Quantitative characterization of Mg17Al12 phase and grain size in HPDC AZ91 magnesium alloy

Microstructure and interface characterization of a cast Mg2B2O5 whisker reinforced AZ91D magnesium alloy composite

“…Obviously, the Mg 2 Si particles are not nucleated on the Mg 2 B 2 O 5 whisker surface since the interlayer between Mg 2 Si and Mg 2 B 2 O 5 whisker is observed. The microstructure of the as-cast AZ91D alloy has typically a primary a-phase matrix and a divorced eutectic consisting of large b-Mg 17 Al 12 particles and eutectic a-Mg along the a-Mg phase grain boundaries [24]. The eutectic a-Mg phase is supersaturated with Al and can transform, by discontinuous precipitation of the b-Mg 17 Al 12 phase below the eutectic temperature, to form a fine lamellar b-Mg 17 Al 12 [25].…”

Effect of long term annealing on the microstructure and tensile properties of hpdc AZ91 Mg alloy

“…The values of clustering tendency below 1 indicate clustering, equal to 1; random, equal to 2.15; uniform distributions. The details of montage creation and the quantification procedure of microporosity and ␤ phase are presented elsewhere [11,12,13]. In addition, in situ tensile analysis coupled with SEM was performed to understand the microscopic failure mode of the material.…”

Micro–macro interactions and effect of section thickness of hpdc AZ91 Mg alloy

“…The microstructural area of 1.86 mm 2 was grabbed at 1000× for the quantification of ␤ phase by image processing. The details of montage creation and the quantification procedure of microporosity and ␤ phase are presented elsewhere [13,14]. In addition, in situ tensile analysis coupled with SEM was performed to understand the microscopic failure mode of the material.…”

“…Besides, pores are lowly present in the fine-grained rim regions of the castings compared to the coarse grained middle regions. High-density finer ␤ particles are arranged in the rim region compared to the middle of the castings [14].…”