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Series: ASM Handbook
Volume: 1
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v01.a0001052
EISBN: 978-1-62708-161-0
... and reserves. The article presents a list of several superalloys that have been used in gas turbine engines or that are emerging as replacements because of the promise of increased operating temperatures and higher efficiencies for the aircraft of the future. It concentrates on the objectives, results...
Abstract
This article reviews some of the trends in superalloy development as they relate to U.S. strategic materials availability and the aerospace industry. It discusses the supply sources and availability of strategic materials and summarizes the status of U.S. resources and reserves. The article presents a list of several superalloys that have been used in gas turbine engines or that are emerging as replacements because of the promise of increased operating temperatures and higher efficiencies for the aircraft of the future. It concentrates on the objectives, results, and methodology of the NASA Conservation of Strategic Aerospace Materials (COSAM) program.
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002444
EISBN: 978-1-62708-194-8
...Abstract Abstract Computational fluid dynamics (CFD) is reserved for computationally intensive three-dimensional simulations of thermal fluids systems where nonlinear momentum transport plays an important role. This article presents the governing equations of fluid dynamics and an introduction...
Abstract
Computational fluid dynamics (CFD) is reserved for computationally intensive three-dimensional simulations of thermal fluids systems where nonlinear momentum transport plays an important role. This article presents the governing equations of fluid dynamics and an introduction to the CFD techniques for their solution. It introduces discretization techniques that are used by finite-difference, finite-volume, finite-element, spectral, and some particle methods. Associated concepts of numerical stability and accuracy are also reviewed. The article describes two approaches for grid generation with complex geometries: the use of unstructured grids and the use of special differencing methods on structured grids. The article describes the four-step procedures of the CFD process: geometry acquisition, grid generation and problem specification, flow solution, and post-processing and synthesis. It provides information on the applications of the engineering CFD. Issues and directions for the engineering CFD are also described.
Series: ASM Handbook
Volume: 4D
Publisher: ASM International
Published: 01 October 2014
DOI: 10.31399/asm.hb.v04d.a0005939
EISBN: 978-1-62708-168-9
... Reserve University, Cleveland, OH , Oct 22–23, 2007 11. Second Int. Symp. on Surface Hardening of Corrosion Resistant Alloys , Case Western Reserve University, Cleveland, OH , May 25–26, 2010 12. Nitriding Symposium 2 , Las Vegas, NV , Nov 18–19, 2010 13. Collins S...
Abstract
Low-temperature carburization hardens the surface of austenitic stainless steels through the diffusion of interstitial carbon without the formation of carbides. This article provides an overview on austenitic stainless steels and low-temperature carburization. It reviews the competing technologies and commercial application of low-temperature carburization. The article discusses several processing parameters, including activation of the surface, proper surface preparation, selection and condition of the alloy to be carburized, treatment temperature, and carburizing atmosphere for successful low-temperature carburization of austenitic stainless steels and other chromium-containing alloys. It describes the performance properties of the low-temperature carburized layer: fatigue resistance, wear resistance, erosion resistance, and corrosion resistance.
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005660
EISBN: 978-1-62708-198-6
Abstract
The biocompatibility of a material relates to its immunological response, toxicity profile, and ability to integrate with surrounding tissue without undesirable local or systemic effects on a patient. This article underscores the transformation of the medical device design ecosystem engaged as an integral part of the device ecosystem. It discusses the applications of biomaterials, including orthopedic, cardiovascular, ophthalmic, and dental applications. The article describes four major categories of biomaterials such as metals, polymers, glass and ceramics, and composites. A discussion on natural materials, nanomaterials, and stem cells is also provided. The article concludes with examples of biomaterials applications, such as endovascular devices, knee implants, and neurostimulation.
Book Chapter
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003707
EISBN: 978-1-62708-182-5
... onshore oil and gas reserves have been exploited. Oil production in the United States in 1998 consisted of 3.04 × 10 9 barrels. The significant recoverable reserves left to be discovered and produced are probably limited to less convenient locations, such as in deep water offshore, remote arctic...
Abstract
This article first describes the two methods used in the 1998 U.S. corrosion cost study. In the first method, the cost was determined by summing the costs for corrosion control methods and contract services. In the second, the cost of corrosion was first determined for specific industry sectors and then extrapolated to calculate a national total corrosion cost. The article then reports the results and conclusions of the study. It concludes with information on corrosion prevention strategies.
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004002
EISBN: 978-1-62708-185-6
Abstract
Discontinuously reinforced aluminum (DRA) alloy metal-matrix composites (MMCs) represent an advanced aluminum materials concept whereby ceramic particles, or whiskers, are added to aluminum-base alloys through the use of either ingot-melting or casting and/or powder-metallurgy (P/M) techniques. This article begins with a summary of general observations on the forging of discontinuously reinforced composites. It provides information on some of the specific experimental results obtained on various DRA systems, including 2xxx DRA alloys and cast DRA alloys. The article reviews the efforts on the modeling of behavior of specific alloy systems, with a comparison of experimental results to the modeling attempts. It concludes with information on the properties of deformation-processed DRA alloys.
