The present work was undertaken to improve superplastic ductility of friction-stir welded joints ultrafine-grained (UFG) Al–Mg–Sc–Zr alloy. In order suppress the undesirable abnormal grain growth, which typically occurs in heavily deformed base material, UFG material produced at elevated temperature. It suggested that new processing route could reduce dislocation density structure and thus enha...

Aluminum was a type of hard and soft material, because its high toughness, it easy to generate grinding heat, so polishing relatively difficult polish fire. has been used as processing material due excellent properties such lightness, corrosion resistance, non-magnetism, alloy strength, electrical conductivity, weight, heat dissipation. However, some problems arose when aluminum tubes. Thereby,...

Niobium-alumina composite aggregates with 60 vol% metal content and particle sizes up to 3150 μm are produced using castable technology followed by sintering, a crushing sieving process. X-Ray diffraction (XRD) analysis reveals phase separation during as the niobium:corundum volume ratios is between 37:57 64:31 among 4 aggregate classes 0–45, 45–500, 500–1000, 1000–3150 μm. The synthesized used...

ground settlement due to the shallow tunneling in urban areas can have considerable implications for aboveground civilinfrastructures. engineering geological characteristics of the tunnel host ground including geotechnical parameters of surrounding soil,groundwater situation, and in situ stress condition are amongst the most important factors affecting settlement. in this research, groundsettle...

austenitic stainless steels are extensively used in various applications requiring good corrosion resistance and formability. in the current study, the formation of nano/ ultrafine grained austenitic microstructure in a microalloyed aisi 304l stainless steel was investigated by the advanced thermomechanical process of reversion of strain-induced martensite. for this purpose, samples were subjec...

Dynamics can provide deep insights into the functional mechanisms of proteins and protein complexes. For large protein complexes such as GroEL/GroES with more than 8,000 residues, obtaining a fine-grained all-atom description of its normal mode motions can be computationally prohibitive and is often unnecessary. For this reason, coarse-grained models have been used successfully. However, most e...

We introduce a method to bring nearly atomistic resolution to coarse-grained models, and we apply the method to proteins. Using a small number of coarse-grained sites (about one per eight atoms) but assigning an independent three-dimensional orientation to each site, we preferentially integrate out stiff degrees of freedom (bond lengths and angles, as well as dihedral angles in rings) that are ...

We have derived an equation of motion for coarse-grained particles by using a projection operator. Because the derived coarse-grained equation is based on microscopic description, it can be the basis for models of various coarse-grained simulations. We show that by substitution of random forces into fluctuating forces in the coarse-grained equation, the equations for Brownian dynamics and dissi...

The possibility of increasing the static and dynamic strength aluminum-magnesium alloy AMg4.5 is shown by using methods severe plastic deformation, a combination annealing additional deformation ultrafine grained alloy. properties material are evaluated structural-temporal approach to analysis experimental data on tension small samples obtained split-Hopkinson pressure bar. Keywords: strength, ...

We participated in SemEval-1 English coarse-grained all-words task (task 7), English fine-grained all-words task (task 17, subtask 3) and English coarse-grained lexical sample task (task 17, subtask 1). The same method with different labeled data is used for the tasks; SemCor is the labeled corpus used to train our system for the allwords tasks while the labeled corpus that is provided is used ...