|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Defects and Properties of Cast Metals
||Determining Eutectic Grain Size and Casting Defects in an Al-12Si-0.8Cu-0.5Fe-0.9Mg-0.7Ni-0.2Zn Alloy
||Jiehua Li, Bernd Oberdorfer, Daniel Habe, Peter Schumacher
|On-Site Speaker (Planned)
In this contribution, an Al-12Si-0.8Cu-0.5Fe-0.9Mg-0.7Ni-0.2Zn alloy was investigated. In order to determine eutectic grain sizes, Modified Murakami reagent was used to etch out the eutectic grain boundaries. Furthermore, electron probe microanalyzer (EPMA) was also used to elucidate the distribution of Mg, Fe, Cu, Ni elements, which segregate to eutectic grain boundaries and thereby can be used to determine the eutectic grain size. In order to determine the number, size and distribution of casting defects (pores and inclusions), computed tomography (CT) was used. It was found that casting defects are mostly distributed along the eutectic grain boundaries, strongly indicating the refinement of eutectic grain is of great necessity to optimize the distribution of casting defects and decrease the size of casting defects. This investigation highlights the effect of the refinement of eutectic grain on casting defects and can be further related to the properties, in particular to dynamic fatigue properties.
||Planned: Supplemental Proceedings volume