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Impact of Intensification Pressure and Grain Refiner on the Hot Tearing Susceptibility of a Semi-Solid Cast Al-Zn-Mg-Cu Alloy

Authors :
Qiang Zhu
Da Quan Li
Hai Yue Zhao
Stephen P. Midson
Min Luo
Source :
Solid State Phenomena. 285:283-289
Publication Year :
2019
Publisher :
Trans Tech Publications, Ltd., 2019.

Abstract

The commercial application of wrought aluminum alloys to semi-solid casting would be extremely beneficial, as wrought alloys often exhibit better strength-ductility combinations than cast aluminum alloys. Semi-solid casting typically reduces the hot tearing tendency, as it requires a globular microstructure and produces grain refinement, but hot tearing often still occurs during the semi-solid die casting of complex-shaped components produced from wrought alloys. This study examined the impact of intensification pressure and grain refinement on the hot tearing tendency of an Al-Zn-Mg-Cu alloy. Semi-solid slurries were produced using the SEED (Swirled Equilibrium Enthalpy Device) process. A specially designed constrained rod mold was used to evaluate hot tearing. Results showed the tendency for hot tearing decreased with increasing of intensification pressure. Grain refinement (with 0.06Ti) was also found to be beneficial to the elimination of hot tearing.

Details

ISSN :
16629779
Volume :
285
Database :
OpenAIRE
Journal :
Solid State Phenomena
Accession number :
edsair.doi...........90348a6f3b1e447274ca3423310ebe17
Full Text :
https://doi.org/10.4028/www.scientific.net/ssp.285.283