analytical and experimental results the magnetization state of
the test object estimated with the test shim was investigated.
Furthermore, the measurement mechanism was also clarified.
Eveetizing yoke because of the open magnetic circuit between
the magnetizing yoke and the test object. The condition of an
openn if non-ferromagnetic materials are used for the test
object, magnetic particle indication on a type A standard test
piece is generated when a large current is applied to the
magn magnetic circuit between the magnetizing yoke and the test
object is not the same as our experimental condition and the
condition of actual MT operation. Moreover, MT cannot be applied
to non-ferromagnetic materials. Therefore, the condition using
non-ferromagnetic materials as a test object is beyond the scope
of this work.