Effect of trace Ce addition on the microstructures and mechanical properties of A356 (AL–7SI–0.35 Mg) aluminum alloys
- 28 June 2011
- journal article
- research article
- Published by Informa UK Limited in Journal of the Chinese Institute of Engineers
- Vol. 34 (5), 609-616
- https://doi.org/10.1080/02533839.2011.577598
Abstract
A356 hypoeutectic alloy is a heat-treatable Al–Si–Mg system with a normal composition of Al–7 wt.% Si and about 0.35 wt.% Mg which has seen widespread applications in the aerospace and automotive industries. The purpose of this study is to determine the influence of different amounts of Ce on the microstructures and mechanical properties of A356 alloys. The findings indicate that modification efficiency in microstructures and mechanical properties of A356 alloy are greatly enhanced by adding 1.0 wt.% Ce. Two kinds of intermetallic compounds are found in the study, including Ce–23Al–22Si and Al–17Ce–12Ti–2Si–2 Mg (in wt.%) phases. Moreover, though the ductility of the Ce modified alloys are both greatly improved, there is no positive effect on the ultimate tensile strength that can be attributed to the formation of an Al–17Ce–12Ti–2Si–2 Mg phase. Furthermore, the results of thermal analysis reveal that there is no direct relationship between eutectic growth temperature and silicon morphology/modification rating.Keywords
This publication has 10 references indexed in Scilit:
- Effect of trace La addition on the microstructures and mechanical properties of A356 (Al–7Si–0.35Mg) aluminum alloysJournal of Alloys and Compounds, 2009
- The effects of Mn additions on the microstructure and mechanical properties of Al–Si–Cu casting alloysMaterials Science and Engineering: A, 2008
- The effects of mischmetal, cooling rate and heat treatment on the hardness of A319.1, A356.2 and A413.1 Al–Si casting alloysMaterials Science and Engineering: A, 2008
- Effects and deformation characteristics of cross-channel extrusion process on pure Sn and Al–7Si–0.3Mg alloyMaterials Chemistry and Physics, 2008
- Eutectic modification and microstructure development in Al–Si AlloysMaterials Science and Engineering: A, 2005
- Eutectic Modification of Al-Si Alloys with Rare Earth MetalsMATERIALS TRANSACTIONS, 2004
- Evaluation of Silicon Twinning in Hypo-Eutectic Al-Si AlloysMATERIALS TRANSACTIONS, 2003
- On-line prediction of aluminum–silicon eutectic modification level using thermal analysisMaterials Characterization, 2001
- Cracking control in DC casting of high‐strength aluminum alloysJournal of the Chinese Institute of Engineers, 1999
- A study of the influence of mischmetal additions to ai-7si-0.3mg (lm 25/356) alloyMetallurgical and Materials Transactions A, 1996