Because of their excellent properties in the as-cast condition, Al-MgMnSi alloys like Magsimal-59TM are being used increasingly for automotive applications. The preferred casting processes are 1) high pressure diecasting with vacuum or forced venting systems or 2) squeeze-casting. Depending on casting application, a wide range of mechanical properties can be achieved. They include high elongation (>14%) with medium yield strength or medium elongation with high yield strength (>200 MPa). For high-elongation requirements, a low-cost heat treatment has been developed that eliminates both solution heat treatment and water quenching, thereby also avoiding part distortion. Additionally, the influence of magnesium content on yield strength is described. The paper also discusses results of scanning electron microscope (SEM) analysis and metallographic studies. Castings developed for automotive applications are shown.
Recent developments in Al-MgMnSi-type alloys for automotive applications
1998
9 Seiten, 4 Quellen
Aufsatz (Konferenz)
Englisch
Recent Developments in AL-MG-MN-SI-Type Alloys for Automotive Applications
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