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Abstract

In the paper, the mechanical properties of structural stainless steels referred to in EN 1993-1-4 used in the design of building structures and civil engineering works, are described. Some information about stainless steel behaviour at elevated temperatures is also given.

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... Część 1-8: Projektowanie węzłów [9]. Rys Specyficzne fizykomechaniczne właściwości stali nierdzewnych, które szerzej zostały opisane w pracach [24,25], wpływają na bezpieczeństwo konstrukcji budowlanych i powinny zastać uwzględnione przy formułowaniu i sprawdzaniu warunków stanów granicznych. Autorzy aktualnej normy do projektowania konstrukcji ze stali nierdzewnej [7] zdecydowali się oprzeć algorytmy wymiarowania tego typu konstrukcji na powszechnie znanych algorytmach dotyczących stali węglowej. ...
... Właściwości fizyczne, mechaniczne i technologiczne stali nierdzewnych, ich zachowanie w podwyŜszonych lub niskich temperaturach mają znaczący wpływ na zakres ich stosowania. W ogólnym przypadku w porównaniu z popularnymi gatunkami stali węglowej (S235 i S355) konstrukcyjne stale nierdzewne charakteryzują się większą wytrzymałością i ciągliwością, niŜszą przewodnością cieplną oraz przede wszystkim większą odpornością na korozję [24,25]. Niewątpliwą wadą stali nierdzewnej w porównaniu ze stalą węglową jest niestabilna i wysoka cena materiału (około 4 razy wyŜsza od stali węglowej, porównując np. ...
... The fatigue strength of the components/structural elements of the rim depends on various external and internal factors. Such factors were described in [83]. The external ones comprised shape and size, surface finish, and service conditions. ...
Article
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Serious damage to the inner rim of the rear twin wheel in one dump truck was noted during the operation of the fleet performing transport tasks. It was a drive wheel, and its damage occurred while driving with a load exceeding the permissible value. The examination of selected fragments of the damaged rim surface was conducted visually as well as using a digital microscope with a portable head. The measurements of the Vickers hardness and microscopic observations of the material structure of the sample cut along the thickness of the rim disk were carried out. The drive torque loading of the twin wheels of the tipper-truck rear axle, under their mating with different kinds of road roughness and under various vertical loads of the wheels was calculated. An analysis of stress distributions in the rim modelled using the Finite Element Method was also conducted for several possible scenarios of wheel loading. The damage to the rim was caused by simultaneous action of several factors, such as overloading the car, poor condition of the tires, loading the drive wheel by a part of the vehicle weight and the driving torque, and hitting a wheel on a cavity in a dirt road, causing a temporary relief of one of the tires on a twin wheel.
... Al mismo tiempo, la estructura resultante en la HAZ es mucho más compleja que la estructura inicial del acero ya que exhibe una composición morfológica de las fases que es el resultado de distintos mecanismos de formación que tienen lugar en diferentes momentos duran te el enfriamiento. Estos cambios en la estructura modifican considerablemente las propiedades mecánicas y corrosivas de los DSSs, lo que se interpreta como una pérdida de las propiedades del material base a causa del uso de la soldadura [6], [15]- [18]. ...
... High-quality carbon and low-alloyed steels are widely used to manufacture thin-walled metal products like tubes, vessels, beams, shells, panels, folds, membrane structures and other forms used in metalworking. However, application of these cheap steels has been limited due to inadequate mechanical strength, stiffness and low resistance to corrosion [1]. Reducing the weight of steel structures and the amount of metal required by improving the strength, hardness and stiffness of steel is a major task in the metalworking sector. ...
Article
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This paper is devoted to investigating numerically, by finite element analysis (FEA), and analytically the influences and effects of laser processing of the surface of thin-plate, low-carbon structural steel. The plate mechanical properties—axial and flexural stiffnesses, force-deflection behavior and cross-section force-strain behavior—are investigated after different laser treatments. An analytical methodology of the estimation of the cross-section area of the laser-processed metal is also proposed in the present article, that can be applied to choosing the reasonable distance between the centers of the laser-processed tracks. The methodology takes into account the width of the laser-processed tracks and the distances between these tracks. The experimental, finite element numerical and analytical analyses showed that the laser treatments of the surface of the steel plate increase the yield point of the laser-processed metal and the axial and flexural stiffnesses of the plate.
... However, carbon steels and low alloy steels widely used for these purposes have significant drawbacks. Structural carbon steel is fairly heavy, not very durable, and not resistant to corrosion [5]. Improvement of the mechanical properties (strength and hardness) of steel is a key factor to reduce the quantities of metal required by structures and to reduce the weight of metal parts. ...
