classification and mechanisms of steel transformation
Tài liệu Inspection, Evaluation and Repair of Steel Structures P2 ppt
Ngày tải lên :
19/01/2014, 23:20
... A588/A588M steel (a low-carbon weathering steel containing copper) and would corrode when coupled with A588/A588M steel There may also be a potential difference between rivet steel and the adjoining ... contact surfaces of the structure and seal, galvanic corrosion if the seal plate is of a dissimilar metal to that of the structure itself, or erosion corrosion if abrasive sand and silt particles ... members and connections and not just view them from a distance Inspectors should use various measuring scales, magnifying glasses, and other hand tools to identify, measure, and locate areas of concerns...
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Tài liệu Inspection, Evaluation and Repair of Steel Structures P1 docx
Ngày tải lên :
19/01/2014, 23:20
... hydroxide often forms Deposits of film-forming materials such as oil and grease and sand and silt can also contribute to corrosion by creating crevices and ion concentration cells (2) Corrosion of steel ... steel assembly composed of two channels and two 12-mm- (1/2-in.-) thick plates The use of a channel with upturned legs resulted in ponding of water that caused pitting and scaling corrosion of ... 2001 Engineering and Design INSPECTION, EVALUATION AND REPAIR OF HYDRAULIC STEEL STRUCTURES Purpose This manual describes the inspection, evaluation, and repair of hydraulic steel structures,...
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Tài liệu Báo cáo khoa học: Models and mechanisms of O-O bond activation by cytochrome P450 A critical assessment of the potential role of multiple active intermediates in oxidative catalysis doc
Ngày tải lên :
19/02/2014, 16:20
... kinetic analysis of P450 function Studies on the oxidative transformation of 1-methyl-2phenylcyclopropane and its mono-, di-, and trideuteriomethyl congeners by microsomal CYP2B1 and CYP2E1 suggested ... lifetimes of carbon-centred radicals derived from a diverse set of substrates are on the order of about 10)10 s [98] Moreover, the randomness of the apparent intramolecular KIEs for unrearranged and ... presence of catalase, whereas superoxide anion was likely to be of minor importance in formation of the radical cations [166] Collectively, the drastic disruption of the C- and N-oxidative biotransformation...
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6 Coating of Steel Structures...Hydroblasting and Coating of Steel Structures.. potx
Ngày tải lên :
05/03/2014, 19:20
... Hydroblasting and Coating of Steel Structures Hyd robIast ing and Coating of Steel Structures Andreas W Momber Privatdozent, Department of Mining, Metallurgy and Earth Sciences, RWTH ... 3.Building, Iron and steel - Cleaning 1.Title 620.1’06 ISBN 185617395X Library of Congress Cataloging-in-PublicationData Momber, Andreas W., 1959 Hydroblasting and coating of steel structures / Andreas ... Embedded abrasive particles Wettability of steel substrates Roughness and profile of substrates Aspects of substrate surface integrity 133 136 138 144 Hydroblasting Standards 6.1 Introduction 6.2 Initial...
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Báo cáo " Classification and assessment of bioclimatic conditions for tourism, health resort and some weather therapies in Vietnam " pdf
Ngày tải lên :
14/03/2014, 15:20
... conditions and these are the best places for human health in general and for tourism, excursion and sea vacation in particular Results and discussions The results of classification and assessment of ... daylight in lowland area in term of assessment for development of tourism activities as well as existence of fog during the daylight in highland in term of assessment for health resort and some weather ... analysis and quantitative method, this paper presents the results of classification and assessment of bioclimatic conditions for two ultimate purposes: (i) for the development of tourism, excursion and...
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Hydroblasting and Coating of Steel Structures potx
Ngày tải lên :
14/03/2014, 17:20
... Hydroblasting and Coating of Steel Structures Hyd robIast ing and Coating of Steel Structures Andreas W Momber Privatdozent, Department of Mining, Metallurgy and Earth Sciences, RWTH ... 3.Building, Iron and steel - Cleaning 1.Title 620.1’06 ISBN 185617395X Library of Congress Cataloging-in-PublicationData Momber, Andreas W., 1959 Hydroblasting and coating of steel structures / Andreas ... Embedded abrasive particles Wettability of steel substrates Roughness and profile of substrates Aspects of substrate surface integrity 133 136 138 144 Hydroblasting Standards 6.1 Introduction 6.2 Initial...
