: measurement of magnetostriction, the change of length of a ferromagnetic material that accompanies a change in magnetization. The technique involves measuring ultrasonic waves generated by an electromagnetic acoustic transducer (EMAT), and it offers an alternative method of measuring magnetostriction in cases where it would not be feasible to use strain gages (for example, on fragile, thin films).
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