ABSTRACT. Functional graded magnesium matrix composites (FGMMCs) are widely employed for biomedical, aerospace and thermal barrier applications because of their better mechanical properties, biocompatibility bioactivity. In this study, AZ91D-wt. %Ti (x = 0, 4, 8, 12 16) fabricated by ex-situ centrifugal casting method. The NaCl based solution is sprayed on all 72 hours at the 1 kg/cm3 pressure ...

Stress Corrosion Cracking (SCC) of magnesium alloys is commonly observed in corrosve environments such as NaCl solutions. In this paper, the effect aluminum content on SCC alloy ingots, AM60B and AZ91D, evaluated using Slow Strain Rate Testing (SSRT) two environments: (1) air (2) 5%NaCl solution controlled from pH10 to pH11 with Mg (OH）2. The result shows that less susceptible than AZ91D. AZ91D...

AZ91D magnesium composites reinforced by Ti3SiC2 MAX phase were fabricated the stir casting technique. Tensile tests reveal that effects of and Ti2AlC on Mg matrix are different. Unlike Ti2AlC-AZ91D composite for which delamination happens during fracture, Ti3SiC2-AZ91D fractures interfacial debonding mechanisms. Transmission electron microscopy characterization shows few nanometric grains form...

A method is presented to use a dimensionless form of the well-known Niyama criterion to directly predict the amount of shrinkage porosity that forms during solidification of metal alloy castings. The main advancement offered by this method is that it avoids the need to know the threshold Niyama value below which shrinkage porosity forms; such threshold values are generally unknown and alloy dep...

Magnesium alloys are attracting great interest from the automotive industry because of the potential for weight reduction. An AZ91D cast alloy was studied in the current work to understand the effect of heat treatment on the microstructure and dynamic compressive properties. The selected heat treatments include solution treatment (T4) and solution treatment followed by aging (T6). The as-cast a...

The effects of Grp (graphite particles) addition and holding time on the microstructure mechanical properties Grp/AZ91D composite were investigated in this work. results indicated that distribution matrix was determined by self-stabilizing mechanism relationships between solidifying interface particles. Due to mechanism, a small amount would uniformly distribute melt alloy, as increased, agglom...

AZ91D and 8.5vol.% SiCp/AZ91D magnesium matrix composites were fabricated by a semi-solid extruded processing method, treated with solution aging heat treatment. The effects of SiCp on the microstructures alloy during recrystallization studied observing analyzing microstructure evolution extrusions treatments. results show that addition inhibits dynamic extrusion only 26% volume fraction recrys...

Considerable research has been carried out to study the laser welding of magnesium alloys. However, studies are mainly devoted butt welding, and there limited information in published literature concerning bead-on-plate AZ91D, even though is required for repair cast AZ91D parts with surface defects. In present investigation, cracking weld metal was observed when an alloy welded using method. Th...