The correlation between microstructure and mechanical properties of high-pressure die-cast AM50 alloy

Modeling the tensile failure of cast magnesium alloys

“…Numerous researchers have presented both empirical and analytical approaches in attempts to characterize the dependence of local mechanical properties of both aluminum and magnesium die-cast alloys upon porosity [3,4,[7][8][9][10][11][12][13][14][15][16][17][18][19][20]. Several researchers present data which gives a strong correlation between the elongation of die-cast AM50 and AM60 with measured volumetric porosities [3,4,9].…”

“…Several researchers have investigated the variations of mechanical properties in cast magnesium alloys, and determined a strong relationship between porosity and the local mechanical properties [3,4,[7][8][9][10][11][12][13][14][15][16][17]. In previous publications [7,8], we have developed an analytical model to predict the tensile elongation of die-cast magnesium alloys from the strain-hardening coefficient of the alloy and the local area fraction and location of porosity.…”

Effect of Hydrostatic Pressure on the 3D Porosity Distribution and Mechanical Behavior of a High Pressure Die Cast Mg AZ91 Alloy

“…A large number of studies have tried to relate HPDC microstructures to their mechanical behavior. [10][11][12][13][14][15][16][17][18][19][20][21][22] In general, it is agreed that porosity is the microstructural feature that has the most deleterious effect on the mechanical properties. In particular, the presence of pores gives rise to fracture at smaller strains than in their wrought counterparts.…”

“…Furthermore, the current impossibility to reproduce three-dimensional (3D) pore distributions in different HPDC cycles leads to a large variability in the tensile ductility of different components, thus constituting a serious limiting factor for the wide commercialization of Mg HPDC parts. Fracture has been reported to initiate at the largest microvoids [19] and at porosity segregation zones. [17] It has been proposed that tensile ductility is not related to the bulk volume fraction of pores, but to the area fraction of the pores at the fracture surface.…”

The microstructure, mechanical properties and creep behavior of Mg–3Sm–0.5Zn–0.4Zr (wt.%) alloy produced by different casting technologies

“…Low-cost high-temperature magnesium alloys have evoked an interest in recent years because of their potential for automotive applications in the form of powertrain components where considerable weight reduction can be achieved [1][2][3][4]. Since the operative temperatures are close to 200 • C for these applications, magnesium alloys are required to have excellent tensile properties and high-temperature creep resistance [5,6].…”