Relevant bibliographies by topics / VHS steel

Academic literature on the topic 'VHS steel'

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Published: 1 June 2022

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Journal articles on the topic "VHS steel"

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Nabi, Junaid, and S. Elavenil. "Analytical study on innovative VHS-steel section stub CFT columns." Asian Journal of Civil Engineering 19, no. 5 (April 3, 2018): 527–34. http://dx.doi.org/10.1007/s42107-018-0039-y.

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Jiao, H., and X. L. Zhao. "CFRP strengthened butt-welded very high strength (VHS) circular steel tubes." Thin-Walled Structures 42, no. 7 (July 2004): 963–78. http://dx.doi.org/10.1016/j.tws.2004.03.003.

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Jiao, Hui, and Xiao-Ling Zhao. "Material ductility of very high strength (VHS) circular steel tubes in tension." Thin-Walled Structures 39, no. 11 (November 2001): 887–906. http://dx.doi.org/10.1016/s0263-8231(01)00039-8.

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Jiao, Hui, and Xiao-Ling Zhao. "Tension Capacity of Very High Strength (VHS) Circular Steel Tubes after Welding." Advances in Structural Engineering 7, no. 4 (August 2004): 285–96. http://dx.doi.org/10.1260/1369433041653534.

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Jiao, Hui, and Xiao-Ling Zhao. "Strengthening Tests of Butt-Welded Very High Strength (VHS) Circular Steel Tubes." IABSE Symposium Report 86, no. 4 (January 1, 2002): 49–56. http://dx.doi.org/10.2749/222137802796337323.

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Mashiri, Fidelis R., Brian Uy, Zhong Tao, and Zhi-Bin Wang. "Concrete-filled VHS-to-steel fabricated section stub columns subjected to axial compression." Journal of Constructional Steel Research 95 (April 2014): 141–61. http://dx.doi.org/10.1016/j.jcsr.2013.11.022.

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Heidarpour, Amin, Sanel Cevro, Qian-Yi Song, and Xiao-Ling Zhao. "Behaviour of stub columns utilising mild-steel plates and VHS tubes under fire." Journal of Constructional Steel Research 95 (April 2014): 220–29. http://dx.doi.org/10.1016/j.jcsr.2013.12.007.

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Alatshan, F., and Fidelis R. Mashiri. "Finite Element Modeling of Concrete-Filled Steel Tubes: Review and Recent Developments." Applied Mechanics and Materials 330 (June 2013): 894–99. http://dx.doi.org/10.4028/www.scientific.net/amm.330.894.

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The paper reviews previous investigations in the area of finite-element modeling of concrete-filled steel tubes. The literature provides a summary of the main type of the elements that are most frequently used to simulate concrete, steel and the interaction between the steel and the concrete in the composite beam and column members. A summary of confined concrete models is presented. Finally, finite-element were developed for 12 triangular concrete filled fabricated VHS-plate stub column specimens tested and reported in previous research [1, 2]. The confined concrete models, reviewed in the literature, were employed in the simulation and comparison was made to find the most suitable model for this type of column.
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Kouichirou, Anno, and Takeshi Nishihata. "DEVELOPMENT ON OFFSHORE STRUCTURE." Coastal Engineering Proceedings 1, no. 32 (January 31, 2011): 50. http://dx.doi.org/10.9753/icce.v32.structures.50.

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Authors have developed the offshore structure for control of sea environment named S-VHS construction method, which is composed of the sloping top slit-type caisson and steel pipe piles. The sloping top form enables to realize the remarkable reduction of wave force exerted on the dike body compared with the conventional one. In this paper, hydraulic feature with wave dissipation ability and wave force reduction effect are verified through some hydraulic experiments. After the preliminary study for the valid structure form, reflection and transmission ability for the selected structure models were tested with the hydraulic experiment relevant to the ratio of caisson width and wave length. Finally, wave force experiment was executed and it revealed the performance of wave force reduction. Based on the results, we proposed specific design wave force formula for S-VHS construction method.
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Jiao, H., and X. L. Zhao. "Imperfection, residual stress and yield slenderness limit of very high strength (VHS) circular steel tubes." Journal of Constructional Steel Research 59, no. 2 (February 2003): 233–49. http://dx.doi.org/10.1016/s0143-974x(02)00025-1.

