Steel Structure
Mostrando 25-36 de 262 artigos, teses e dissertações.
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25. Effect of Aging Heat Treatment H950 and H1000 on Mechanical and Pitting Corrosion Properties of UNS S46500 Stainless Steel
The effect of aging temperature on mechanical and pitting corrosion properties of UNS S46500 was investigated. Tensile and Hardness tests were carried out and the microstructure was analyzed by optical microscopy, scanning electron microscopy and X-ray diffraction; Thermo-Calc simulations helped in the phase identification. Pitting corrosion properties were
Mat. Res.. Publicado em: 08/11/2018
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26. Gluten-free cookies elaborated with buckwheat flour, millet flour and chia seeds
Abstract The aim of this study was to obtain an optimized gluten-free cookie formulation using alternative flours. For this, a 22 central composite rotatable design (CCRD), with varying concentrations of millet flour (MF) and chia seeds (CS), on a base of buckwheat flour (BF), was used. Control cookies were elaborated with 100% wheat flour (WF). The cookies
Food Sci. Technol. Publicado em: 22/10/2018
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27. Optimization of reinforced concrete polygonal sections under biaxial bending with axial force
Abstract Concrete is the world’s most utilized material for production of the structural elements employed in civil construction. Due to its low tensile strength and brittle nature it is reinforced with steel bars forming the reinforced concrete (RC structure). Linear elements of reinforced concrete are commonly employed in multi-story buildings, bridges,
Lat. Am. j. solids struct.. Publicado em: 04/10/2018
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28. Caracterización del comportamiento frente a la corrosión en soldaduras de recargue de aceros inoxidables superdúplex
ABSTRACT Superduplex stainless steels have a dual structure constituted approximately by 50% of ferrite and 50 % of austenite. This fact produces a good combination of mechanical properties and corrosion resistance. Thanks to these features their use is growing, mainly in the industries of paper, chemical, gas and oil. Surfacing welding is used for the manuf
Matéria (Rio J.). Publicado em: 19/07/2018
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29. Characterization of reverse martensitic transformation in cold-rolled austenitic 316 stainless steel
ABSTRACT In this work the reversion of the strain-induced ?’-martensite to ?’-austenite was studied in a series of AISI 316 stainless steels (SS) specimens. The samples were submitted to 63% reduction in thickness by rolling at a temperature of -70ºC, to achieve high martensite content. The reversion of martensite to austenite was made by means of isoch
Matéria (Rio J.). Publicado em: 19/07/2018
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30. Structural reliability analysis of steel plane frames with semi-rigid connections
Abstract The design codes for structural design traditionally establish the adoption of partial safety factors to deal with uncertainties. These standards do not allow one to know the real probabilities of failure of a structure. What is needed, from a practical and scientific point of view, is a more consistent approach, based on reliability theory. This ar
REM, Int. Eng. J.. Publicado em: 2018-07
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31. Performance of infill stiffened steel panel against blast loading
Abstract In blast loading, out-of-plane behavior of infill wall is activated initially. Contrary to other types of infill wall such as brick or concrete wall, infill steel plate wall exhibits more ductility. Since blast impulsive loading suddenly exerts a large amount of kinematic energy to infill wall, energy absorption characteristic of the infill wall sh
Lat. Am. j. solids struct.. Publicado em: 26/04/2018
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32. Thermal analysis of steel-concrete composite cross sections via CS-ASA/FA
Abstract When exposed to high temperatures, such as in a fire situation, the physical and resistance characteristics of the materials employed in the structure deteriorate as the temperature increases. This fact promotes a considerable loss in the bearing capacity and stiffness of the structural system. The verification of a structure exposed to fire depends
REM, Int. Eng. J.. Publicado em: 2018-04
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33. Theoretical Approach to Simulate Efficient Selective Solar Absorbers With Micro or Nano Structured Arrays
Study of the solar absorber with photonic crystal or micro structures as the heat absorbing surfaces operated at a high-temperature was conducted. Numerical calculations based on rigorous coupled-wave analysis were performed to determine the absorptance of the photonic crystal surface on the absorber. The effect of nano geometry of the photonic crystal in tu
Mat. Res.. Publicado em: 22/03/2018
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34. Microstructural Evolution of a Pearlitic Steel Subjected to Thermomechanical Processing
The microstructural alterations suffered during the process of drawing deformation and subsequent annealing of pearlitic steel wires, were evaluated by scanning electron microscopy and atomic force microscopy. The deformed material showed the curling structure in cross section while, in the longitudinal section, the lamellae was aligned with the drawing dire
Mat. Res.. Publicado em: 26/02/2018
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35. Flexural Wave Band Gaps in Phononic Crystal Euler-Bernoulli Beams Using Wave Finite Element and Plane Wave Expansion Methods
We investigate theoretically and experimentally the forced response of flexural waves propagating in a 1D phononic crystal (PC) Euler-Bernoulli beam, composed by steel and polyethylene, and its band structure. The finite element, spectral element, wave finite element, wave spectral element, conventional and improved plane wave expansion methods are applied.
Mat. Res.. Publicado em: 08/01/2018
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36. Influence of heat treatments on the microstructure and degree of sensitization of base metal and weld of AISI 430 stainless steel
ABSTRACT AISI 430 is a non-stabilized ferritic stainless steel grade with carbon content lower than 0.12%.After hot and cold rolling this material is annealed. The slow cooling after soaking at temperatures between 900oC and 1000oC promotes the formation of a high quantity of carbides and nitrides, while the rapid cooling partially suppresses the formation o
Matéria (Rio J.). Publicado em: 08/01/2018