|About this Abstract
||2019 TMS Annual Meeting & Exhibition
||Solidification Processing of Light Metals and Alloys: An MPMD Symposium in Honor of David StJohn
||Grain Refinement of Al-7Si through Addition of an Al-V-B Master Alloy
||Yunhu Zhang, C.Y. Ye, Y.P. Shen, W. Chang, D.P. Wang, D StJohn, G. Wang, Q.J. Zhai
|On-Site Speaker (Planned)
Al-Si casting alloys, as one of the most important Al alloys, have a wide range of application in the automotive, aerospace and other industries due to their excellent combination of castability, mechanical properties and corrosion resistance. The poisoning effect of silicon on the grain-refining ability of Al–Ti–B grain refiners in Al–Si casting alloys has been a major impediment to further improve their properties. Some grain refiners such as Al-B master alloy and Nb-B inoculation have been developed as an alternative solution to achieve good grain refinement in Al-Si alloys. In the present study, an Al-V-B master alloy has been developed in order to achieve the grain refinement of the primary á-Al in Al-Si alloys. Quantification of the degree of grain refinement achieved by Al-V-B added to Al-7wt%Si alloy and its fading behavior have been investigated and compared to the Al-B master alloy. The experimental results are promising indicating that the Al-V-B master alloy can be applied on an industrial scale for the grain refinement of Al-Si cast alloys.