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Dissertations / Theses on the topic "VHS steel"

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Jiao, Hui 1963. "The behaviour of very high strength (VHS) members and welded connections." Monash University, Dept. of Civil Engineering, 2003. http://arrow.monash.edu.au/hdl/1959.1/9417.

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Rousseau, Camille. "Mécanismes d'endommagement en fatigue-corrosion d’un acier à très haute résistance mécanique." Thesis, Paris, HESAM, 2021. http://www.theses.fr/2021HESAE049.

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Pour répondre aux exigences mécaniques de l’arbre de turbine basse pression des moteurs LEAP, Safran Aircraft Engines a développé l’acier martensitique ML340. Grâce à la coprécipitation intermétallique-carbure, ce dernier dispose d’une très haute résistance mécanique mais est sensible aux effets de l’environnement, et plus particulièrement à la corrosion par piqûres. Cette étude vise alors à identifier des leviers d’amélioration vis-à-vis de la prise en compte de ces défauts de surface lors du dimensionnement en fatigue, et vis-à-vis des mesures de prévention et protection mises en œuvre pour limiter leur apparition. Dans cet objectif, une caractérisation de la microstructure et des propriétés mécaniques de l’acier ML340, ainsi que de sa sensibilité à la corrosion et à l’hydrogène, a d’abord permis de mettre en évidence des interactions fortes matériau-environnement susceptibles de favoriser l’amorçage de fissures en fatigue. Des essais de fatigue uniaxiale (R=0) en milieu NaCl, conduits à différentes fréquences, ont ensuite permis de quantifier l’effet de la corrosion sur la tenue en fatigue de l’acier ML340, d’identifier des effets de synergies entre microstructure, chargement mécanique et corrosion, et enfin de questionner l’implication de l’hydrogène dans les processus d’amorçage et propagation de fissures. Un scénario d’endommagement en fatigue-corrosion a alors été établi et simplifié en étapes élémentaires. Sur cette base, un modèle prévisionnel analytique a finalement été proposé. Il permet une estimation fiable de la durée de vie en fatigue-corrosion avec notamment la prise en compte des effets de fréquence observés expérimentalement.-------------------------------------------------------
To meet the high mechanical requirements of the low-pressure turbine (LPT) shaft in the LEAP turbofan engines, a very high strength steel has been developed by Safran Aircraft Engines. The structural parts of engines must withstand harsh conditions, including cyclic loading and corrosive environment. This study aims to identify improvement levers with respect to the consideration of corrosion during the LPT shaft design and maintenance, but also to the prevention and protection actions set up to limit its apparition. For this purpose, a microstructural and mechanical characterization of the material, coupled with a study of its sensitivity to corrosion and hydrogen, has first allowed to highlight strong material-environment interactions, likely to promote fatigue crack initiation. Alternated uniaxial fatigue tests (R=0), conducted at different frequencies in a NaCl environment, allowed to quantify the effect of corrosion on the ML340 fatigue resistance, to identify synergistic effects between microstructure, cyclic stresses and deformation, and corrosion, and finally to investigate the possible role of hydrogen produced by cathodic reactions. From these results, the corrosion fatigue damage process was simplified into elementary steps and a predictive analytical model was finally proposed. A reliable estimation of the corrosion fatigue resistance has been obtained, especially regarding the frequency effects observed experimentally.-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
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Oriol, Pierre. "Comportement des aciers à rails vis-à-vis de l'hydrogène : diffusion, perméation et fragilisation." Châtenay-Malabry, Ecole centrale de Paris, 1987. http://www.theses.fr/1987ECAP0041.

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Etude de la diffusion et de la perméation a l'hydrogène dans différentes nuances d'aciers à rail en fonction de la teneur en soufre, du sens de prélèvement des éprouvettes et du taux de corroyage. Étude de la fragilisation différée sur une nuance dure par suivi de l'émission acoustique en fonction du chargement en hydrogène. Examen de l'influence de l'hydrogène sur le comportement en traction des différentes nuances
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Ly, Céline. "Caractérisation d'aciers à très haute limite d'élasticité vis-à-vis de la fragilisation par l’hydrogène." Thesis, Châtenay-Malabry, Ecole centrale de Paris, 2009. http://www.theses.fr/2009ECAP0004/document.