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004007
EISBN: 978-1-62708-185-6
... Reserve Univ. , 1998 53. Embury J.D. , Newell J. , and Tao S. , Proc. 12th Risø International Symposium on Materials Science , Sept 2–6, 1991 , Risø National Laboratory, Roskilde, Denmark, 1991 , p 317 54. Lewandowski J.J. , Berger B. , Rigney J.D...
Abstract
This article begins with a general review of the effects of changes in stress state on processing of materials. It describes the fundamentals of hydrostatic extrusion and reviews the various issues and benefits associated with hydrostatic extrusion. The article discusses the hydrostatic extrusion of structural alloys, composites, brittle materials, and intermetallics or intermetallic compounds, with examples. It concludes with a discussion on the attempts made to extend the hydrostatic extrusion to higher temperatures.
Book: Fatigue and Fracture
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002414
EISBN: 978-1-62708-193-1
... Composites , Masenauve J. and Hamel F.G. , Ed., ASM International , 1990 , p 209 50. Manoharan M. and Lewandowski J.J. , unpublished research, Case Western Reserve University , 1988 51. Geiger A.L. and Walker J.A. , JOM , Vol 43 ( No. 8 ), 1991 , p 8...
Abstract
This article reviews the tensile properties and toughness characteristics of discontinuously reinforced aluminum (DRA) composites in terms of particle spacing, particle size, volume fraction, matrix alloy, and matrix microstructure. Both fracture toughness data and impact toughness data of the DRA composites are summarized. The article discusses the effects of confining pressure on the ductility of the DRA materials. It describes the fatigue behavior, such as stress-life behavior, strain-life behavior, and fatigue crack propagation, of the DRA.
Book Chapter
Book: Fractography
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000630
EISBN: 978-1-62708-181-8
... plane to the other. SEM, 300× (A.S. Moet, Case Western Reserve University) Fig. 1318, 1319 Crack-growth mechanisms in three-point bending of notched 0.4-mm (16-mil) thick specimens of linear polyethylene (density = 0.964 g/cm 3 ). The notch, made by a razor blade, was held open during observation...
Abstract
This article is an atlas of fractographs that helps in understanding the causes and mechanisms of fracture of polymers, including polycarbonate, polyethylene, and polyimide, and in identifying and interpreting the morphology of fracture surfaces. The fractographs illustrate the quasi-brittle fatigue crack propagation, brittle and ductile fracture, crack-growth mechanisms, tearing, fibrillation, and fatigue striations of these surfaces.
Series: ASM Handbook
Volume: 3
Publisher: ASM International
Published: 27 April 2016
DOI: 10.31399/asm.hb.v03.9781627081634
EISBN: 978-1-62708-163-4
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001091
EISBN: 978-1-62708-162-7
..., 70 to 80 ppm, are found in India, Suriname, and the United States. Figure 2 shows an estimate of the world gallium reserves available from bauxite, based on bauxite reserves, and the average gallium content of the bauxite in each country ( Ref 5 ). Fig. 2 World gallium reserves in bauxite...
Abstract
Gallium-base components can be found in a variety of products ranging from compact disk players to advanced military electronic warfare systems, owing to the factor that it can emit light, has a greater resistance to radiation and operates at faster speeds and higher temperatures. This article discusses the uses of gallium in optoelectronic devices and integrated circuits and applications of gallium. The article discusses the properties and grades of gallium arsenide and also provides information on resources of gallium. The article talks about the recovery techniques, including recovery from bauxite, zinc ore and secondary recovery process and purification. The article briefly describes the fabrication process of gallium arsenide crystals. Furthermore, the article gives a short note on world supply and demand of gallium and concludes with research and development on gallium arsenide integrated circuits.
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003223
EISBN: 978-1-62708-199-3
... quantitatively or qualitative characterizes the effects the environmental burdens identified in the inventory stage have on local and global environments. Specifically, the magnitude of the effects on ecological and human health and on resource reserves are determined. Impact analysis is, at this time...
Abstract
Product design greatly influences the recycling and reuse of manufacturing materials. This article presents a design for recycling strategy based on ease of disassembly, minimizing process scrap, using readily recyclable materials, and labelling or otherwise identifying parts. It also discusses the concept of life-cycle analysis (LCA), a quantitative accounting of the environmental and economic costs of using a given material and the energy required to make, distribute, operate, and eventually dispose of the host product and its constituent materials. An important but often overlooked step in the LCA process is to identify potential improvement pathways.