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Familial breast cancer - The classification and care of women at risk of familial breast cancer in primary, secondary and tertiary care potx
Ngày tải lên :
15/03/2014, 00:20
... This guideline offers best practice advice on the classification and care of women at risk of familial breast cancer Treatment and care should take into account patients’ needs and preferences ... (‘Familial breast cancer: the classification and care of women at risk of familial breast cancer in primary, secondary and tertiary care’) gives details of the methods and the evidence used to develop ... relatives: grandparent, grandchild, aunt, uncle, niece and nephew; half sister and half brother Third-degree relatives: great grandparent, great grandchild, great aunt, great uncle, first cousin, grand...
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Viruses STRUCTURE, CLASSIFICATION AND PHYSIOLOGY OF VIRUSES
Ngày tải lên :
15/03/2014, 13:08
... things (herpes and HIV in humans, for example) Viruses are found everywhere Viruses consist of a core of nucleic acid, either DNA or RNA, and a protective coat of protein molecules and sometimes ... Viruses The Boundary of Life At the boundary of life, between the macromolecules (which are not alive) and the prokaryotic cells (which are), lie the viruses and bacteriophages (phages) ... sometimes lipids In isolation, viruses and bacteriophages show none of the expected signs of life They not respond to stimuli, they not grow, they not any of the things we normally associate with...
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6 Coating of Steel Structures Hydroblasting and Coating of Steel Structures pot
Ngày tải lên :
22/03/2014, 12:20
... Hydroblasting and Coating of Steel Structures Hyd robIast ing and Coating of Steel Structures Andreas W Momber Privatdozent, Department of Mining, Metallurgy and Earth Sciences, RWTH ... 3.Building, Iron and steel - Cleaning 1.Title 620.1’06 ISBN 185617395X Library of Congress Cataloging-in-PublicationData Momber, Andreas W., 1959 Hydroblasting and coating of steel structures / Andreas ... Embedded abrasive particles Wettability of steel substrates Roughness and profile of substrates Aspects of substrate surface integrity 133 136 138 144 Hydroblasting Standards 6.1 Introduction 6.2 Initial...
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báo cáo hóa học:" Classification and treatment of proximal humerus fractures: inter-observer reliability and agreement across imaging modalities and experience" potx
Ngày tải lên :
20/06/2014, 07:20
... The impact of stereovisualisation of three-dimensional CT datasets on the inter- and intraobserver reliability of the AO/OTA and Neer classifications in the assessment of fractures of the proximal ... improve the Neer and AO classifications of proximal humeral fractures Acta Orthop Scand 1999, 70:325-8 Shrader MW, Sanchez-Sotelo J, Sperling JW, Rowland CM, Cofield RH: Understanding proximal ... analysis, classification, and treatment J Shoulder Elbow Surg 2005, 14:497-505 Kristansen B, Anderson UL, Olsen CA, et al: The Neer classification of fractures of the proximal humerus An assessment of...
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6 Coating of Steel Structures Hydroblasting and Coating of Steel Structures docx
Ngày tải lên :
27/06/2014, 17:20
... Hydroblasting and Coating of Steel Structures Hyd robIast ing and Coating of Steel Structures Andreas W Momber Privatdozent, Department of Mining, Metallurgy and Earth Sciences, RWTH ... 3.Building, Iron and steel - Cleaning 1.Title 620.1’06 ISBN 185617395X Library of Congress Cataloging-in-PublicationData Momber, Andreas W., 1959 Hydroblasting and coating of steel structures / Andreas ... Embedded abrasive particles Wettability of steel substrates Roughness and profile of substrates Aspects of substrate surface integrity 133 136 138 144 Hydroblasting Standards 6.1 Introduction 6.2 Initial...
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Inspection Evaluation And Repair Of Steel structures Part 1 docx
Ngày tải lên :
05/08/2014, 11:20
... 2001 Engineering and Design INSPECTION, EVALUATION AND REPAIR OF HYDRAULIC STEEL STRUCTURES Purpose This manual describes the inspection, evaluation, and repair of hydraulic steel structures, ... steel assembly composed of two channels and two 12-mm- (1/2-in.-) thick plates The use of a channel with upturned legs resulted in ponding of water that caused pitting and scaling corrosion of ... girder at the top and one at the bottom of the leaf The horizontal girders transmit the loads to the miter and quoin at the top of the leaf and into the sill at the bottom of the leaf Horizontally...
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Inspection Evaluation And Repair Of Steel structures Part 2 pot
Ngày tải lên :
05/08/2014, 11:20
... cooling of the weld material and HAZ promotes the formation of martensite, which is a brittle phase of steel Preheat and postheat requirements have been adopted (American National Standards Institute/American ... a function of chemical composition, thermomechanical history, and microstructure Chemical composition affects the toughness of a steel, since the addition of solute (e.g., alloying and/ or tramp ... cracking of a component The most important factors governing the fatigue life of structures are the severity of the stress concentration and the stress range of the cyclic loading The fatigue life of...