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Les aciers THLE ont la particularité de posséder à la fois une bonne ductilité et de hautes caractéristiques mécaniques. Ceci les rend particulièrement adaptés pour l'industrie automobile, dont les principales exigences sont l'allègement du véhicule et la sécurité des passagers. Toutefois, il est bien connu que l'augmentation des caractéristiques mécaniques accroît la susceptibilité à la fragilisation par l'hydrogène. Ce travail de thèse est consacré à l'étude de la susceptibilité vis-à-vis de la fragilisation par l'hydrogène de quatre aciers THLE : un DP, un TRIP, un CP et le BAS 100, un acier enrichi en vanadium et chrome. Un acier aux propriétés mécaniques plus modestes, dénommé HE (Haute Elasticité) a servi de référence. Les caractéristiques de transport de l'hydrogène dans ces aciers ont été étudiées, grâce à des essais de perméation électrochimique avec chargement en milieu acide, éventuellement additionné d'un promoteur d'hydrogénation (l'arsenic). Comme observé sur d'autres aciers, il faut souligner l'absence de conditions d'entrée stationnaires, dont il faut tenir compte dans l'évaluation des caractéristiques de diffusion. La diffusivité à température ambiante est apparue élevée pour tous les aciers, et une corrélation a été établie entre la microstructure et la diffusivité de l'hydrogène dans le matériau : plus la microstructure est fine et complexe, moins la diffusivité est élevée. De plus, l'évaluation des concentrations subsurfaciques sur les courbes en présence d'arsenic a révélé des valeurs relativement élevées pour les trois aciers aux caractéristiques mécaniques les plus élevées (TRIP 800, CP 800 et BAS 100). Ces valeurs sont conformes avec les teneurs en hydrogène diffusible mesurées par dosage juste après la perméation. Les dosages d'hydrogène résiduel, réalisés par désorption thermique sous vide après perméation, ont par ailleurs indiqué que le piégeage profond dans ces aciers était peu important, même après chargement sous polarisation et en présence d'arsenic. Ceci peut s'expliquer par des structures très bien élaborées, très fines et comportant peu de défauts. Des essais de traction ont montré qu'une hydrogénation sévère (en présence d'un promoteur) était nécessaire pour obtenir une fragilisation notable des aciers THLE. Hormis les cas extrêmes de dégradation spontanée par HIC (cloquage, fissuration), la fragilisation est imputable à l'hydrogène diffusible ou faiblement piégé car les teneurs en hydrogène piégé profondément restent négligeables. Dans les conditions industrielles, en décapage acide HCl en présence d'inhibiteurs, les résultats de perméation, de dosage et de traction s'accordent à montrer l'absence de fragilisation sur ce type d'acier. Les inhibiteurs testés semblent jouer un rôle de barrière physique, par adsorption sur le métal nu, limitant ainsi tant l'entrée d'hydrogène que la corrosion
The distinctive feature of Very High Strength Steels (VHSS) is to present a good combination of ductility and high strength. This makes them particularly interesting for the automotive industry because of the increasing demand for the reduction of car weight and the improvement of passengers security. However, it is known that increasing mechanical characteristics enhances susceptibility to hydrogen embrittlement. The aim of this doctoral thesis work is to study the susceptibility to hydrogen embrittlement of four very high strength steels : a DP (Dual Phase), a TRIP (Transformation Induced Plasticity), a CP (Complex Phase) and BAS, a Cr-V enriched high strength steel. Low alloyed steel with lower mechanical properties, HE (high Elasticity) has been used as a reference. Hydrogen transport characteristics in these steels were investigated thanks to electrochemical permeation tests including charging in acid solution, possibly with the addition of a hydrogenation promoter (arsenic). As already observed on other steels, the absence of stationary entry conditions is to be underlined due to its necessity for the evaluation of diffusion characteristics. Diffusivity at room temperature has appeared to be very high in each of the five steels and a correlation between hydrogen diffusion coefficient and microstructure has been drawn : the finer and the more complex it is, the lower is the apparent diffusion coefficient. Moreover, sub-surface concentrations calculated on the permeation transient in the presence of arsenic have revealed relatively high values for the three steels with the higher mechanical properties (TRIP 800, CP 800 and BAS 100). These values comply with the diffusible hydrogen content measured by thermal desorption technique just after permeation. Otherwise, residual hydrogen dosage tests by thermal desorption under vacuum, have indicated that deep trapping is very low for these steels, even after charging under polarisation and in the presence of arsenic. These results can be explained by fine and homogeneous microstructures that are very well developed with few lattice defects. Ordinary tensile tests have shown the necessity of extreme charging conditions (in the presence of a promoter) for VHS steel embrittlement. With an exception in the case of extreme spontaneaous damages created by HIC (blistering, cracking), embrittlement is imputable to diffusible and weakly trapped hydrogen because deeply trapped hydrogen content is very low. In industrial conditions, during acid pickling while in the presence of inhibitors, permeation, dosage and tensile tests results suggest the absence of embrittlement for the steels. Tested inhibitors seem to act as a physical barrier, by adsorption on the bare steel surface, and limit that way hydrogen absorption and corrosion
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Garcia, Rodriguez Daniel. "Optimisation d'un code de dynamique des dislocations pour l'étude de la plasticité des aciers ferritiques." Thesis, Grenoble, 2011. http://www.theses.fr/2011GRENI075/document.