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001090
EISBN: 978-1-62708-162-7
... Inorganic Compounds Organogermanium Compounds Ore Processing Purification Use as a Semiconductor Use in Infrared Optics Environmental Impact World reserves of germanium have been estimated at 4000 Mg (4400 tons), but it is impossible to discuss reserves without considering price...
Abstract
Germanium is a semiconducting metalloid element found in Group IV A. Germanium is used in the field of electronics, infrared optics, and in the fields of gamma ray spectroscopy, catalysis, and fiber optics. This article discusses the sources, manufacturing, and processing of germanium, and focuses on the chemical properties of various germanium compounds, including germanium halides, germanates, germanides, germanes, inorganic, and organogermanium compounds. It also tabulates the physical, thermal, electronic, and optical properties of germanium, and explains the economical aspects and specifications of germanium. The article describes the analytical and test methods of germanium, including gravimetric method, titrimetric method, and spectral method. It provides a short note on toxicology, and concludes with the uses of germanium in different fields.
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002483
EISBN: 978-1-62708-194-8
... miles with maximum payload 3. Reserves 25% of mission fuel 4. Cruise speed 250 knots at 75% power at 10,000 ft and at takeoff weight 5. Climb 10 min to 10,000 ft at takeoff weight 6. Takeoff and landing 1500 ft ground fun at sea level, standard day. Landing at 0.95 of takeoff weight 7...
Abstract
This article focuses on products defined by dimensions and tolerances and fabricated by some manufacturing process. It describes the general concepts associated with cost estimation. These include domain limitation, database commonality, cost allocation, and elements of cost. The article discusses three methods of cost estimation, namely, parametric methods, empirical methods, and complexity theory, with examples. It concludes with recommendations for cost estimation.
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005527
EISBN: 978-1-62708-197-9
... airplane Table 1 Mission specification for a twin-engine, propeller-driven airplane 1. Payload Six passengers at 175 lb each (including the pilot) and 200 lb total baggage 2. Range 1000 statute miles with maximum payload 3. Reserves 25% of mission fuel 4. Cruise speed 250 knots at 75...
Abstract
This article focuses on the products defined by dimensions and tolerances, made from solid materials, and fabricated by some manufacturing process. It describes three methods of cost estimations: parametric methods, empirical methods, and the complexity theory. The article presents an example to illustrate the parametric cost estimation of aircraft. An example to illustrate the cost estimation of sheet metal and riveted parts is also provided.
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001065
EISBN: 978-1-62708-162-7
Abstract
Copper and copper alloys constitute one of the major groups of commercial metals due to their excellent electrical and thermal conductivities, corrosion and fatigue resistance, ease of fabrication, and good strength. This article lists the types, properties, fabrication characteristics, corrosion ratings, temper designations, and applications of wrought copper and copper alloys. It also presents an outline of the most commonly used mechanical working and heat treating processes. The copper industry in the United States is broadly composed of two segments: producers (mining, smelting, and refining companies) and fabricators (wire mills, brass mills, foundries, and powder plants). The article discusses copper production methods and describes major changes in the structure of the U.S. copper and copper alloys industry.
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001086
EISBN: 978-1-62708-162-7
... of beryllium for the subsequent extraction process ( Fig. 2 ), although Brush Wellman processes both bertrandite ore and beryl at its extraction facility in Delta, UT. The beryl is purchased from foreign sources as a means of husbanding the available domestic reserves of beryllium-containing ore. The mine...
Abstract
Beryllium is a metal with an unusual combination of physical and mechanical properties that make it particularly effective in optical components, precision instruments, and specialized aerospace applications. Almost all of the beryllium in use is a powder metallurgy (P/M) product. Beginning with an overview of the mining and refining processes of beryllium, this article discusses powder production and consolidation methods, beryllium grades and their designations, and the protective measures that have been enacted to reduce exposure to beryllium.
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006550
EISBN: 978-1-62708-290-7
... Components. J Am Ceram Soc., Wiley Online Library; 2013; 96: 1124–1130, https://doi.org/10.1111/jace.12285 , by permission from Wiley. Copyright © 2019 The American Ceramic Society, all rights reserved. (b) A rotating disk nearly 43 mm in diameter. Source: Ref 7 , https://doi.org/10.1016/j.addma...
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.9781627081832
EISBN: 978-1-62708-183-2
Book Chapter
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005113
EISBN: 978-1-62708-186-3
... in a hydraulic press brake showing adjustable piston travel Increasing the pressure of the oil increases the tonnage available on the ram, and hydraulic manufacturers normally build in approximately 10 to 15% reserve as an overload safety feature. However, manufacturers generally do not promote...
Abstract
Press brakes are a common and versatile type of equipment for bending metal by delivering an accurate vertical force in a confined longitudinal area. This article begins with a discussion on the design, widening methods, and types of materials used in press brakes. It focuses on the two basic drive systems used in operating press brakes, namely, mechanical and hydraulic drive systems. The article also provides an outline on the tooling associated with press-brakes.