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Metal magnetic memory (MMM) testing technique is a novel testing method which can early test stress concentration status of ferromagnetic components. Under the different maximum tensile stress, the relationship between the leakage magnetic field of at certain point of cold rolled steel specimen and the tensile stress was measured during the process of loading and unloading by repeated. It shows that...
The alternating current stress measurement (ACSM) which is developed from alternating current field measurement(ACFM) is a new and effective electromagnetic non-destructive testing method with greatly application potential for stress measurement. Using this technology to detect the magnetic field disturbance on the specimen caused by the stress can realize the assessment for the degree of stress concentration...
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