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Ces travaux de thèse s’inscrivent au sein d’une démarche multi-échelles visant à améliorer lacompréhension de la fragilisation par l’irradiation de l’acier de cuve. Dans ce cadre, nous nousintéressons à la description de la mobilité des dislocations dans la ferrite, l’une des entrées clépour les codes de dynamique de dislocations (DD). Nous présentons ainsi une revuebibliographique exhaustive des différentes théories et expressions de la mobilité, à partir delaquelle nous proposons une nouvelle expression pour les dislocations vis. Cette loi, utilisablepour la première fois dans le régime de transition ductile-fragile, permet de reproduire lesprincipales observations expérimentales disponibles à ce niveau. Finalement, nous montronsles améliorations apportées au code de DD Tridis BCC 2.0, qui intègrent la nouvelle loi demobilité avec une nouvelle gestion des segments de dislocation permettant de stabiliser etaccélérer des simulations complexes avec prise en compte du glissement dévié
The present work is part of a larger multi-scale effort aiming to increase knowledge of thephysical phenomena underneath reactor pressure vessel irradiation embrittlement. Withinthis framework, we focused on the description of dislocation mobility in BCC iron, which is oneof the key inputs to dislocation dynamics (DD) simulation codes. An extensive bibliographicreview shows that none of the available expressions can deal with the ductile-fragile transitiondomain of interest. Here, a new screw mobility law able to reproduce the main experimentalobservations is introduced building on the previous models. The aforementioned law is usedtogether with an improved dislocations dynamics code Tridis BCC 2.0, featuring bothperformance and dislocations segments interaction management enhancements, that allowsfor complex DD simulations of BCC iron structures with cross-slip
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Thomas, Gareth James. "Advanced materials for plasma facing components in fusion devices." Thesis, University of Oxford, 2009. http://ora.ox.ac.uk/objects/uuid:f8ba1ae1-f303-4c32-877e-dca421a3cb5c.

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This thesis describes the design, manufacture and characterisation of thick vacuum plasma sprayed tungsten (W) coatings on steel substrates. Fusion is a potentially clean, sustainable, energy source in which nuclear energy is generated via the release of internal energy from nuclei. In order to fuse nuclei the Coulomb barrier must be breached - requiring extreme temperatures or pressures – akin to creating a ‘star in a box’. Tungsten is a promising candidate material for future fusion reactors due to a high sputtering threshold and melting temperature. However, the large coefficient of thermal expansion mismatch with reactor structural steels such as the low activation steel Eurofer’97 is a major manufacturing and in-service problem. A vacuum plasma spraying approach for the manufacture of tungsten and tungsten/steel graded coatings has been developed successfully. The use of graded coatings and highly textured 3D interface surfi-sculpt substrates has been investigated to allow the deposition of thick plasma sprayed tungsten coatings on steel substrates. Finite element models have been developed to understand the residual stresses that develop in W/steel systems and made use of experimental measurements of coating thermal history during manufacture and elastic moduli measured by nano-indentation. For both the graded and surfi-sculpt coating, the models have been used to understand the mechanism of residual stress redistribution and relief in comparison with simple W on steel coatings, particularly by consideration of stored strain energy. In the case of surfi-sculpt W coatings, the patterned substrate gave rise to regular stress concentrating features, and allowed 2mm thick W coatings to be produced reproducibly without delamination. Preliminary through thickness residual stress measurements were compared to model predictions and provided tentative evidence of significant W coating stress relief by regulated coating segmentation.
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Books on the topic "VHS steel"

1

DeMaria, Rusel, and Zach Meston. Sega Genesis Secrets, Volume 3. Rocklin, CA: Prima Publishing, 1992.

