| Prüfung von Nicht-Eisen-Metall-Druckgusskomponenten - Detektion und Bewertung oberflächenaher Porosität mit Hochfrequenzultraschall (2008) | |||||||||||
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| In automotive engineering die-casting components from non-ferrous metals are increasingly used as safety parts, which to a 100% have to be tested non-destructively. Additionally, for cost-efficient optimization of manufacturing processes, e.g. before machining, non-destructive testing of the components is required. Die-casting components contain process-related shrinking-cavities and pores, which, depending on their position within the component as well as their form and internal roughness, influence the strength of the component when loaded either statically or dynamically. Furthermore, they may influence the pressure tightness detrimentally. We have developed a high-frequency acoustical imaging system to detect porosity and single pores in the surface-near range (0.5 to 2 mm depth) in die-casting components. The scanning system employing a robot allows one to inspect components with curved surfaces. | |||||||||||
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