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Inspection Evaluation And Repair Of Steel structures Part 3 potx
Ngày tải lên :
05/08/2014, 11:20
... dam and control the release of water Sources of repeated loading include changes in load due to pool fluctuations, operation of the hydraulic steel structure, flow-induced vibration, and wind and ... the lock chamber water level and to opening and closing of gates The number of load cycles is a function of the number of lockages that occurs at the lock The number of load cycles due to gate ... of stress range blocks ni = number of cycles corresponding to Sri Sri = magnitude of a stress range block f Repeated loading for hydraulic steel structures The general function of hydraulic steel...
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Inspection Evaluation And Repair Of Steel structures Part 4 docx
Ngày tải lên :
05/08/2014, 11:20
... A588/A588M steel (a low-carbon weathering steel containing copper) and would corrode when coupled with A588/A588M steel There may also be a potential difference between rivet steel and the adjoining ... contact surfaces of the structure and seal, galvanic corrosion if the seal plate is of a dissimilar metal to that of the structure itself, or erosion corrosion if abrasive sand and silt particles ... members and connections and not just view them from a distance Inspectors should use various measuring scales, magnifying glasses, and other hand tools to identify, measure, and locate areas of concerns...
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Inspection Evaluation And Repair Of Steel structures Part 5 pot
Ngày tải lên :
05/08/2014, 11:20
... detectability and reliability of the inspection method, inspector qualifications, and economic considerations A summary of NDT methods that describes advantages and disadvantages of each is provided ... of inspection, inspection procedure, inspection equipment, inspector identity and qualifications, and a record of discontinuities detected that includes the location, size, orientation, and classification ... inspection, the type and extent of the deformation must be described accurately and in detail so that an assessment of the effect of the damage can be made The location of the damaged member...
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Inspection Evaluation And Repair Of Steel structures Part 6 docx
Ngày tải lên :
05/08/2014, 11:20
... the ductility and soundness of welded joints and to detect incomplete fusion, cracking, delamination, effect of bead configuration, and macrodefects of welded joints The quality of welds can be ... 0.2 percent offset yield strength and KIc is the plane strain fracture toughness of the material at the desired test temperature and loading rate The initial selection of a size of specimen may ... process of determining the capability of a structure to perform its intended function The evaluation includes the assessment of both the long- and short-term effects of all reported damage and unusual...
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Inspection Evaluation And Repair Of Steel structures Part 7 docx
Ngày tải lên :
05/08/2014, 11:20
... in Figures 6-8 through 6-16 (Barsom and Rolfe 1987) Barsom and Rolfe and Tada, Paris, and Irwin (1985) contain compilations of solutions for a wide variety of configurations c After the stress-intensity ... permission of PrenticeHall, Inc., Englewood Cliffs, NJ) where KT = theoretical stress concentration factor, aN = half of the long dimension of the ellipse, b = half of the short dimension of the ... copies of the standard can be obtained by post from BSI Publications, Linford Wood, Milton Keynes, MK14 6LE) Figure 6-7 Interaction of discontinuities with surfaces (Extracts from British Standards...
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Inspection Evaluation And Repair Of Steel structures Part 8 ppt
Ngày tải lên :
05/08/2014, 11:20
... Association of State Highway and Transportation Officials 1996; American Institute of Steel Construction 1994; EM 1110-2-2105) (5) Integrate the crack growth rate expression (i.e., Equations 6-8 and ... units, da/dN = 3.6 × 10-10 (∆KI)3 where a = in and ∆KI = ksi- in ) (2) Martensitic steels ASTM A514/A514M and ASTM A517/517M steels are martensitic steels: da/dN = 1.35 × 10-7 (∆KI)2.25 (6-9) where ... Relation between dimensions of a discontinuity and the parameter ā for embedded discontinuities (Extracts from British Standards Institution 1980 Complete copies of the standard can be obtained by...
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Inspection Evaluation And Repair Of Steel structures Part 9 pot
Ngày tải lên :
05/08/2014, 11:20
... structural integrity of the spillway gate must be evaluated (a) Since an evaluation of the local buckling of the strut arms was conducted when it was first observed and the amount of buckling on the ... and geometry of detail are known and the stress level and material fracture toughness have been estimated, the crack can be evaluated for fracture by calculating the stress intensity factor and ... factor of safety (FS), KIf , is given by a FS K If = 1.12σ π a FS • k b (7-7) where a = crack size k = function of a and b b = half-width of the plate (Tabulated values for k and stress...
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