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Search results for: STEEL OFFICE BUILDING
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Oxidation kinetics and electrical properties of oxide scales formed under exposure to air and Ar–H2-H2O atmospheres on the Crofer 22 H ferritic steel for high-temperature applications such as interconnects in solid oxide cell stacks
PublicationA 100 h isothermal oxidation kinetics study for Crofer 22H was conducted in air and the Ar–H2-H2O gas mixture (p(H2)/p(H2O) = 94/6) in the range of 973–1123 K. The parabolic rate constant was independent of oxygen partial pressure in the range from 6.2 × 10−24 to 0.21 atm at 1023 and 1073 K, while at 973 and 1123 K it was higher in air than in Ar–H2-H2O. The scales consisted of Cr2O3 and manganese chromium spinel with an Mn:Cr...
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Determination of causes of accelerated local corrosion of austenitic steels in water supply systems
PublicationThis paper concerns an inspection of a water supply system, made of AISI 304 steel, which showed signs of local corrosion at the weld. Such corrosion caused material perforation after very short periods of operation. It was revealed that steel was sensitised during the welding process. It was also proven that chromium micro-segregation occurred in the alloy leading to galvanic cell formation which initialised the process of pitting...
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Analiza dynamiczna szkieletowego budynku stalowego od wpływów sejsmicznych i parasejsmicznych
PublicationCelem niniejszego artykułu jest przedstawienie wyników analizy dynamicznej szkieletowego budynku stalowego od wpływów sejsmicznych i parasejsmicznych. Siły wewnętrzne oraz naprężenia w elementach konstrukcji zostały określone dla trzęsienia ziemi El Centro, zarejestrowanego w San Fernando Valley 18 maja 1940 r. oraz dla wstrząsu górniczego, który miał miejsce w Polkowicach 20 lutego 2002 r. Wyniki analizy pokazują znaczący wzrost...
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Investigations on fracture in reinforced concrete beams in 3-point bending using continuous micro-CT scanning
PublicationThis study explores a fracture process in rectangular reinforced concrete (RC) beams subjected to quasi-static three-point bending. RC beams were short and long with included longitudinal reinforcement in the form of a steel or basalt bar. The ratio of the shear span to the effective depth was 1.5 and 0.75. The focus was on the load–deflection diagram and crack formation. Three-dimensional (3D) analyses of the size and distribution...
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Study on the applicability of the measurements of magnetoelastic properties for a nondestructive evaluation of thermally inducted microstructure changes in the P91 grade steel
PublicationThe paper presents the resuIts of the investigation of the influence of duration and temperature oftempering process on the magnetoacoustic properties of P91 tempered martensite ferritic steeI. Duringtempering of martensitic steels the dislocation density. which initially is very high. systematicallydecreases what is confirmed both by analysis of the width of X-ray diffraction peaks and hardnessmeasurements. Magnetic hysteresis...
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Multiparameter analysis of the Barkhausen noise signal and its application for the assessment of plastic deformation level in 13HMF grade steel
PublicationArtykuł przedstawia wyniki wieloparametrowej analizy właściwości sygnału szumu Barkhausena (BN). Poza powszechnie stosowanymi kwantyfikatorami sygnału szumu Barkhausena takimi jak amplituda, całka z obwiedni sygnału czy też wynikami analizy impulsowej sygnału proponujemy dodatkową analizę opartą na zmianach amplitudy prądu magnesującego. Jak się okazuje charakter zmian sygnału Barkhausena (w funkcji stopnia deformacji plastycznej)...
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Franssen J.-M., Real P.V.: Fire Design of Steel Structures. ECCS, Ernst&Sohn, Berlin 2010
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Numerical Simulation and Experimental Analysis of Thermal Cycles and Phase Transformation Behavior of Laser-Welded Advanced Multiphase Steel
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Problemy drgań trybun stalowych poddanych oddziaływaniom dynamicznym = Vibration problems of steel grandstands under dynamic loads
PublicationW niniejszym artykule przedstawione zostały wyniki badań eksperymentalnych i analiz numerycznych dotyczące zachowania się trybun stalowych poddanych oddziaływaniom dynamicznym. Z uwagi na coraz bardziej powszechne stosowanie tych konstrukcji jako wyposażenia np. stadionów sportowych oraz na ich obciążenie tłumem ludzi trybuny stalowe są konstrukcjami stale narażonymi na oddziaływania dynamiczne. Lekkie i smukłe elementy z jakich...