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Perotti, Giovanni, ed. Sega Mega Drive Game Secrets: Strategie e Segreti, Volume 2. Via Rosellini, Milano, Italy: Jackson Libri, 1993.

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Arnold, J. Douglas. Awesome Sega Genesis Secrets II. Lahaina, HI: Sandwich Islands Publishing, 1993.

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Perotti, Giovanni, ed. Sega Mega Drive Game Secrets: Strategie e Segreti, Volume 3. Via Rosellini, Milano, Italy: Jackson Libri, 1993.

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Perotti, Giovanni, ed. Sega Mega Drive Game Secrets: Strategie e Segreti, Volume 1. Via Rosellini, Milano, Italy: Jackson Libri, 1993.

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Arnold, J. Douglas, and Zach Meston. Awesome Sega Genesis Secrets 3. Lahaina, HI: Sandwich Islands Publishing, 1993.

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Schwartz, Steven A. The Big Book of Nintendo Games. Greensboro, USA: Compute Books, 1991.

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Mcdermott, Leeanne. GamePro Presents: Sega Genesis Games Secrets: Greatest Tips. Rocklin: Prima Publishing, 1992.

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Inc, Game Counselor. Game Counselor's Answer Book for Nintendo Players. Redmond, USA: Microsoft Pr, 1991.

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Tom, Badgett, ed. Official Sega Genesis and Game Gear strategies, 2ND Edition. Toronto: Bantam Books, 1991.

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Book chapters on the topic "VHS steel"

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Ling, Tong-Wei, Xiao-Ling Zhao, and Riadh Al-Mahaidi. "Tests and design of longitudinal fillet welds in very high strength (VHS) steel circular tubes." In Advances in Steel Structures (ICASS '02), 245–52. Elsevier, 2002. http://dx.doi.org/10.1016/b978-008044017-0/50028-7.

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Zhao, X., and H. Jiao. "Simulation of CFRP strengthened butt-welded Very High Strength (VHS) circular steel tubes in tension." In Tubular Structures XII, 571–76. Taylor & Francis, 2008. http://dx.doi.org/10.1201/9780203882818.ch65.

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Ouakki, Moussa, M. Galai, Z. Aribou, M. Rbaa, B. Lakhrissi, and M. Cherkaoui. "Novel Compounds of Imidazole Derivatives as Effective Corrosion Inhibitors for Mild Steel in Hydrochloric Acid Solution." In New Challenges and Industrial Applications for Corrosion Prevention and Control, 132–55. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-2775-7.ch006.

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The inhibition performance of two imidazole derivatives, IM-Cl and IM-CH3, on the corrosion behavior of MS in 1M HCl acid solution was studied through weight loss method and electrochemical tests. The results obtained from the electrochemical methods show that inhibition efficiency increases with the increase of inhibitors concentration. The adsorption of inhibitors on the mild steel surface obeys Langmuir adsorption isotherm. The corrosion protection was once also investigated with the aid of UV–Vis spectrophotometry. SEM-EDX was performed and discussed for surface study of uninhibited and inhibited mild steel samples.
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Jones, Kent. "Steel Trade and National Welfare." In Politics vs Economics in World Steel Trade, 1–12. Routledge, 2017. http://dx.doi.org/10.4324/9781315099057-1.

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Jones, Kent. "Steel Protectionism in Historical Perspective." In Politics vs Economics in World Steel Trade, 13–28. Routledge, 2017. http://dx.doi.org/10.4324/9781315099057-2.

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Jones, Kent. "Steel Trade Policy in Crisis." In Politics vs Economics in World Steel Trade, 83–109. Routledge, 2017. http://dx.doi.org/10.4324/9781315099057-5.

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Jones, Kent. "The Battle Lines of Steel Protectionism." In Politics vs Economics in World Steel Trade, 29–47. Routledge, 2017. http://dx.doi.org/10.4324/9781315099057-3.

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Jones, Kent. "The World Steel Market in Transition." In Politics vs Economics in World Steel Trade, 49–82. Routledge, 2017. http://dx.doi.org/10.4324/9781315099057-4.

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Jones, Kent. "The Crisis Renewed: Towards Binding Voluntary Restraint." In Politics vs Economics in World Steel Trade, 110–31. Routledge, 2017. http://dx.doi.org/10.4324/9781315099057-6.

