A dense inner layer is highly valued among the surface coatings created through plasma electrolytic oxidation (PEO) treatment, because the PEO coating has been troubled by inherent porosity since its conception. To produce the favored structure, a proven technique is to prompt a soft sparking transition, which involves a sudden decrease in light and acoustic emissions, and a drop in anodic volt...

Molten salts are widely used to extract oxides and particulate phases from molten Al and protect Al from oxidization during molten aluminum alloys processing. It was reported that TiCN showed a reasonable stability in molten aluminum during solidification nanoprocessing of aluminum matrix nanocomposites. To further verify the TiCN stability in molten aluminum in molten salt, EDX and TEM were us...

A modified strain-induced melting activation (SIMA) process is shown to improve high-temperature formability. The microstructural characteristics of the spheroidized grains of SIMA-processed alloys affect high-temperature formability. The effects of hot extrusion parameters and chemical composition on the evolution of spheroidized grains were investigated using several 6xxx series aluminum allo...

Fe-Al intermetallic alloys with aluminum content over 60 at% are in the area of the phase equilibrium diagram that is considerably less investigated in comparison to the high-symmetry Fe₃Al and FeAl phases. Ambiguous crystallographic information and incoherent data referring to the phase equilibrium diagrams placed in a high-aluminum range have caused confusions and misinformation. Nowadays une...

Low frequency internal friction measurements have been made on "pure" aluminum and dilute aluminum alloys in heavily cold-worked states. A relaxation peak is observed at about 200 K(for 1Hz) even in specimens of nominally 4N or higher purity. This peak is considered to be the same as those previously reported by several researchers for dilute aluminum alloys of Cu, Mg or Ga. Among various eleme...

Development of an accurate neuronal material model for aluminum alloys would facilitate better process control and parameter optimization in the aircraft industry. This research primarily attempts to design a connectionist constitutive model for aluminum 7075 alloy using multi-layer perceptrons. The backpropagation algorithm is used to train the designed network whose performance is then valida...

Cold-spraying of 1100 Al powder particles onto 1100 Al substrate was accomplished using carrier gases 100 vol.% He and a mixture of He–20 vol.% N2. TEM characterization correlates very well the occurrence of dislocations, presence of oxide, and surface instability phenomenon with observed mechanical and corrosion properties of the cold-sprayed coating. 2005 Acta Materialia Inc. Published by Els...

Purpose.Influence of preheating temperature and sodium silicate solute content in sand-sodium-silicate mixtures structured by SMS-process on their destruction work under knock loading action has been established. Methodology. Quartz sand brand 1K2O202, water, with specific gravity 1.42…1.44 g/cm3 modulus 2.8… 3.0 have used this work. Mixtures structuring realized microwave furnace frequency 2.4...

Transformation of Al(NO3)3∙9H2O (upon heating in the range of 20-1200 °C) into blends of amorphous and crystalline boehmite (210-525 °C), amorphous alumina and crystalline γ-Al2O3 (850 °C), and crystalline α-Al2O3 (1100 °C) was analyzed using X-ray diffraction (XRD), high-resolution transmission electron microscope (HRTEM), infrared (IR) spectroscopy, thermogravimetry, and low-temperature nitro...