Edge dislocations within the plastic zone ahead of a crack tip form accelerated electric line dipoles which give rise to the electromagnetic radiation (EMR) emissions in metal and alloys. This paper reports an experimental investigation to determine EMR radiation during incremental microforming of a thin aluminum sheet. The EMR signals emit from aluminum grade Al3003 during deformation under unrestricted quasi-static micro-deformation is reported. The EMR emission characteristics are influenced by the microstructural changes rather than forming parametric conditions. The EMR emissions are followed by micro-deformation locally in predetermined loci in continuous deformation pattern through a rotating tool with two different depths. The nature, amplitude and frequency of the observed EMR emissions are in conformity with the predictions of the theoretical model developed by the Misra and co-authors.2424 Chauhan VS, Misra A. Electromagnetic radiation during plastic deformation under unrestricted quasi-static compression in metals and alloys. International Journal of Materials Research. 2010;101(7):857-864.
25 Kumar R, Misra A. Effect of processing parameters on the electromagnetic radiation emission during plastic deformation and crack propagation in copper-zinc alloys. Journal of Zhejiang University-SCIENCE A.2006;7(11):1800-1809
26 Kumar R, Misra A. Some basic aspects of electromagnetic radiation emission during plastic deformation and crack propagation in Cu-Zn alloys. Materials Science and Engineering: A. 2007;454-455:203-210.
27 Srilakshmi B, Misra A. Secondary electromagnetic radiation during plastic deformation and crack propagation in uncoated and tin coated plain carbon steel. Journal of Materials Science. 2005; 40(23):6079-6086.
28 Chauhan VS, Misra A. Effect of strain rate and elevated temperature electromagnetic radiation emission during plastic deformation and crack propagation in ASTM B265 grade 2 titanium sheet. Journal of Materials Science. 2008; 43(16):5634-5443.-2929 Mishra SK, Sharma V, Misra A. Effect of rate of deformation on electromagnetic radiation during quasi-static compression of sintered aluminium performs. International Journal of Materials Research. 2014; 105(3):265-271.
Keywords:
SMIMF; EMR; Step Depth; Microstructure; Input Variables
