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Surface energy balance for the liquid metal/solid silica system. γ, surface...
Available to PurchasePublished: 31 August 2017
Fig. 7 Surface energy balance for the liquid metal/solid silica system. γ, surface energy; θ, solid/liquid contact angle; SL, solid/liquid; LV, liquid/vapor; SV, solid/vapor
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Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003610
EISBN: 978-1-62708-182-5
... Abstract This article provides information on the liquid lithium systems that are exposed to liquid metal. It discusses the forms in which liquid-metal corrosion is manifested. The influence of several key factors on the corrosion of metals and alloys by liquid-metal systems or liquid-vapor...
Abstract
This article provides information on the liquid lithium systems that are exposed to liquid metal. It discusses the forms in which liquid-metal corrosion is manifested. The influence of several key factors on the corrosion of metals and alloys by liquid-metal systems or liquid-vapor metal coolants is described. Some information on safety precautions for handling liquid metals, operating circulating systems, dealing with fire and spillage, and cleaning contaminated components, are also provided.
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003594
EISBN: 978-1-62708-182-5
.... It also provides guidelines for materials selection and alloy development based on liquid metal corrosion reactions. corrosion reactions liquid metal corrosion liquid metal environment liquid metal systems material selection CONCERN ABOUT CORROSION of solids exposed to liquid metal...
Abstract
This article examines a type of corrosion that occurs when solids (primarily metals) are exposed to liquid metal environments. It describes the principle mechanisms of liquid metal corrosion, including dissolution, impurity and interstitial reactions, alloying, and compound reduction. It also provides guidelines for materials selection and alloy development based on liquid metal corrosion reactions.
Book Chapter
Liquid-Metal- and Solid-Metal-Induced Embrittlement
Available to PurchaseSeries: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006786
EISBN: 978-1-62708-295-2
... reviews some commercial alloy systems in which liquid-metal-induced embrittlement or solid-metal-induced embrittlement has been documented and describes some examples of cracking due to these phenomena, either in manufacturing or in service. commercial alloy systems failure analysis liquid-metal...
Abstract
Metal-induced embrittlement is a phenomenon in which the ductility or the fracture stress of a solid metal is reduced by surface contact with another metal in either the liquid or solid form. This article summarizes some of the characteristics of liquid-metal- and solid-metal-induced embrittlement. This phenomenon shares many of these characteristics with other modes of environmentally induced cracking, such as hydrogen embrittlement and stress-corrosion cracking. The discussion covers the occurrence, failure analysis, and service failures of the embrittlement. The article also briefly reviews some commercial alloy systems in which liquid-metal-induced embrittlement or solid-metal-induced embrittlement has been documented and describes some examples of cracking due to these phenomena, either in manufacturing or in service.
Book Chapter
Liquid Metal and Solid Metal Induced Embrittlement
Available to PurchaseSeries: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003554
EISBN: 978-1-62708-180-1
... Abstract Metal-induced embrittlement is a phenomenon in which the ductility or fracture stress of a solid metal is reduced by surface contact with another metal in either liquid or solid form. This article summarizes the characteristics of solid metal induced embrittlement (SMIE) and liquid...
Abstract
Metal-induced embrittlement is a phenomenon in which the ductility or fracture stress of a solid metal is reduced by surface contact with another metal in either liquid or solid form. This article summarizes the characteristics of solid metal induced embrittlement (SMIE) and liquid metal induced embrittlement (LMIE). It describes the unique features that assist in arriving at a clear conclusion whether SMIE or LMIE is the most probable cause of the problem. The article briefly reviews some commercial alloy systems where LMIE or SMIE has been documented. It also provides some examples of cracking due to these phenomena, either in manufacturing or in service.
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006303
EISBN: 978-1-62708-179-5
... for all varieties of cast iron and all varieties of molds. It discusses the general conditions for the filling system layout, including the downsprue, sprue/runner junction, and runner. Both gray cast iron and compacted graphite iron exhibit a growth of graphite in direct contact with the liquid metal...
