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Metallurgical and Materials Transactions A
Erschienen in: Metallurgical and Materials Transactions A 7/2009

01.07.2009

Microstructure Formation in AlSi4MgMn and AlMg5Si2Mn High-Pressure Die Castings

verfasst von: S. Otarawanna, C. M. Gourlay, H. I. Laukli, A. K. Dahle

Erschienen in: Metallurgical and Materials Transactions A | Ausgabe 7/2009

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Abstract

Understanding microstructure formation during high-pressure die casting (HPDC) is important for the effective quality control of high-pressure diecast aluminum-alloy components for high-integrity applications. In this study, two HPDC-specific aluminum alloys, AlSi4MgMn and AlMg5Si2Mn, were cast into tensile test bars by cold-chamber (CC) HPDC. The microstructures of the tensile bar specimens were characterized at different length scales, from the scale of the casting to the scale of the eutectic interlamellar spacing. The results show that the salient as-cast microstructural features, e.g., externally solidified crystals (ESCs), defect bands, the surface layer, grain size distribution, porosity, and hot tears were similar for both alloys. The formation of these features can be understood by considering the influence of flow and solidification during each stage of the HPDC process.
Vorheriger Artikel Synthesis and Characterization of Chromate Conversion Coatings on GALVALUME and Galvanized Steel Substrates
Nächster Artikel Microstructure and Solidification Sequence of the Interdendritic Region in a Third Generation Single-Crystal Nickel-Base Superalloy

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Metadaten
Titel
Microstructure Formation in AlSi4MgMn and AlMg5Si2Mn High-Pressure Die Castings
verfasst von
S. Otarawanna
C. M. Gourlay
H. I. Laukli
A. K. Dahle
Publikationsdatum
01.07.2009
Verlag
Springer US
Erschienen in
Metallurgical and Materials Transactions A / Ausgabe 7/2009
Print ISSN: 1073-5623
Elektronische ISSN: 1543-1940
DOI
https://doi.org/10.1007/s11661-009-9841-1

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