Effect of Degassing and Grain Refinement on Hot Tearing Tendency in Al8Si3Cu Alloy

Document Type

Article

Publication Date

7-1-2018

Abstract

The effect of melt quality on hot tearing susceptibility of Al8Si3Cu alloy was examined under six different conditions, by using a traditional T-shaped mold. Grain refinement was carried out by two different modifiers: AlTi5B1 and Al3B. For each test, samples were cast before and after degassing of melt. Therefore, a new hot tearing tendency index was developed by both bifilm calculations and porosity that occurred in the middle of T-zone of casting parts. Results indicated that hot tearing of cast aluminum alloys was a complex phenomenon, and bifilms play a major role, especially by compensating for shrinkage and consequently contributing to the inconsistencies in results.

Publication Title

International Journal of Metalcasting

Volume

12

Issue

3

First Page

589

Last Page

595

Digital Object Identifier (DOI)

10.1007/s40962-017-0197-9

ISSN

19395981

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