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Jones, Kent. "The Collapse of the TPM and the Establishment of Comprehensive Steel Pacts." In Politics vs Economics in World Steel Trade, 132–56. Routledge, 2017. http://dx.doi.org/10.4324/9781315099057-7.

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Conference papers on the topic "VHS steel"

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F. R., Mashiri, Uy B., and Shah B. "Stub Column Tests of Concrete-Filled VHS-Plate Fabricated Sections." In 4th International Conference on Steel & Composite Structures. Singapore: Research Publishing Services, 2010. http://dx.doi.org/10.3850/978-981-08-6218-3_cc-th021.

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JIAO, H., and X. L. ZHAO. "SHEAR BAND ORIENTATION OF VERY HIGH STRENGTH (VHS) CIRCULAR STEEL TUBES." In Proceedings of the Third Australasian Congress on Applied Mechanics. WORLD SCIENTIFIC, 2002. http://dx.doi.org/10.1142/9789812777973_0087.

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Huang, Zhenyu, Xinxiong Huang, Weiwen Li, Yingwu Zhou, Lili Sui, and J. Y. Richard Liew. "Experimental behaviour of very high-strength concrete-encased steel composite column subjected to axial compression and end moment." In 12th international conference on ‘Advances in Steel-Concrete Composite Structures’ - ASCCS 2018. Valencia: Universitat Politècnica València, 2018. http://dx.doi.org/10.4995/asccs2018.2018.7034.

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A type of cost-effective and very high strength concrete (VHSC) with 28-day compressive strength of 100-150 MPa is developed for applications in concrete-encased steel composite column constructions. This paper experimentally investigates the structural behaviour of VHSC encased steel composite columns based on a series of pure compression and eccentric compression tests. It is found that such high-strength composite column exhibits brittle post peak behaviour and low ductility but with acceptable compressive resistance. Throughout the tests, the main failure of VHSC encased column under compressive load is brittle spalling of concrete followed by local buckling of the reinforcement bars. The splitting and slippage may occur between concrete and steel section due to bending downward action. The confinement effect by the shear stirrups designed based on normal reinforced concrete codes may not be sufficient. Composite column subjected to initial flexural cracking due to end moment load with large eccentricity may experience degradation in the stiffness and ultimate resistance so that plastic design resistance may not be achieved. Analytical studies show that the N-M interaction model based on current design codes may over-predict the combined resistance of the composite columns. Therefore, a modified elastic-plastic design approach based on strain compatibility is developed to evaluate the compressive resistance of concrete encased composite columns. The validation against the test data shows a reasonable and conservative estimation on the combined resistance of VHSC encased composite columns.
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Kimura, Kazuhiro. "Creep Rupture Strength Evaluation With Region Splitting by Half Yield." In ASME 2013 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/pvp2013-97819.

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Creep strength of ferritic and austenitic steels has been investigated on the correlation between stress vs. creep rupture life curve and 50% of 0.2% offset yield stress (half yield) at the temperatures. Inflection of stress vs. creep rupture life curve was recognized on ferritic creep resistant steels with martensitic or bainitic microstructure. However, no identifiable correlation was observed on ferritic steels with ferrite and pearlite microstructure, as well as austenitic steels and superalloys except for several alloys. Ferritic steel with martensitic or bainitic microstructure indicates softening during creep exposure, however, hardening due to precipitation takes place in the ferritic steel with ferrite and pearlite microstructure and austenitic steels. This difference in microstructural evolution is associated with indication of inflection at half yield. Stress range of half yield in the stress vs. creep life diagram of creep strength enhanced ferritic steels is wider than that of conventional ferritic creep resistant steels with martensitic or bainitic microstructure. As a result of wide stress range of boundary condition, risk of overestimation of long-term creep rupture strength by extrapolating the data in high-stress regime to low-stress regime is considered to be high for creep strength enhanced ferritic steels.
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Oliveira, Ricardo F., Manuel V. Silva, Ana V. Machado, Manuel Oliveira, Helena Maria Cabral-Marques, Senhorinha F. Teixeira, and José Carlos Teixeira. "Experimental Assessment of Emitted Dose From Valved Holding Chamber Devices." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-38846.

