Magsimal-59, an AlMgMnSi-type squeeze-casting alloy designed for temper F

Conference · Tue Oct 01 04:00:00 EDT 1996

OSTI ID:372056

Hielscher, U; Sternau, H; Koch, H; Franke, A J ^[1]

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1. Aluminium Rheinfelden (Germany)

To get high mechanical properties using standard squeeze casting alloys (for example A356) it is indispensable to make a heat treatment. That means solution heat treatment and quenching and artificially aging. For this reason, the authors were challenged to develop an alloy that provides sophisticated mechanical properties without any heat treatment. Compared to A 356 T6 values in brackets, the new alloy has yield strength > 21 ksi (> 32 ksi) tensile strengths > 42 ksi (43 ksi) and elongation > 15% (10%) in temper F. fatigue strength (r = {minus}1, high frequency pulsation test) is > {+-} 16 ksi (13.5). To meet these properties, a casting process with high solidification velocity like squeeze casting or high pressure die-casting is necessary. Magsimal-59 is of the AlMgMnSi-type. The microstructure consists of {alpha}-Al and a very fine dispersed ternary eutectic. The microstructure and the influence of cooling rate on the mechanical properties will be discussed including some examples of castings.

• OSTI ID: 372056
• Report Number(s): CONF-960202--; ISBN 0-87339-312-0
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM BASE ALLOYS
CASTING
CHEMICAL COMPOSITION
DENDRITES
ELONGATION
EUTECTICS
FATIGUE
IRON ADDITIONS
LIQUID METALS
MAGNESIUM ALLOYS
MANGANESE ADDITIONS
MECHANICAL PROPERTIES
MICROSTRUCTURE
S-N DIAGRAM
SILICON ALLOYS
SOLIDIFICATION
TENSILE PROPERTIES
TITANIUM ADDITIONS
ULTIMATE STRENGTH
YIELD STRENGTH