Abstract
Gray cast iron is one of the most tolerant of metals when used with poorly designed filling systems. Good filling systems are necessary for the production of sound and acceptable ductile iron castings. This article presents an outline description of well-designed filling systems for all varieties of cast iron and all varieties of molds. It discusses the general conditions for the filling system layout, including the downsprue, sprue/runner junction, and runner. Both gray cast iron and compacted graphite iron exhibit a growth of graphite in direct contact with the liquid metal. The article concludes with a discussion on feeding of ductile iron.
Book Chapter
Gating Design
Available to PurchaseBook: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0009017
EISBN: 978-1-62708-187-0
... Abstract A gating system is the conduit network through which liquid metal enters a mold and flows to fill the mold cavity, where the metal can then solidify to form the desired casting shape. This article discusses various desirable design considerations for the gating system. Proper design...
Abstract
A gating system is the conduit network through which liquid metal enters a mold and flows to fill the mold cavity, where the metal can then solidify to form the desired casting shape. This article discusses various desirable design considerations for the gating system. Proper design of an optimized gating system will be made easier by the application of several fundamental principles of fluid flow. The article illustrates the Bernoulli's theorem, the law of continuity, and the effect of momentum. Most casting alloys are subject to the presence of particles that can deleteriously affect the physical properties and appearance of the casting. The article lists a variety of adverse effects of the particles. Ceramic filters, when correctly applied, can be relied on to trap particles before they can enter the casting cavity. The article concludes with information on the advantages and the types of the ceramic filters.
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004113
EISBN: 978-1-62708-184-9
... the tank is in contact with the soil. This article describes the soil characteristics and addresses cathodic protection (CP) criteria for submerged metallic piping systems. It provides information on the data required for designing a CP system, alone or in conjunction with a protective coating system...
Abstract
Steel storage tanks are the primary means for storing large volumes of liquids and gaseous products. The stored fluid could be water, but it could also be volatile, corrosive, and flammable fluid requiring special precautions for storage as well. Corrosion is generally worst where the tank is in contact with the soil. This article describes the soil characteristics and addresses cathodic protection (CP) criteria for submerged metallic piping systems. It provides information on the data required for designing a CP system, alone or in conjunction with a protective coating system. These data are collected from predesign site assessments, tank electrical characteristics, and soil-resistivity measurements. The article addresses NACE Standard RP0169, which gives requirements and desired characteristics for coating in conjunction with CP. It also explains the methods of protecting aboveground storage tanks and underground storage tanks.
Book Chapter
Riser Design
Available to PurchaseBook: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0009016
EISBN: 978-1-62708-187-0
... of feeding systems used in riser design: riser sleeves, topping compounds, and breaker cores. metal contamination riser design feed metal volume riser location liquid feed metal duration riser sleeves topping compounds breaker cores riser size riser necks RISER DESIGN, or risering, deals...
Abstract
The role of an engineer in designing risers is to make sure that risers provide the feed metal in the right amount, at the right place, and at the right time. This article addresses feed metal volume, riser location, and duration of liquid feed metal. It discusses the three types of feeding systems used in riser design: riser sleeves, topping compounds, and breaker cores.
Book Chapter
Molding and Casting Processes
Available to PurchaseSeries: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006297
EISBN: 978-1-62708-179-5
... been proven that sand inclusions are uniquely the problem of poor design of the filling system, entraining air bubbles in the liquid metal. The greatest danger of excess water is probably the creation of blow defects, in which steam bubbles are forced into the liquid metal because the steam cannot...
Abstract
Aggregate molding, or sand casting, is the gravity pouring of liquid metal into a mold that is made of a mixture molded against a permanent pattern. This article summarizes the most important materials in the process of sand casting of cast iron, including different types of molding aggregates, clays, water, and additives in green sand, chemically bonded organic resins, and inorganic binders in self-setting, thermosetting, and gas-triggered systems. It discusses three main types of reclamation systems: wet, dry, and thermal. The article concludes with a description of both nonpermanent and permanent mold processes.
