Inhibiting Brittle Intermetallic Layer in Magnesium/Aluminum Bimetallic Castings via In Situ Formation of Mg{sub 2}Si Phase

Journal Article · Thu Aug 15 04:00:00 EDT 2019 · Metallurgical and Materials Transactions. B, Process Metallurgy and Materials Processing Science

DOI:https://doi.org/10.1007/S11663-019-01577-1· OSTI ID:22933559

Chen, Yiqing; Zhang, Hui; Zhu, Ziang; Xu, Guangchen ^[1]; Liu, Lihua ^[1]

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1. Hefei University of Technology, School of Materials Science and Engineering (China)

A quasi-continuous Mg{sub 2}Si layer is formed in situ at the magnesium/aluminum interface of bimetallic castings, by selecting a Si-containing aluminum alloy and overcasting process control. This effectively inhibits the formation of brittle intermetallic compounds (Al{sub 3}Mg{sub 2}, Al{sub 12}Mg{sub 17}) during the casting process, and the mechanisms are discussed based on phase diagram calculations and experimental validation. It is, thus, recommended to select Si-containing Al alloys as substrate for Mg/Al bimetallic castings.

• OSTI ID: 22933559
• Journal Information: Metallurgical and Materials Transactions. B, Process Metallurgy and Materials Processing Science, Journal Name: Metallurgical and Materials Transactions. B, Process Metallurgy and Materials Processing Science Journal Issue: 4 Vol. 50; ISSN MTBSEO; ISSN 1073-5615
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM
ALUMINIUM ALLOYS
CASTING
INTERMETALLIC COMPOUNDS
LAYERS
MAGNESIUM
MAGNESIUM SILICIDES
PHASE DIAGRAMS
PROCESS CONTROL
SILICON ADDITIONS
VALIDATION