Download or read book Environmental Effects on Iron Aluminide written by and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Environmental Effects on Iron Aluminides written by and published by . This book was released on 1993 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Corrosion properties of reference Fe3Al (28 at. % Al)-based compositions containing 2 and 5 at. % Cr were compared in a mixed gas composed of H2S-H2-H2O-Ar and in dehumidified air. The parabolic rate constant at 800C was a factor of 200 higher for the 5% Cr composition. Similar exposure of an alloy containing 16% Al and 5% Cr resulted in significantly higher weight gains than the Fe3Al -- 5% Cr composition. However all the alloys were significantly more resistant to the mixed gas than iron-based alloys with higher chromium and lower aluminum contents. The oxidation rates of the 2 and 5% Cr alloys were comparable in dry air at 800C and were a factor of two lower than the rate of the 2% Cr alloy in the mixed gas. An alloy of Fe with 16% Al, 5% Cr, and 0.1% Zr showed improved cyclic oxidation resistance in air at 900 and 1000C relative to binary alloys of 16 and 20% Al. The extent of oxidation of these 16% Al alloys was comparable to Zr-containing Fe3Al aluminides (28% Al) that develop adherent scales.
Download or read book ORNL 2 A written by and published by . This book was released on 1991 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: Alloys based on the Fe3Al system are under development at Oak Ridge National Laboratory (ORNL) in support of coal conversion and combustion materials requirements. Using H2S-H2-H2O gas mixtures, several experimental iron-aluminum alloys have been tested to assess the effects of aluminum concentration on corrosion behavior at 700 to 800°C in a simulated gasifier environment. Included in these studies are alloys that have been aluminized to convert the outer surfaces to FeAl (50 at. % Al). Thermogravimetric analyses, metallographic and chemical analyses of the corrosion product scales, are performed to determine the role of constituent metallic elements on oxidation and sulfidation processes. The corrosion resistance of Fe3Al alloys is being evaluated by exposures at 600 to 900°C in the gas-cooler section of an operating gasifier in the United Kingdom. The nature of protective scales formed on Fe3Al-based alloys in sulfur-containing atmospheres, as compared to air, is being evaluated using secondary ion mass spectroscopy (SIMS) and transmission electron microscopy (TEM). Marker experiments using 18O are conducted in conjunction with the SIMS studies to monitor oxide growth processes. 4 refs., 3 figs., 1 tab.
Download or read book Effects of Environment on the Mechanical Properties of Iron Aluminides written by Richard Lynch (J.) and published by . This book was released on 1992 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Environmental Effects on Engineered Materials written by Russell H. Jones and published by CRC Press. This book was released on 2001-03-29 with total page 499 pages. Available in PDF, EPUB and Kindle. Book excerpt: This invaluable reference provides a comprehensive overview of corrosion and environmental effects on metals, intermetallics, glossy metals, ceramics and composites of metals, and ceramics and polymer materials. It surveys numerous options for various applications involving environments and guidance in materials selection and substitution. Exploring a wide range of environments, including aqueous and high-temperature surroundings, Environmental Effects on Engineered Materials examines specific material-environmental interactions; corrosion rates and material limitations; preventive measurements against corrosion; utilization of older materials in recent applications; the use of new materials for existing equipment; and more.
Download or read book Processing Properties and Applications of Iron Aluminides written by Joachim H. Schneibel and published by Tms. This book was released on 1994-01-01 with total page 345 pages. Available in PDF, EPUB and Kindle. Book excerpt: While there are many publications dealing with intermetallic materials, this book is unique in that it focuses on one specific type of intermetallic, iron aluminides. 28 reviewed papers present recent significant advances in the general areas of processing, microstructure and mechanical behaviour, dislocations and defects, and environmental effects. It should be of interest to anyone involved with iron aluminide intermetallics.