Book Chapter
Metal-Matrix Composites
Available to PurchaseSeries: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003163
EISBN: 978-1-62708-199-3
... conditions exist, the liquid metal will spontaneously infiltrate into the preform. Key process ingredients for the manufacture of reinforced aluminum composites include the aluminum alloy, a nitrogen atmosphere, and magnesium present in the system. During heating to infiltration temperature (∼750 °C...
Abstract
Metal-matrix composites (MMCs) are a class of materials with potential for a wide variety of structural and thermal applications. This article discusses the mechanical properties of MMCs, namely aluminum-matrix composites, titanium-matrix composites, magnesium-matrix composites, copper-matrix composites, superalloy-matrix composites, and intermetallic-matrix composites. It describes the processing methods of discontinuous aluminum MMCs which include casting processes, liquid-metal infiltration, spray deposition and powder metallurgy. The article provides useful information on aluminum MMC designation system and also describes the types of continuous fiber aluminum MMCs, including aluminum/boron MMC, aluminum/silicon carbide MMC, aluminum/graphite MMC, and aluminum/alumina MMC.
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006490
EISBN: 978-1-62708-207-5
... Abstract Although laser stir welding (LSW) is applied to various metallic systems, it is especially appropriate to laser beam welding (LBW) of aluminum, because liquid aluminum possesses significantly less surface tension and viscosity than most common metal alloys, which results in greater...
Abstract
Although laser stir welding (LSW) is applied to various metallic systems, it is especially appropriate to laser beam welding (LBW) of aluminum, because liquid aluminum possesses significantly less surface tension and viscosity than most common metal alloys, which results in greater fluidity of the molten pool. This article schematically illustrates the keyhole instability in LBW and describes the process details of LSW. Representative macrographs of butt, lap, and fillet welds produced using the LBW and LSW processes are presented. The article discusses the laser welding technologies having a large impact on the ability to apply LSW in production. It concludes with information on the industrial applications of LSW.
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006369
EISBN: 978-1-62708-192-4
... methods of lubrication. It provides a discussion on the solid materials that have been most commonly used as lubricants: carbon-base materials, transition metal dichalcogenides, polymers, and soft metals. lubrication mechanical systems liquid lubricants greases carbon-base material transition...
Abstract
Strategies for the lubrication of mechanical systems operating in extreme environments must exclude the liquid lubricants and greases and rely on alternative methods of lubrication, such as gases and solids. This article provides a survey of some of the more effective alternative methods of lubrication. It provides a discussion on the solid materials that have been most commonly used as lubricants: carbon-base materials, transition metal dichalcogenides, polymers, and soft metals.
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005189
EISBN: 978-1-62708-187-0
... of thermodynamics and kinetics is time. The less time available for a process, the more likely that kinetics will govern the chemical state of the system. The thermodynamics and kinetics are fundamental in the composition control of liquid metal. Composition control consists of two areas: alloy addition...
Abstract
This article introduces the fundamental concepts of chemical thermodynamics and chemical kinetics in describing presolidification phenomena. For metallurgical systems, the most important thermodynamic variables are enthalpy and Gibbs free energy. A qualitative demonstration of the interrelationship between phase diagrams and thermodynamics is presented. The article discusses processes that generally limit the rates of chemical processes. These include nucleation of the product phase and interphase mass transport. The article provides a discussion on the dissolution of alloy with melting point lower than bath temperature and dissolution of alloy that is solid at bath temperatures.
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003171
EISBN: 978-1-62708-199-3
... system imperfections metals risering system solidification SOLIDIFICATION is the transformation of liquid to solid. During this process, atoms change their arrangement from randomized short-range order to regular positions on a crystallographic lattice. In doing so, they give up energy...
Abstract
Solidification is a comprehensive process of transformation of the melt of metals and alloys into a solid piece, involving formation of dendrites, segregation which involves change in composition, zone formation in final structure of the casting, and microporosity formation during shrinkage. This article describes the imperfections in the solidification process including porosity, inclusions, oxide films, secondary phases, hot tears, and metal penetration. It talks about the purpose of the gating system and the risering system in the casting process.