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The Influence of EP/AW Addition in the MQL Method on the Parameters of Surface Geometrical Structure in the Process of Turning 316L Steel
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Suitability of DIC and ESPI optical methods for monitoring fatigue damage development in X10CrMoVNb9-1 power engineering steel
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Corrosion studies using potentiodynamic and EIS electrochemical techniques of welded lean duplex stainless steel UNS S82441
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Structure and properties of the Ti+Ti(C,N) coatings obtained in the PVD process on sintered high speed steel
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The influence of plasma-sprayed coatings on surface properties and corrosion resistance of 316L stainless steel for possible implant application
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Corrosion Resistance and Mechanical Properties of TIG and A-TIG Welded Joints of Lean Duplex Stainless Steel S82441 / 1.4662
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Direct measurements and numerical predictions of welding-induced initial deformations in a full-scale steel stiffened plate structure
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Multi-criteria Optimization of the Abrasive Waterjet Cutting Process for the High-Strength and Wear-Resistant Steel Hardox®500
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Korozja naprężeniowa stali 14hnmbcu w środowisku wody morskiej.Stress corrosion cracking of 14hnmbcu steel in sea-water.
PublicationW pracy przedstawiono zagadnienia niszczenia środowiskowego stali o wysokiej wytrzymałości na konstrukcje morskie. Podatność stali 14HNMBCu i jej złącza spawanego na naprężeniowe pękanie korozyjne badano w oparciu o próbę powolnego rozciągania. Próby wykonano w środowisku powietrza oraz wody morskiej przy polaryzacji katodowej.
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TS-based RSM-aided design of cold-formed steel stiffened C-sectional columns susceptible to buckling
PublicationThe paper focuses on joint-performance analysis of a built-up cold-formed thin-walled C-sectional column with a fillister (stiffener) of the same type, interconnected with a series of bolts located along the length of the compressed members in specific spacing. The quantity of bolts and the non-connected starting distance of the fillister are considered random variables of the problem. Optimal distribution of joints on the stiffener...
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Seismic Response Analysis of Knee-Braced Steel Frames Using Ni-Ti Shape Memory Alloys (SMAs)
PublicationShape Memory Alloys (SMAs) are known as active materials that can be widely used for structural purposes due to their flag-shape behavior under loading and reloading. Their unique characteristics provided a potential solution for civil engi-neers especially to model buildings with the capability of dissipating seismic en-ergy. In this study, the main purpose is to explore the seismic behavior of Knee-Braced Frames (KBFs) and...
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WHAT KIND OF CITY ARE WE BUILDING? WHAT KIND OF CITY DO WE WANT TO BUILD? Re-viewing three different urban developments in metropolitan areas
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The role of non-profit open access journals in building the country's scientific potential: Reflections on ten years of the International Journal of Pedagogy, Innovation and New Technologies experience
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Reference-free determination of debonding length in reinforced concrete beams using guided wave propagation
PublicationThis paper presents theoretical and experimental investigations of guided wave propagation in reinforced concrete beams, with pre-existing debonding between steel rebars and concrete blocks, for the purpose of damage detection. The primary aim of these investigations was a detailed analysis of the possible applications of wave propagation in single and multiple debonding detection in reinforced concrete structures and reference-free...
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DEIS evaluation of the relative effective surface area of AISI 304 stainless steel dissolution process in conditions of intergranulatar corrosion
PublicationWyniki przedstawione w tej pracy stanowią dalszą część badań dotyczących procesu roztwarzania wysokostopowej stali AISI 304 w warunkach zachodzenia korozji międzykrystalicznej z wykorzystaniem techniki dynamicznej elektrochemicznej spektroskopii impedancyjnej (DEIS). Po raz pierwszy zaprezentowano zmiany względnej powierzchni efektywnej procesu roztwarzania stali AISI 304 w warunkach zachodzenia korozji międzykrystalicznej w funkcji...
