Non-destructive evaluation of local mechanical properties of Al die cast large components by means of FIMEC indentation test

Indentation tests were performed on a large automotive component (a van gearbox) by means of a FIMEC apparatus. No surface treatment or component machining was performed before testing and small indentation marks were left on the part skin. The test results provide a yield strength distribution in the part geometry, according to the die casting procedure. Higher yield strength values are measured close to the metal injection gates. XRD analyses were also performed on samples extracted from the gearbox. The comparison between XRD data and FIMEC ones shows that the FIMEC test is useful to recognise differences in bulk material properties even if the skin properties are identical.