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High Strength Iron Aluminide Alloys
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Book Synopsis High-strength Iron Aluminide Alloys by :
Download or read book High-strength Iron Aluminide Alloys written by and published by . This book was released on 1996 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: Past studies have shown that binary Fe3Al possesses low creep-rupture strength compared to many other alloys, with creep-rupture lives of less than 5 h being reported for tests conducted at 593°C and 207 MPa. The combination of poor creep resistance and low room-temperature tensile ductility due to a susceptibility to environmentally-induced dynamic hydrogen embrittlement has limited use of these alloys for structural applications despite their excellent corrosion properties. With regard to the ductility problem, alloy development efforts have produced significant improvements, with ductilities of 10-20% and tensile yield strengths as high as 500 MPa being reported. Likewise, initial improvements in creep resistance have been realized through small additions of Mo, Nb, and Zr.
Book Synopsis Iron Aluminide Alloys with Improved Properties for High Temperature Applications by :
Download or read book Iron Aluminide Alloys with Improved Properties for High Temperature Applications written by and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: An improved iron aluminide alloy of the DO.sub. 3 type that has increased room temperature ductility and improved high elevated temperature strength. The alloy system further is resistant to corrosive attack in the environments of advanced energy corrosion systems such as those using fossil fuels. The resultant alloy is relatively inexpensive as contrasted to nickel based and high nickel steels currently utilized for structural components. The alloy system consists essentially of 26-30 at. % aluminum, 0.5-10 at. % chromium, 0.02-0.3 at. % boron plus carbon, up to 2 at. % molybdenum, up to 1 at. % niobium, up to 0.5 at. % zirconium, up to 0.1 at. % yttrium, up to 0.5 at. % vanadium and the balance iron.
Download or read book Development of Iron Aluminides written by and published by . This book was released on 1995 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary reason for the poor room-temperature ductility of Fe3Al-based alloys is generally accepted to be environmental embrittlement due to hydrogen produced by the reaction of aluminum with water vapor present in the test atmosphere. In the as-cast condition, another possible reason for the low room-temperature ductility is the large grain size (0.5 to 3 mm) of the cast material. While recent studies on iron aluminides in the wrought condition have led to higher room-temperature ductility and increased high-temperature strength, limited studies have been conducted on iron aluminides in the as-cast condition. The purpose of this study was to induce grain refinement of the as-cast alloy through alloying additions to the melt and study the effect on room-temperature ductility as measured by the strain corresponding to the maximum stress obtained in a three-point bend test. A base charge of Fe-28% Al-5% Cr alloy was used; as in previous studies this ternary alloy exhibited the highest tensile ductility of several alloys tested. Iron aluminide alloys are being considered for many structural uses, especially for applications where their excellent corrosion resistance is needed. Several alloy compositions developed at ORNL have been licensed to commercial vendors for development of scale-up procedures. With the licensees and other vendors, several applications for iron aluminides are being pursued.
Book Synopsis ASM Specialty Handbook by : Joseph R. Davis
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.
Book Synopsis Physical Metallurgy and processing of Intermetallic Compounds by : N.S. Stoloff
Download or read book Physical Metallurgy and processing of Intermetallic Compounds written by N.S. Stoloff and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 690 pages. Available in PDF, EPUB and Kindle. Book excerpt: The attractive physical and mechanical properties of ordered intermetallic alloys have been recognized since early in this century. However, periodic attempts to develop intermetallics for structural applications were unsuc cessful, due in major part to the twin handicaps of inadequate low-temper ature ductility or toughness, together with poor elevated-temperature creep strength. The discovery, in 1979, by Aoki and Izumi in Japan that small additions of boron caused a dramatic improvement in the ductility of Ni3Al was a major factor in launching a new wave of fundamental and applied research on intermetallics. Another important factor was the issuance in 1984 of a National Materials Advisory Board reported entitled "Structural Uses for Ductile Ordered Alloys," which identified numerous potential defense-related applications and proposed the launching of a coordinated development program to gather engineering property and processing data. A substantial research effort on titanium aluminides was already underway at the Air Force Materials Laboratory at Wright Patterson Air Force Base in Ohio and, with Air Force support, at several industrial and university laboratories. Smaller programs also were under way at Oak Ridge National Laboratory, under Department of Energy sponsorship. These research efforts were soon augmented in the United States by funding from Department of Defense agencies such as Office of Naval Research and Air Force Office of Scientific Research, and by the National Science Foundation.
Book Synopsis Iron in Aluminium Alloys by : N.A. Belov
Download or read book Iron in Aluminium Alloys written by N.A. Belov and published by CRC Press. This book was released on 2002-02-07 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume discusses the phase composition and structure of iron-containing alloys, the influence of iron on various properties, the harmful effects of iron as an impurity. It considers the effect of iron on the structure and properties of aluminium alloys and defines ways to diminish this effect. The book also explores the use of iron in the development of new alloys and composites. It presents analyses of equilibrium and non-equilibrium phase diagrams and structure of iron-containing alloys to the development of new alloys and composite materials. Iron in Aluminium Alloys: Impurity and Alloying Element is intended for graduate students, engineers and researchers working in materials science and metallurgy.
