It is well known that ultrasonic melt treatment (UST) provides many benefits to casting processing, especially for the refinement or modification of as-cast structure. There is a lack for systematic studies on Al-Si alloys, although a number of reports are available on hypo-eutectic A356-type and hyper-eutectic (18-24 wt% Si) alloys, showing primary Al or Si refinement. In this paper, the effect of UST on the formation of microstructure was systematically analyzed in hypo-eutectic, near-eutectic and hyper-eutectic Al-Si alloys, including commercial piston alloys. The results show that UST usually results in the refinement of grains and primary Si particles when it is applied in a proper temperature range, while ultrasonic treatment during the whole solidification processing leads to coarsening effect on eutectic Si phase or primary Si particles.
CITATION STYLE
Zhang, L., Eskin, D. G., Miroux, A., & Katgerman, L. (2016). Formation of microstructure in Al-Si alloys under ultrasonic melt treatment. In Light Metals 2012 (pp. 999–1004). Springer International Publishing. https://doi.org/10.1007/978-3-319-48179-1_174
Mendeley helps you to discover research relevant for your work.