Download or read book The Influence of Composition on Environmental Embrittlement of Iron Aluminides written by and published by . This book was released on 1996 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effects of water vapor in air and hydrogen gas on the tensile and fatigue crack growth behavior of Fe3Al alloys have been studied at room temperature. Fe-28a% Al-5a% Cr alloys to which either Zr alone or Zr and C have been added and tested in controlled humidity air environments as well as in 1.3 atm hydrogen or oxygen gas and in vacuum. As with other Fe3Al alloys, oxygen produces the lowest crack growth rates as well as the highest critical stress intensities and tensile ductility in each of the alloys tested. However, while Zr lowers crack growth rates in the Paris regime, there is no apparent beneficial effect on crack growth thresholds. Hydrogen gas also produces unusual results. While crack growth rates are very high in hydrogen in the Paris regime for all alloys, hydrogen only lowers the crack growth threshold relative to air in ternary Fe-28Al-5Cr; it does not lower the threshold in the Zr-containing alloys. It was found that decreased test frequency leads to increased crack growth rates in a Zr-containing alloy which points to a moisture-induced embrittlement mechanism responsible for the higher crack growth rates in air. Fracture path tends to be insensitive to environment for each alloy.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1995 with total page 782 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effect of Surface Condition on Aqueous Corrosion and Environmental Embrittlement of Iron Aluminides written by Robert L. Perrin and published by . This book was released on 1996 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Environmental Effects on Advanced Materials written by Russell H. Jones and published by . This book was released on 1991 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Materials Coordinating Committe EMaCC Fiscal Year 1997 Annual Technical Report written by and published by DIANE Publishing. This book was released on with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Encyclopedia and Handbook of Materials Parts and Finishes written by Mel Schwartz and published by CRC Press. This book was released on 2016-07-06 with total page 2660 pages. Available in PDF, EPUB and Kindle. Book excerpt: A great deal of progress has been made in the development of materials, their application to structures, and their adaptation to a variety of systems and integrated across a wide range of industrial applications. This encyclopedia serves the rapidly expanding demand for information on technological developments. In addition to providing information
Download or read book Encyclopedia of Materials Parts and Finishes Second Edition written by Mel Schwartz and published by CRC Press. This book was released on 2002-04-29 with total page 938 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the past two decades, higher processing temperatures, more efficient engines at higher temperatures, and the use of a vacuum environment have led to the development of a number of important processing, fabrication, and industrial techniques, resulting in new material forms including: matrix composites, nano- and functionally graded structures, plastics, smart piezoelectric materials, shape memory alloys, intermetallics, ceramics, and fullerenes. The second edition of this encyclopedia covers the new materials that have been invented or modified in recent years and updates information on basic materials as well. Encyclopedia of Materials, Parts, and Finishes, Second Edition brings together in one concise volume the most up-to-date information on materials, forms and parts, finishes, and processes utilized in the industry. There is not a handbook currently on the market that incorporates as much materials information in one volume. The coverage of materials usage extends from the breadth of military and aerospace materials to commercial (aircraft, automotive, electronics) and basic materials (wood, rubber, etc.). Each entry provides thorough, straightforward definitions along with examples of corresponding materials, parts, or finishes. Like its predecessor, this encyclopedia will be an invaluable reference that belongs on the desk of every materials scientist and engineer.
Download or read book Comprehensive Structural Integrity written by Ian Milne and published by Elsevier. This book was released on 2003-07-25 with total page 4647 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this major reference work is to provide a first point of entry to the literature for the researchers in any field relating to structural integrity in the form of a definitive research/reference tool which links the various sub-disciplines that comprise the whole of structural integrity. Special emphasis will be given to the interaction between mechanics and materials and structural integrity applications. Because of the interdisciplinary and applied nature of the work, it will be of interest to mechanical engineers and materials scientists from both academic and industrial backgrounds including bioengineering, interface engineering and nanotechnology. The scope of this work encompasses, but is not restricted to: fracture mechanics, fatigue, creep, materials, dynamics, environmental degradation, numerical methods, failure mechanisms and damage mechanics, interfacial fracture and nano-technology, structural analysis, surface behaviour and heart valves. The structures under consideration include: pressure vessels and piping, off-shore structures, gas installations and pipelines, chemical plants, aircraft, railways, bridges, plates and shells, electronic circuits, interfaces, nanotechnology, artificial organs, biomaterial prostheses, cast structures, mining... and more. Case studies will form an integral part of the work.
Download or read book Environmental Embrittlement of Iron Aluminides written by Richard J. Lynch and published by . This book was released on 1995 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ASM Specialty Handbook written by Joseph R. Davis and published by ASM International. This book was released on 1997-01-01 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt: Materials covered include carbon, alloy and stainless steels; alloy cast irons; high-alloy cast steels; superalloys; titanium and titanium alloys; refractory metals and alloys; nickel-chromium and nickel-thoria alloys; structural intermetallics; structural ceramics, cermets, and cemented carbides; and carbon-composites.