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Due to the increasing worldwide incidence of asthma, a growing usage of inhalation devices has been observed. Some of the pressurized Metered Dose Inhalers (pMDI) limitations have been overcome by the introduction of newly and improved Valved Holding Chambers (VHC), resulting in good patient acceptance. The efficiency is assessed by the VHC Emitted Dose (ED), i.e. the amount of drug available to the patient. Using the pMDI salbutamol sulfate formulation (Ventolin® HFA-134a) as the test drug, several VHC devices were assessed. These latest were grouped by material characteristics: dissipative (OptiChamber Diamond®, AeroChamber Plus®, Vortex®, A2A Spacer®), non-dissipative (SpaceChamber Plus®, Compact SpaceChamber Plus®, Volumatic®) and stainless steel (Nebuchamber®). The pMDI + VHC were assembled to a filter housing, which comprises an induction port with similar USP Throat dimensions, and connected to a vacuum pump (calibrated at 15, 26 and 40 L/min). Using UV-Vis Spectrophotometry equipment at 244 nm, it was possible to determine its concentration for later mass calculation. For all the VHC devices tested, the total mass recovery percentage was between 85% and 120%. At 26 L/min, the Vortex® VHC has shown the highest ED (47.3 ± 1.8 %). The ED may not be dependent on the volume of the VHC. Although, further analysis of the results suggests the existence of a linear correlation between the ED and the VHC body length. SpaceChamber Plus® results show an increase of the ED and, subsequently, a decrease in VHC deposition fraction, with the increase of airflow.
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6

Yaguchi, H., S. Murakami, N. Fujitsuna, T. Shinya, M. Yamada, and T. Sakai. "Long-Term Isothermal Aging Behavior of V-Modified 2.25Cr-1Mo Steels." In ASME/JSME 2004 Pressure Vessels and Piping Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/pvp2004-3067.

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Long-term isothermal aging behavior up to 30,000h has been investigated in V-modified 2.25Cr-1Mo steels. When impurity elements were added, FATT in Charpy impact test vs. aging time curves showed basically of parabolic type, indicating the importance of segregation of impurities as the critical factor in controlling temper embrittlement. On the other hand, when the amount of impurities was small, FATT showed complex behavior with aging time. This suggests the importance of other factors in controlling temper embrittlement such as recovery of dislocations and enlargement of various carbide precipitates. When the degree of temper embrittlement after aging is compared in terms of the increase in FATT due to aging between the modified steels and the conventional 2.25Cr-1Mo steels, it is found to be small in the modified steel at the same impurity level (J-factor). It was also found that the modified steels showed no hydrogen embrittlement. No change was observed in FATT after hydrogen charge on the contrast to the conventional steel, which showed significant increase in FATT. This effect has been attributed to the small amount of diffusible hydrogen content in the modified steel by the presence of hydrogen trapping sites, which is present even after long-term isothermal aging.
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7

Mohammadijoo, Mohsen, Laurie Collins, Muhammad Rashid, and Muhammad Arafin. "Influence of Steel Chemistry and Field Girth Welding Procedure on Performance of API X70 Line Pipe Steels." In 2020 13th International Pipeline Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/ipc2020-9721.

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Abstract Owing to recent concerns regarding pipeline field girth weld performance, particularly heat affected zone (HAZ) softening and toughness, EVRAZ North America has initiated a research program to evaluate the response of API grade line pipe to the current field girth welding practices. In particular, this study aims to elucidate the role of steel alloy design as well as the welding procedure on field girth weld and HAZ properties. This understanding is critical to balance the detrimental effects of HAZ softening on the overall joint strength against factors affecting HAZ toughness. A selection of several different steels with different levels of alloying elements, Ceq and Pcm have been subjected to welding trials to assess the effects of chemistry on joint performance. Furthermore, an analysis on the effect of welding process parameters on the joint properties has been made. The welds, fabricated via a manual shielded metal arc welding (M-SMAW) process, were evaluated in terms of toughness, local vs global strain distribution during tensile testing using digital image correlation (DIC) technique, and hardness contour mapping of the weld and HAZ regions. The results explicitly show that the extent of HAZ softening decreased as the amount of Mo, Mn, Ti/N and Ceq increased. However, this alloying addition resulted in a detrimental effect on the HAZ toughness, particularly towards the cap and fill passes. The HAZ softening increased as the inter-pass temperature and the welding heat input increased. In addition, the strain analysis confirmed the weld passes towards the root/hot passes are more prone to HAZ softening compared with the upper cap and fill passes.
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8

Park, Y. J., J. B. Choi, and Y. J. Kim. "Application of a Knowledge-Based Information System for Life Extension of Steel Making Plant." In ASME/JSME 2004 Pressure Vessels and Piping Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/pvp2004-2289.