Book Chapter
Infiltration of Carbide Structures
Available to PurchaseBook: Powder Metallurgy
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006099
EISBN: 978-1-62708-175-7
... applying external pressure via liquid metal, which penetrates the pore structure of a PM component ( Ref 1 , 2 , 3 , 4 , 5 , 6 , 6 , 7 ). The process is similar to liquid-phase sintering, where a component in the materials system melts and fills pore space. This can lead to particle rearrangement...
Abstract
This article provides information on the infiltration mechanism of carbide structures. It reviews the basic techniques used for metal infiltration, including dip infiltration, contact filtration, gravity feed infiltration, and external-pressure infiltration. The article highlights various applications of contact infiltration in oil, gas, and blast-hole drilling such as fixed-cutter drill bits and diamond-impregnated coring bits. It also discusses the applications of infiltrated carbide material in erosion-resistant cladding.
Book Chapter
Modeling of Transport Phenomena during Solidification Processes
Available to PurchaseSeries: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005525
EISBN: 978-1-62708-197-9
... element on the diffusion of another, are not well documented for most liquid metal systems. Fortunately, the assumption to neglect the interdiffusion effect is justified by a scaling analysis ( Ref 13 ) showing that advection dominates species transport on the macroscopic level throughout the process...
Abstract
This article presents conservation equations for heat, species, mass, and momentum to predict transport phenomena during solidification processing. It presents transport equations and several examples of their applications to illustrate the physics present in alloy solidification. The examples demonstrate the utility of scaling analysis to explain the fundamental physics in a process and to demonstrate the limitations of simplifying assumptions. The article concludes with information on the solidification behavior of alloys as predicted by full numerical solutions of the transport equations.
Book Chapter
Casting Practice: Guidelines for Effective Production of Reliable Castings
Available to PurchaseBook: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005277
EISBN: 978-1-62708-187-0
... that the liquid metal front (the meniscus) should not go too fast. Maximum meniscus velocity is in the range of 0.4 to 0.6 m/s (1.3 to 2.0 ft/s) for most liquid metals. This maximum velocity may be raised in constrained running systems or thin-section castings. This requirement also implies that the liquid metal...
Abstract
This article provides a discussion on ten rules for the effective production of reliable castings. These rules include good-quality melt, liquid front damage, liquid front stop, bubble damage, core blows, shrinkage damage, convection damage, segregation, residual stress, and location points.
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005211
EISBN: 978-1-62708-187-0
... to evolve from the liquid at temperature T E in Fig. 2 , there must be a nucleation event and subsequent growth of the solid phases to form the final solidified eutectic structure. From studies of over 60 binary metallic eutectic systems containing solid solutions α and β ( Ref 1 , 2 , 3 , 4...
Abstract
This article presents the binary eutectic phase diagram to understand the various structures that evolve in a binary eutectic system during solidification. It describes the various classifications and solidification principles of the eutectic structures. The formation of halos in eutectic microstructures of most alloy systems is also discussed.
Book Chapter
Peritectic Alloy Systems
Available to PurchaseBook: Alloy Phase Diagrams
Series: ASM Handbook
Volume: 3
Publisher: ASM International
Published: 27 April 2016
DOI: 10.31399/asm.hb.v03.a0006226
EISBN: 978-1-62708-163-4
... the melt. Nucleation-Controlled Peritectic Structures The classical description of peritectic reactions postulates heterogeneous nucleation of β at the α-liquid interface at the peritectic equilibrium temperature, T p . Undercoolings of up to 4% of T p are required for the systems investigated...
Abstract
Similar to the eutectic group of invariant transformations is a group of peritectic reactions, in which a liquid and solid phase decomposes into a solid phase on cooling through the peritectic isotherm. This article describes the equilibrium freezing and nonequilibrium freezing of peritectic alloys. It informs that peritectic reactions or transformations are very common in the solidification of metals. The article discusses the formation of peritectic structures that can occur by three mechanisms: peritectic reaction, peritectic transformation, and direct precipitation of beta from the melt. It provides a discussion on the peritectic structures in iron-base alloys and concludes with information on multicomponent systems.
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