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In order to study the effect of plastic deformation on microstructure and mechanical properties of as-cast AZ80 magnesium alloy, the experiment of direct extrusion was done to homogenized billets. The microstructure and mechanical properties of original samples and deformed samples were investigated. Experimental results show that homogenization can increase the mechanical properties of as-cast AZ80...
Microstructure and properties of the Al-7Si-0.5Mg-xLi (x=1, 2, 3) alloys were investigated. The microstructure was observed by optical microscopy, DSC was determined by a differential scanning calorimetry, and the hardness was determined by Vicker's tester. The results show that the primary Si phases are present in the alloys. The amount and size of primary Si phase increase with the increment of...
The magnesium alloys has been intensively studied for their suitable mechanical properties, excellent biocompatibility and their ability to biodegrade in biological environments. Although magnesium biodegradable implants possess many desirable properties, it is important that the alloy is able to be tolerated by the body- the constitutional elements of magnesium-based alloys should be toxic free....
Phase formation and diffusion are important topics of the material science of the alloys. By phase diagrams, it is meant that any diagram showing which phases are present in a system. In this study, the phases formed in Al-Mg system were thermodynamically calculated and experimentally investigated. A computer software tool and databases were used for the phase calculations. A brief review of thermodynamics...
The microstructure and corrosion behavior of semisolid AZ91D magnesium alloys was investigated. The Semisolid microstructures are consisting of primary solid particles and continuous liquid phase around the solid. The Solid particles have the lesser in solute component, and liquid phase with the higher in solute component that is consisting of β-Mg17Al12 and re-solidification αMg. It has been demonstrated...
The semi-solid magnesium alloy slurry was prepared by a newly self-developed mechanical stirring machine for preparing continuous semi-solid slurry, the effects of rare earth elements yttrium on the ignition point, the casting microstructure, the semi-solid microstructure and mechanical properties of AZ61 magnesium alloy were studied in this paper. The experimental results showed that increasing the...
In the present work, Sn-Ag-Cu-Mg (SACM) and Sn-Ag-Cu-Mg-La (SACML) lead-free solders based on near eutectic Sn-Ag-Cu (SAC) alloys were designed and fabricated. Experiments were conducted to investigate the effect of alloying on the microstructure and physical properties in aspects of melting, wetting performance by means of optical microscopy (OM), scanning electron microscopy (SEM), energy dispersive...
Sn-Ag-Cu-Mg lead-free solders based on a eutectic Sn-Ag-Cu alloy were prepared by means of orthogonal experimental design. The melting temperature and the wettability of Sn-Ag-Cu-Mg solders were tested by differential thermal analysis (DTA) method and SAT solder checker respectively. Combined with the microstructure analysis, the influence of trace addition of Mg on the melting points and wettability...
Ni-Mo based "Hastelloy" alloys are structural materials for the accelerator-driven molten-salt reactor, in which they are subjected to intense radiation damage. This causes a complete alteration of the microstructure. Since atomic collisions are responsible for inducing, modifying and activating the kinetic processes which alter the microstructure, high energy electron or proton irradiation...
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