Effect of Sn addition on microstructure, mechanical and casting properties of AZ91 alloy

Effect of Intensive Cooling of Alloy AZ91 with a Chromium Addition on the Microstructure and Mechanical Properties of the Casting

“…Inside the furnace, a protective gas atmosphere was used, consisting of a mixture of Ar + SF 6 under the pressure of 0.15-0.20 MPa. The gas flow equaled: 10 cm 3 /min for SF 6 and 500 cm 3 /min for Ar. Due to the high tendency of the introduced alloy addition for gravitational segregation, the magnesium alloy with the additions was intensively mixed in the crucible.…”

“…In order to improve their mechanical properties, magnesium alloys are enriched with various alloy additions [2][3][4][5][6][7][8][9]16], including rare earth elements [10,11]. In the recent years, research has been conducted, which confirms that a small amount of chromium and/or vanadium improves the properties of magnesium alloys [12].…”

Mechanical characterization and corrosion behavior of newly designed Sn and Y added AZ91 alloy

“…The motive of this attempt is to suppress the formation of discontinuous precipitates and/or creating thermally stable intermetallic precipitates. Turen [9] investigated that, 0.5 wt.% Sn addition to AZ91 alloy, transformed the lamellar eutectic structure into fully divorced β eutectic, forming fine Mg 2 Sn phase that distributed throughout α-Mg matrix, which could block the movement of dislocation by Orowan looping. Li et al [10] also reported that Sn addition could suppress the formation of discontinuous precipitation at grain boundary in aged AZ91D alloy and there was no discontinuous precipitation up to 2.0 wt.% Sn addition.…”

“…Li et al [10] also reported that Sn addition could suppress the formation of discontinuous precipitation at grain boundary in aged AZ91D alloy and there was no discontinuous precipitation up to 2.0 wt.% Sn addition. Moreover, Sn is an inexpensive alloying element that can strengthen the AZ91 alloy by solid solution hardening and precipitation strengthening by the formation of new intermetallic Mg 2 Sn phase, besides it has a high hydrogen voltage that can improve the corrosion resistance [9,11]. Enhancement of the corrosion resistance with respect to the rise in high temperature tensile properties is a best option for increasing the application of AZ91 alloy.…”

Microstructure and mechanical properties of rheo-squeeze casting AZ91-Ca magnesium alloy prepared by gas bubbling process

“…The chemical route is easy to apply but it is not always possible to find or develop a potent nucleant for a given group of alloys. Numerous investigations have been carried out to refine the ascast microstructure of Mg-Al alloys by chemical route [8,9]. However, the results to date are still unsatisfactory.…”