Measurement of electromagnetic radiation in the single point incremental forming of AA3003-O

Abstract The strength and rigidity of the metals depends upon its crystal structures and intermolecular arrangement which resist its failure during loading. During the plastic deformation it is observed that an electromagnetic radiation (EMR) is emitted when there is a edge dislocation. This EMR may be used as a formability indicator in single point incremental forming SPIF where a thin sheet of different material is being deformed. The present paper summarises the experimental investigation for measuring the emission of EMR in the single point incremental forming (SPIF) of AA3003-O. A continuous signal is observed during the SPIF of a thin sheet of AA3003-O under unrestricted quasi-dynamic loading. The signal is captured through a digital oscilloscope (DSO). A maximum EMR of 64e-4 mV is noted at 2.1mm depth. The electric dipole is the main cause of EMR and it is directly proportional to the step depth. Maximum EMR is observed before crack propagation.