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Showing 1 to 20 of 27 for “"Mg alloys"”.
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Strength and ductility of Mg alloys from first-principles
Magnesium alloys are of great interest in the transportation sector for vehicle weight reduction and improved energy efficiency due to their high specific strength. However, Mg has limited ductility at room temperature due to a high strength anisotropy (~100:1). Thus, forming is performed at ~300°C …
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Structure and properties of three powder metallurgically processed Al-Cu-Mg alloys
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1980.
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Effects of oxide film, Fe-rich phase, porosity and their interactions on tensile properties of cast Al-Si-Mg alloys
Since mechanical properties of cast Al-Si-Mg alloys are directly influenced by microstructural defects, understanding the characteristics of these defects and any interactions between them is important for improving the properties of castings. This research studied the effect of the most common …
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Burn time measurements of micron sized Al-Mg alloys and Mg in a heterogeneous shock tube in different oxidizing environments
… Majority of the work performed in the past on Mg and Mg-Al alloys has been performed with coarse particles (>50 μm), which tend to have burn times in the 1-100 milliseconds. Work on single aluminum particles below 10 microns has shown a transitional regime. This marks the shift from diffusion …
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High-Throughput Profilometric Screening of Corrosion Inhibitors and Molecular Structure Effects on Magnesium Alloy Protection
… the rapid screening of corrosion inhibitors for Mg and its alloys by combining high-throughput experimentation with profilometric analysis. Using aromatic carboxylates and 2,6-pyridinedicarboxylate (2,6-PDC) as representative examples, the study explores how functional groups influence the …
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Cerium-based conversion coatings on magnesium alloys
… conversion 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 …
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Combustion dynamics of metal powders in mixed gas flows
… take into account different metals, including alloys, that burn in various oxidizing environments and various flow conditions. Validity of the present descriptions for such environments has not been established. This experimental study is aimed to measure burn times for aluminum, magnesium, and …
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Strength modelling of Al-Cu-Mg Type alloys
Age hardening of Al-Cu-Mg type alloys occurs in two stages separated by a constant hardness plateau when the alloys are aged at 110°C to 240?C after solution treatment and quenching. This work aims to develop a physically based two-stage hardening model to predict the yield strength of Al-Cu-Mg …
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Rapid solidification of zinc based alloys
… areas : the development of zinc based brazing alloys for the joining of copper produced by the rapid solidification technique; the study of the development of microstructures in rapidly solidified dilute zinc alloys. A new model has been proposed, based on the present experimental results and …
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Energetics Calculation of {10-12} Twin Nucleation and Growth in Magnesium and Alloys using Density Functional Theory and Atomistic Simulation
… affects the mechanical properties of magnesium (Mg) and its alloys, as well as other alloys with hexagonal close-packed (HCP) structures. The influence of solute atoms such as aluminum (Al), zinc (Zn), and yttrium (Y) on {"10" "1" ̅"2" } twin nucleation and growth in magnesium alloys remains …
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The effect of stabilization heat treatment on AA5182 aluminium alloy
… of the alloy during processing and forming. Al-Mg alloys, like AA5182, can undergo a low temperature heat treatment, which has the effect of stabilizing the microstructure and minimizing the subsequent recovery processes during and after coil coating. The effects of these heat treatments have …
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The Influence of Alloying Additions on Diffusion and Strengthening of Magnesium
Magnesium alloys are being developed as advanced materials for structural applications where reduced weight is a primary motivator. Alloying can enhance the properties of magnesium without significantly affecting its density. Essential to alloy development, inclusive of processing parameters, is …
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Quenching and tempering effects on Rheo-cast F357 aluminium alloy during Nd: YAG laser welding
Al-Si-Mg casting alloys are being used in automotive applications, aerospace applications and other applications requiring heat-treatable permanent mould castings that combine good weldability with high strength and toughness (ASM). These casting alloys are also known for their excellent …
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Stress corrosion cracking behavior of friction stir processed ultrafine grained light metal alloys
… tool, on the corrosion behavior of Al-Mg, Al-Mg-Sc, Mg-Al-Zn and Mg-Y-RE alloys has been studied. An attempt has been made to establish correlation between processing parameters and the subsequent microstructural evolution especially matrix grain size on the corrosion and stress …
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Finite element assisted prediction of ductile fracture in sheet bulging of magnesium alloys
… 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 techniques. …
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Solidification cracking resistance of high strength aluminum alloys
… in the manufacture of high strength aluminum alloys uneven cooling rates at different parts of the ingot cause thermal stresses. Due to these thermal stresses, cracks are initiated at the startup stage which may propagate as the stress elevates. Hence the evaluation of fracture toughness …
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The influences of holmium on the solidification, microstructure and mechanical properties of elektron 21 magnesium alloy
… 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. The …
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Fundamentals of friction stir spot welding
… contributor to propel the use of light weight alloys in the transportation industry. In particular, the automotive industry sees benefit in using light weight alloys to increase fuel efficiency and enhance performance. In this context, light weight design by replacing steel with Al and/or Mg …
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Stress-induced Damage and Post-fire Response of Aluminum Alloys
Aluminum alloys have increasing applications in construction and transportation industries. Both 5xxx-series (Al-Mg) and 6xxx-series (Al-Mg) alloys are frequently used in marine construction because of their light weight, high strength, and corrosion resistance. One of the major concerns regarding …
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Biodegradable stents made of pure Mg and AZ91 alloy through SPS sintering
… materials such as stainless steel and titanium alloys. It has been shown that the traditional stents can cause restenosis or thrombosis. In recent years the proposal of biodegradable stents is attracting the interest of the industry and the research, since the stent is mechanically needed only …
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