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IR thermography characterization of residual stress in plastically deformed metallic components |
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| Authors: | S Paoloni M E Tata F Scudieri F Mercuri M Marinelli and U Zammit |
| Institution: | (1) Institute for Medical Research and Occupational Health, Environmental Hygiene Unit, Ksaverska c. 2, P.O. Box 291, Zagreb, Croatia;(2) Andrija Mohorovičić Geophysical Institute, Department of Geophysics, Faculty of Science, University of Zagreb, Horvatovac bb, Zagreb, Croatia;(3) Meteorological and Hydrological Service, Grič 3, Zagreb, Croatia |
| Abstract: | A remote and non-destructive method for the characterization of residual stress in metallic components is here proposed. Such a method is based on the application of infrared thermography for the evaluation of thermal diffusivity, which is expected to be dependent on the local dislocation density in the material lattice induced by plastic deformations. Preliminary experimental results obtained on a yielded ASTM 516 grade 65 steel specimen are presented and discussed on the basis of microhardness and optical metallographic investigations carried out on the same sample. |
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