Article
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This paper presents the results of computer simulations and experimental studies, aiming to increase the mechanical strength of sheet metal parts manufactured from high-quality structural carbon steel by means of local laser processing. The effects of laser processing on the strength of steel sheet plates and their ability to resist bend load after laser treatment were studied. The results of bending experiments and computer simulations of elastoplastic deformation establish that local laser processing with surface melting can be used to increase the mechanical strength of structural elements made from thin sheet steel C22E and to decrease its deflection under similar workload, as an alternative to the application of complex geometric shapes, additional strengthening elements, or heat treatment.
... Stainless steels are passive alloys, which due to their chemical composition tend to form a thin oxide layer that inhibits the metal dissolution in corrosive environments [1]. Physical, mechanical, and anticorrosive properties of the alloy are highly related to its microstructure, where one or two phases (i.e., austenitic, ferritic, or both) may be formed [2]. Due to their unique properties, including adaptation to changes in solution salinity and pH level, these alloys are widely used in application areas such as construction and building [3], heat exchangers [4], and biomedicine [5]. ...
Article
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This study demonstrates an electron beam physical vapour deposition approach as an alternative stainless steel thin films fabrication method with controlled layer thickness and uniform particles distribution capability. The films were fabricated at a range of starting electron beam power percentages of 3–10%, and thickness of 50–150 nm. Surface topography and wettability analysis of the samples were investigated to observe the changes in surface microstructure and the contact angle behaviour of 20C to 60C deionised waters, of pH 4, pH 7, and pH 9, with the as-prepared surfaces. The results indicated that films fabricated at low controlled deposition rates provided uniform particles distribution and had the closest elemental percentages to stainless steel 316L and that increasing the deposition thickness caused the surface roughness to reduce by 38%. Surface wettability behaviour, in general, showed that the surface hydrophobic nature tends to weaken with the increase in temperature of the three examined fluids.
... The creep limit to tensile strength ratio is considered to be a creep-resistance characteristic of steels [17,18]. Figure 5 shows the temperature function of this ratio for the tested steels and the selected creep-resistant steels. ...
Article
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The paper deals with the testing of microalloyed steels H300LAD and H380LAD under creep conditions. To test the properties of these steels, tensile and creep tests were carried out in the temperature range of 200–500°C. Torn samples were subjected to microscopic and submicroscopic observations. Microalloyed steels were compared with the alloyed steels C16E and 16Mo3 bypasses used at the same temperatures. The results of the experiments highlighted the possibility of application of microalloyed steels in operations within the specified temperature range.
Conference Paper
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In this work, the study of absorption and fluorescence spectra for compound (Anthracene mixture by 2-Methylnaphthalene) which dissolved in a polar solvent had been done. The diluted concentrations were used to minimiz the phenomenon of self-absorption. The calculated values of the energy transfer (k) and the quenching factor (Q) were estimated. The values of the quenching factor (Q) increase with the increasing of mixing ratio for the concentrations [10-3 M] and [10-4 M] for compound. The increasing of value of the quenching factor (Q) with the increasing mixing ratio of the concentration of [10-3M] and less than [10-4M] because of value of the quenching factor caused by the concentration and traps and this affects by the ratio (IG/IH). The other cause for this difference is the strong self – absorption of the 2- Methylnaphthalene crystal. This leads to a non-interference electronic cloud for each molecule which is the basis to charge transition and as a consequence the transition low of energy between molecules.
Podstawowe wiadomości o stalach odpornych na korozję
  • E Kaliszewski
  • S Czyżowicz
Kaliszewski E., Czyżowicz S., Podstawowe wiadomości o stalach odpornych na korozję, (online) homepage, http://www.n-s.pl/betolit/betolit/porady/stal.pdf (date of access: 2014-01-30).
Stainless steel and their properties, (online) homepage: www.hazmetal.com, (date of access: 2014-01-30)
  • B Leffler
Leffler B., Stainless steel and their properties, (online) homepage: www.hazmetal.com, (date of access: 2014-01-30).
Stainless steel for design engineers
  • M F Mcguire
McGuire M.F., Stainless steel for design engineers, ASM International, Ohio, 1 st Edition, 2008.
The European Stainless Steel Development Association Euro Inox and The Steel Construction Institute, Design manual for structural stainless steel
The European Stainless Steel Development Association Euro Inox and The Steel Construction Institute, Design manual for structural stainless steel -Commentary (Second Edition), 2003.