Hits:

Indexed by:会议论文

Date of Publication:2018-01-01

Included Journals:CPCI-S

Volume:424

Issue:1

Key Words:Al-Si alloys; Intermediate frequency electromagnetic field; Solidification Microstructure; mechanical properties

Abstract:The intermediate frequency electromagnetic (IFEM) field was applied to treat Al-1% Si (high-purity) and Al-8% Si alloys during direct chill (DC) casting process. The ingot was studied by means of metallographic examination and mechanical tests. The results showed that compared to the conventional casting, both Al-1% Si and Al-8% Si alloys processed under IFEM field exhibited superior refinement as well as an enhancement in the mechanical properties, especially the elongation. Si element segregation of high purity Al-1% Si alloy had effectively improved under IFEM field. Numerical simulation was used to better understand the role of IFEM field, that showed the inducing forced convection and the subsequent achievement of a uniform temperature field of IFEM field during the solidification could be accounted for the experimental observations.