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Showing 1 to 20 of 35 for “"Magnesium alloys"”.
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Fluidity of magnesium alloys
Thesis (M.S.)--Massachusetts Institute of Technology. Dept. of Metallurgy, 1956.
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Hot workability of magnesium alloys
… with decreasing strength. In working of Mg alloys from 150 to 450C̕, the flow curves harden to a peak and work soften to a steady state regime above 300C̕. At temperatures below 300C̕, twinning is observed initially to bring grains into more suitable slip orientations. At high T a …
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Solidification behaviour of magnesium alloys
Magnesium alloys have been extensively used for structural and functional applications due to their low densities. In order to improve the mechanical properties, grain refinement of the microstructures of magnesium alloys has been studied for many years. However, an effective and efficient grain …
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Core excitons in amorphous magnesium alloys
… obtained in the range 40200 eV for Mg-Group V alloys. Sharp line structure was discovered for amorphous alloys of Mg-Bi and Mg-Sb near the photoabsorption threshold of the Mg 2p core level. These lines were strongest for compositions corresponding to the formation of intermetal1ic compounds in …
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Cerium-based conversion coatings on magnesium alloys
… coatings (CeCCs) on AZ31B and AZ91D Mg alloys. Deposition of homogenous and protective CeCCs was highly dependent on the surface preparation steps. The best results were obtained when Mg samples underwent grinding, acid cleaning, and alkaline cleaning processes. This reduced the number …
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Design of Lightweight Magnesium Alloys: Processing, Microstructure and Properties
Magnesium is the lightest structural metal. It is 78% lighter than steel and 35% lighter than aluminum. Its high strength to weight ratio makes it an excellent material for applications in automotive, aerospace, and structural applications. It also possesses an elastic modulus and density …
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Dissimilar Metal Friction Stir Welding of Aluminum to Magnesium Alloys
<p>The joining of aluminum (Al) to magnesium (Mg) by friction stir welding resulted in the intermetallic formation inside the stir zone under all conditions of welding. The presence of brittle and low toughness intermetallic phases results in low strength and ductility of the weld joint. The …
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Interstitial-impurity interactions in copper-silver and aluminum-magnesium alloys
"Our purpose has been to determine the configurations and dynamical properties of complexes formed between interstltials and oversized impurities in electron-irradiated aluminum and copper. Measurements were taken of the ultrasonic attenuation (at 10 and 30 MHz) and resonant frequency (at 10 MHz) …
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Finite element analysis of self-pierce riveting in magnesium alloys sheets
… have been demonstrated to not be effective for magnesium alloys. Therefore, self-pierce riveting (SPR) has been presented as an attractive joining technique for these lightweight metals. However, SPR must be performed at elevated temperatures because of the low ductility of magnesium alloys at …
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The use of silicone resins as corrosion protective coatings for magnesium alloys
The future of magnesium sems to be as a structural material due to its light weight and ether excellent physical properties. In the chemical industry the use of the metal as a structural material is limited by its rapid corrosion, particularly in the presence of acids and salts. The recently …
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Finite element assisted prediction of ductile fracture in sheet bulging of magnesium alloys
… lighter vehicles that are more fuel efficient. Magnesium alloys provide that solution as they have a high strength to weight ratio and can contribute to reducing the overall weight of the vehicle. Over the past few years many researchers have tried shaping these alloys using various forming …
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Effects of adding small amounts of lithium to commercial sand casting magnesium alloys, The
Includes bibliographical references.
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Oxidation of Aluminium-Magnesium alloys at elevated temperature in the solid, semi-liquid and liquid states
… to monitor the oxidation rates of A1-1 to 9% Mg alloys in 0.21 oxygen/0.79 helium mixtures with and without 0.03 atm water vapour pressure, in the temperature range 500-725°C which include their respective solid, semi-liquid and liquid states. These measurements were supported by structural and …
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Localized Corrosion of Friction Stir Welded Magnesium AZ Alloys
Magnesium alloys, being the lightest engineering alloys, have the potential to replace ferrous and aluminum alloys in structural applications in the transportation sector. Thus far, their use has been limited largely due to challenges associated with their inherently poor corrosion resistance …
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The influences of holmium on the solidification, microstructure and mechanical properties of elektron 21 magnesium alloy
The solidification parameter of Elektron 21 magnesium alloys with various Ho concentrations were investigated using computer-aided cooling curve thermal analysis system, and the solidification microstructure and phase constitution of the investigated alloys were characterized by SEM, EDX, and XRD. …
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Improving mechanical properties of a magnesium alloy by severe plastic deformation
Magnesium alloys are very promising materials for automotive and aerospace applications due to their low density. The market of medical implants (e.g. temporary orthopaedic and cardiovascular implants) is another field of possible applications of magnesium alloys since they can completely dissolve …
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Microstructure and Mechanical Properties of WE43 Alloy Produced Via Additive Friction Stir Technology
… industries have increasing investigated magnesium alloys because of their high strength-to-weight ratio. Further efforts to save on material use and machining time have focused on the use of additive manufacturing. However, anisotropic properties can be caused by both the HCP structure of …
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A method of testing stress-corrosion cracking in magnesium alloy FS-1 extruded bar
… preventing a more widespread acceptance of magnesium alloys in the chemical industry is its susceptibility to various forms of corrosion. Stress-corrosion cracking, occurring under conditions of residual fabrication stresses or high external stresses, is a severe localized corrosion type …
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HEAT TRANSFER IN SQUEEZE CASTING OF LIGHT ALLOYS
… engineering materials such as aluminum or magnesium alloys. To maintain the same performance as reducing the weight of the vehicles, high strength material has to be used. This study was aimed to develop a solution for casting high strength wrought aluminum alloys and magnesium alloys. Some …
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