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Impact of sensitization on dissolution process of AISI 304 stainless steel during intergranular corrosion evaluated using DES technique
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Pool boiling heat transfer of water-Al2O3 and water-Cu nanofluids on horizontal stainless steel smooth and rough tubes
PublicationPrzedstawiono wyniki badań eksperymentalnych przejmowania ciepła przy wrzeniu nanocieczy woda-Al2O3 i woda-Cu na poziomych rurkach ze stali nierdzewnej. Ustalono, że niezależnie od badanej koncentracji nanocząstek (0.01%, 0.1% oraz 1%) współczynnik przejmowania ciepła dla nanocieczy był wyższy niż dla wody i rósł ze wzrostem koncentracji. Ponadto współczynnik przejmowania ciepła dla nanocieczy wzrastał ze wzrostem ciśnienia.
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Experimental Evaluation of ND: YAG Laser Parameters and Sample Preparation Methods for Texturing Thin AISI 316L Steel Samples
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Effect of non-zero mean stress bending-torsion fatigue on fracture surface parameters of 34CrNiMo6 steel notched bars
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A fractographic study exploring the fracture surface topography of S355J2 steel after pseudo-random bending-torsion fatigue tests
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DEIS evaluation of the relative effective surface area of AISI 304 stainless steel dissolution process in conditions of intergranular corrosion
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Impact of sensitization on dissolution process of AISI 304 stainless steel during intergranular corrosion evaluated using DEIS technique
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The stress and strain distribution in X10CrMoVNb9-1 power engineering steel after long time degradation studied by the ESPI system
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Fatigue damage development in 10CrMo9-10 steel for power plant pipes in as-received state and after 280,000 h of exploitation
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Monitoring of fatigue damage development in as-received and exploited 10CrMo9-10 power engineering steel supported by Digital Image Correlation
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The analysis of strain response for as-received and exploited 10H2M power engineering steel subjected to low cycle fatigue in plastic regime
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Manufacturing Elements with Small Cross-Sections of 17-4 PH Steel (1.4542) with the Application of the DMLS Additive Manufacturing Method
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EVALUATING THE INFLUENCE OF BENDING STRESS ON A 1H18N9 STEEL SHAFT WEAR PROCESS IN A WATER LUBRICATED SLIDING BEARING WITH A RUBBER BUSHING
PublicationThe issue of excessive wear of shaft journals co-working with a rubber bearing has been unexplained so far. Premature and sometimes very intensive wear of ship sliding bearings in water conditions is the reason for carry out very expensive and more frequent than expected repairs. The authors (E. Piątkowska, W. Litwin) made an attempt to find a case that influences the value of this wear described in the paper “Attempt at Evaluating...
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The abrasive wear resistance of coatings manufactured on high-strength low-alloy (HSLA) offshore steel in wet welding conditions
PublicationSome marine and offshore structure elements exploited in the water cannot be brought to the surface of the water as this will generate high costs, and for this reason, they require in-situ repairs. One of the repair techniques used in underwater pad welding conditions is a wet welding method. This paper presents an investigation of the abrasive wear resistance of coatings made in wet welding conditions with the use of two grades...
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Wpływ starzenia stali budowlanej na jej właściwości mechaniczne. The effect of structural steel aging on its mechanical properties
PublicationPrzedstawiono wyniki badań właściwości mechanicznych i struktury trzech elementów stalowej konstrukcji budowlanej po długotrwałej eksploatacji.
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Experimental Evaluation of ND: YAG Laser Parameters and Sample Preparation Methods for Texturing Thin AISI 316L Steel Samples
PublicationIn mechanical and material engineering, the effect of laser texturing depends on many factors besides device specification, primarily the properties of the materials being processed, and, secondly, the preparation of the sample. Laser texturing of thin (<5 mm) samples is mostly performed utilizing short-pulse lasers, but depending on the power of the laser beam, the process can also be performed by using continuous operation lasers....
