Microstructure and second-phase particles in low- and high-pressure die-cast magnesium alloy AM50

Abstract

samples were produced at CANMET-MTL, and the casting parameters were as follows: 725°C casting temperature, 350°C to 400°C mold temperature, 2-to 3-second filling time, and 0.125 MPa filling pressure. The cooling rate for the LPDC samples was about 0.8°C/s. The HPDC samples were cast at the Gibbs Die Casting Corporation (Henderson, KY), and the casting parameters were as follows: 7.6 m/s injection speed, 690°C metal temperature, and 230°C mold temperature. The cooling rate of the HPDC sample was estimated to be at least two orders of magnitude faster than that of the LPDC sample.Metallographic samples were examined first with an optical microscope and then in a PHILIPS* XL30 scanning *PHILIPS is a trademark of

Role of second phase particles in pitting corrosion of 3003 Al alloy in NaCl solution

“…The second phases enriching in Cu, Si and Fe have been paid much attention due to their negative effects on corrosion resistance of Al alloy substrate [12,13,19,20]. Frequently, element Mn is added into Al alloys in order to decrease the concentration of intermetallics enriching in Fe, and simultaneously, to form Al x (Fe,Mn) [13,14,[21][22][23][24]. In the present work, EDXA results in Fig.…”

Development of creep-resistant magnesium casting alloys for high temperature automotive applications

“…Another important finding is that the Al-rich eutectic α-Mg phase disappears in the PM AC52 alloy, which is usually present in die cast Mg-Al-Mn alloys [11][12][13][14]. Also, the difference in the SDAS between the edge and the center of the castings is significantly reduced through the addition of Ca.…”

Directional Solidification of Mg-Al Alloys and Microsegregation Study of Mg Alloys AZ31 and AM50: Part II. Comparison between AZ31 and AM50

“…The AM50 is a general casting alloy providing good strength and ductility. [2] For both applications, extrusion and casting, the primary solidification and apparent microstructure are crucial for subsequent processing and final product quality, even though the microstructure formation and evolution during solidification are still not fully understood, as recently stated by Gertsman et al [3] for AM50 and similar die-cast alloys. They reported on the microstructure and second-phase particles in low-and highpressure die-cast AM50 alloy.…”

“…They reported on the microstructure and second-phase particles in low-and highpressure die-cast AM50 alloy. [3] Related work concerns the much more common magnesium alloy AZ91. Pettersen et al [4,5] studied dendrite stem orientation relations of directionally solidified AZ91.…”