Determining Casting Defects in Thixomolding Mg Casting Part by Computed Tomography
A quantitative analysis on the casting defects is of great necessity to further improve the mechanical properties of high-performance alloys, in particular dynamic fatigue properties. Computed tomography (CT) is frequently utilized to determine the casting defects of casting parts and thereby evaluate their casting qualities. In this contribution, one Mg casting part (AZ91D, Mg–9Al–1Zn) produced by thixomolding was investigated by computed tomography. No significant casting defect was observed, strongly indicating that thixomolding could produce high-quality Mg casting parts. Furthermore, newly developed reconstruction software developed in Austria (VrVia GmbH) was used to obtain more details from the same casting part. This investigation demonstrates that computed tomography is an efficient method to determine casting defects in near-net-shape casting parts.
KeywordsMg alloy Thixomolding Computed tomography Casting defects
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