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Standard and modified falling mass impact tests on preplaced aggregatefibrous concrete and slurry infiltrated fibrous concrete
PublicationAlthough several studies have been conducted to evaluate the impact response of concrete using theAmerican Concrete Institute (ACI) 544-2R falling mass impact test, the variations in test results are themain drawback of this testing method. This study aims to reduce the variations in experimental impacttest results by introducing two simple test setup modifications; (1) using coarse or fine aggregate bed-ding as an alternative...
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Guided ultrasonic waves for detection of debonding in bars partially embedded in grout
PublicationThis paper deals with theoretical, numerical and experimental investigations of guided wave propagation in multilayered cylindrical bars with pre-existing debonding. The research focuses on a complex description of the nature of the wave phenomena occurring in a debonded specimen with a special emphasis on the influence of the location of damage on the wave conversion and diffraction. Experimental non-destructive and destructive...
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Tożsamość architektury jako odpowiedź na kontekst funkcji i miejsca na przykładzie budynku muzeum = Identity of architecture as a response to the context of function and place on the example of museum building
PublicationArchitektura starożytna, będąca przedmiotem dzieła Witruwiusza stanowi korzenie europejskiej myśli architektonicznej. Klasycyzm określił kanony i archetypy obowiązujące przez stulecia w projektowaniu muzeów. Wielowątkowość współczesnej sztuki, postęp w zakresie technologii budownictwa oraz dążenie do oryginalnością spowodowały odejście od jednej obowiązującej teorii i kanonu piękna w architekturze. Współczesne projekty muzeów reprezentują...
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The effect of pressure on heat transfer during pool boiling of water-Al2O3 and water-Cu nanofluids on stainless steel smooth tubes
PublicationPrzedstawiono wyniki badań eksperymentalnych wrzenia nanocieczy woda-Al2O3 i woda-Cu o koncentracjach nanocząstek 0.01%, 0.1% oraz 1% przy ciśnieniu absolutnym 10 kPa, 100 kPa oraz 200k Pa.
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Experimental Study on Steel Tank Model Using Shaking Table/ Badania Eksperymentalne Modelu Zbiornika Stalowego Na Stole Sejsmicznym
PublicationStalowe zbiorniki walcowe są bardzo popularnymi konstrukcjami używanymi do magazynowania produktów przemysłu chemicznego i naftowego. Ich bezpieczeństwo i niezawodność są kluczowe, ponieważ każde uszkodzenie może nieść za sobą bardzo poważne konsekwencje. Trzęsienia ziemi są najbardziej niebezpiecznymi, a zarazem najbardziej nieprzewidywalnymi obciążeniami dynamicznymi, które mogą oddziaływać na tego typu konstrukcje. Z drugiej...
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High-Performance Face Milling of 42CrMo4 Steel: Influence of Entering Angle on the Measured Surface Roughness, Cutting Force and Vibration Amplitude
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Abrasive Wear, Scuffing and Rolling Contact Fatigue of DLC-Coated 18CrNiMo7-6 Steel Lubricated by a Pure and Contaminated Gear Oil
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Effects of extreme pressure and anti-wear additives on surface topography and tool wear during MQCL turning of AISI 1045 steel
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The effect of pressure on heat transfer during pool boiling of water-Al2O3 and water-Cu nanofluids on stainless steel smooth tube
PublicationPrzedstawiono wyniki badań eksperymentalnych wrzenia nanocieczy woda-Al2O3 i woda-Cu o koncentracjach nanocząstek 0.01%, 0.1% oraz 1% przy ciśnieniu absolutnym 10 kPa, 100 kPa oraz 200k Pa.
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Use of the Simple Multicriteria Decision-Making (MCDM) Method for Optimization of the High-Alloy Steel Cutting Processby the Abrasive Water Jet
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