Zubert B.,Fahrzeugindustrie mbH |
Honl F.,Fahrzeugindustrie mbH |
Guhmann C.,Fahrzeugindustrie mbH |
Rethmeier M.,Fahrzeugindustrie mbH
Materialpruefung/Materials Testing | Year: 2014
So far, thermographic non-destructive testing of spot welds usually excludes emissivity. The following report analyzes the expected correlation between the emissivity and the diameter of the spot weld. Sixty samples in three standard material combinations with different spot weld qualities were measured. The emissivity was determined using the basic equation of thermography and the spot weld diameter was measured by destructive testing. The evaluation of the results shows a correlation between these two values and the correlation increases with declining emissivity of the basic material. In conclusion, the usability of the results in case of thermographic measurements of spot welds is presented. © Carl Hanser Verlag GmbH & Co. KG.