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In this paper, a knowledge-based information system for the plant operation of steel making company has been proposed. This system, which is named as K-VRS (Knowledge-based Virtual Reality System), provides a connection between ERP PM module and knowledge-based engineering methodologies, and thus, enables network-based highly effective PM process. While the virtual plant is used for the master of K-VRS, there are four expert modules attached; engineering document management module, real time lifetime estimation module, fitness for service module and risk-based inspection module. Each module provides engineering knowledge based evaluation and judgment for more effective PM. K-VRS provides collaborative and concurrent working environment to workers and relevant experts. The developed system is expected to play a great role for plant life extension.
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Chopra, Omesh K., and William J. Shack. "The Effect of LWR Coolant Environments on the Fatigue Life of Reactor Materials." In ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/pvp2006-icpvt-11-93889.

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The existing fatigue strain–vs.–life (ε–N) data illustrate potentially significant effects of light water reactor (LWR) coolant environments on the fatigue resistance of pressure vessel and piping steels. This paper reviews the existing fatigue ε–N data for carbon and low–alloy steels and austenitic stainless steels in LWR coolant environments. The effects of key material, loading, and environmental parameters, such as steel type, strain amplitude, strain rate, temperature, dissolved oxygen level in water, flow rate, surface finish, and heat-to-heat variation, on the fatigue lives of these steels are summarized. An updated version of the ANL statistical models is presented for estimating the fatigue ε–N curves for these steels as a function of the material, loading, and environmental parameters. The Fen (environmental fatigue correction factor) approach for incorporating the effects of LWR coolant environments into the fatigue evaluations of the American Society of Mechanical Engineers Code is presented.
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Levy, Alan, and Yong-Fa Man. "Surface Degradation of Ductile Metal in Elevated Temperature Gas-Particle Streams." In ASME 1985 International Gas Turbine Conference and Exhibit. American Society of Mechanical Engineers, 1985. http://dx.doi.org/10.1115/85-gt-91.

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The mechanisms and rates of erosion and combined erosion-corrosion of 9CrlMo steel and 310SS at elevated temperatures were investigated to better understand the behavior of piping steels in fluidized bed combustor environments. Tests were performed in a partially inert gas atmosphere to study erosion behavior and in an air atmosphere to study combined erosion-corrosion behavior. It was determined that the erosion rate remained constant or decreased with temperature in nitrogen until a temperature was reached at which the tensile strength v.s. temperature curve of the alloy markedly changed its negative slope. Above this temperature the erosion rate increased rapidly with temperature. In an erosion-corrosion environment corrosion was the dominant mechanism at all test conditions. At higher temperatures and velocities the material loss mechanism changed from low loss rate chipping of the scale to high loss rate periodic spalling. The continuous scale formed on 9CrlMo steel in air appeared to protect the metal surface, decreasing its loss rate in α=30° tests compared to that of 310SS tested at the same conditions in nitrogen where a continuous scale did not form.
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Reports on the topic "VHS steel"

1

Ross, Jeanne M. Traycans: Tinplate vs. Tin-Free Steel. Phase 1. Fort Belvoir, VA: Defense Technical Information Center, May 1991. http://dx.doi.org/10.21236/ada236686.

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2

Backfish, Michael. Electron Cloud in Steel Beam Pipe vs Titanium Nitride Coated and Amorphous Carbon Coated Beam Pipes in Fermilab's Main Injector. Office of Scientific and Technical Information (OSTI), April 2013. http://dx.doi.org/10.2172/1151749.

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3

Moore, Christopher, Susan Stuver, and Kristine Wiley. Final Report - Classification of Methane Emissions from Industrial Meters, Vintage vs Modern Plastic Pipe, and Plastic-lined Steel and Cast-Iron Pipe. Office of Scientific and Technical Information (OSTI), August 2019. http://dx.doi.org/10.2172/1556081.

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4

EXPERIMENTAL VS. THEORETICAL DESIGN APPROACHES FOR THIN-WALLED COLD-FORMED STEEL BEAM-COLUMNS. The Hong Kong Institute of Steel Construction, March 2019. http://dx.doi.org/10.18057/ijasc.2019.15.1.8.

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