Book Synopsis High Temperature Corrosion Behavior of Iron Aluminide Alloys and Coatings by :
Download or read book High Temperature Corrosion Behavior of Iron Aluminide Alloys and Coatings written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A multi-year effort has been focused on optimizing the long-term oxidation performance of ingot-processed (IP) and oxide-dispersion strengthened (ODS) Fe[sub 3]Al and iron aluminide-based coatings. Based on results from several composition iterations, a Hf-doped alloy (Fe-28Al-2Cr-0.05at.%Hf) has been developed with significantly better high temperature oxidation resistance than other iron aluminides. The scale adhesion is not significantly better; however, the[alpha]-Al[sub 2]O[sub 3] scale grows at a slower rate, approximately a factor of 10 less than undoped iron aluminide. The benefit of Hf is greatest at 1100-1200 C. Long-term oxidation resistance of commercially fabricated ODS Fe[sub 3]Al has been determined and compared to commercially available ODS FeCrAl. Scale spallation rates for ODS Fe[sub 3]Al are higher than for ODS FeCrAl. To complement studies of iron-aluminide weld-overlay coatings, carbon steel was coated with Fe-Al-Cr by thermal spraying. These specimens were then exposed in air at 900 and 1000 C and in air-1%SO[sub 2] at 800 C. Most likely due to an inadequate aluminum concentration in the coatings, continuous protective Al[sub 2]O[sub 3] could not be maintained and, consequently, the corrosion performance was significantly worse than what is normally observed for Fe[sub 3]Al.
Book Synopsis Iron in Aluminium Alloys by : N.A. Belov
Download or read book Iron in Aluminium Alloys written by N.A. Belov and published by CRC Press. This book was released on 2002-02-07 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume discusses the phase composition and structure of iron-containing alloys, the influence of iron on various properties, the harmful effects of iron as an impurity. It considers the effect of iron on the structure and properties of aluminium alloys and defines ways to diminish this effect. The book also explores the use of iron in the deve
Download or read book Aluminum written by John E. Hatch and published by ASM International. This book was released on 1984-01-01 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensive information for the American aluminium industry Collective effort of 53 recognized experts on aluminium and aluminium alloys Joint venture by world renowned authorities-the Aluminium Association Inc. and American Society for Metals. The completely updated source of information on aluminium industry as a whole rather than its individual contributors. this book is an opportunity to gain from The knowledge of the experts working for prestigious companies such as Alcoa, Reynolds Metals Co., Alcan International Ltd., Kaiser Aluminium & Chemical Corp., Martin Marietta Laboratories and Anaconda Aluminium Co. It took four years of diligent work to complete this comprehensive successor to the classic volume, Aluminium, published by ASM in 1967. Contents: Properties of Pure Aluminum Constitution of Alloys Microstructure of Alloys Work Hardening Recovery, Recrystalization and Growth Metallurgy of Heat Treatment and General Principles of Precipitation Hardening Effects of Alloying Elements and Impurities on Properties Corrosion Behaviour Properties of Commercial Casting Alloys Properties of Commercial Wrought Alloys Aluminum Powder and Powder Metallurgy Products.
Book Synopsis High-temperature Corrosion-resistant Iron-aluminide (FeAl) Alloys Exhibiting Improved Weldability by :
Download or read book High-temperature Corrosion-resistant Iron-aluminide (FeAl) Alloys Exhibiting Improved Weldability written by and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This invention relates to improved corrosion-resistant iron-aluminide intermetallic alloys. The alloys of this invention comprise, in atomic percent, from about 30% to about 40% aluminum alloyed with from about 0.1% to about 0.5% carbon, no more than about 0.04% boron such that the atomic weight ratio of boron to carbon in the alloy is in the range of from about 0.01:1 to about 0.08:1, from about 0.01 to about 3.5% of one or more transition metals selected from Group IVB, VB, and VIB elements and the balance iron wherein the alloy exhibits improved resistance to hot cracking during welding.
Book Synopsis Bureau of Mines Research by : United States. Bureau of Mines
Download or read book Bureau of Mines Research written by United States. Bureau of Mines and published by . This book was released on 1992 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Corrosion Resistant Iron Aluminides Exhibiting Improved Mechanical Properties and Corrosion Resistance by :
Download or read book Corrosion Resistant Iron Aluminides Exhibiting Improved Mechanical Properties and Corrosion Resistance written by and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The specification discloses a corrosion-resistant intermetallic alloy comprising, in atomic percent, an FeAl iron aluminide containing from about 30 to about 40% aluminum alloyed with from about 0.01 to 0.4% zirconium and from 0.01 to about 0.8% boron. The alloy exhibits considerably improved room temperature ductility for enhanced usefulness in structural applications. The high temperature strength and fabricability is improved by alloying with molybdenum, carbon, chromium and vanadium.
Book Synopsis Microstructures and Tensile Properties of As-cast Iron-aluminide Alloys by :
Download or read book Microstructures and Tensile Properties of As-cast Iron-aluminide Alloys written by and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis High-Performance Ferrous Alloys by : Radhakanta Rana
Download or read book High-Performance Ferrous Alloys written by Radhakanta Rana and published by Springer Nature. This book was released on 2020-12-18 with total page 673 pages. Available in PDF, EPUB and Kindle. Book excerpt: The current state of understanding of emerging iron alloys and high-alloy ferrous systems, in comparison with some conventional steels, is compiled in this single volume to further their development. While most of the conventional steels are produced routinely today, many advanced high strength steels and iron-based alloys are still in the laboratory stage. The iron-based emerging alloys can yield high levels of mechanical and physical properties due to their new alloy concepts and novel microstructures leading to multiple benefits of their use in terms of sustainability and environmental impact. This book contains introductory chapters that present the requisite background knowledge on thermodynamics, phase diagrams, and processing routes used for the ferrous alloys to enable the readers a smooth understanding of the main chapters. Then, an overview of the conventional microalloyed steels and advanced high strength steels is given to present the benchmark of the existing steels and ferrous alloys manifesting their current state-of-the-art in terms of physical metallurgy and engineering applications. Subsequent chapters detail novel, emerging ferrous alloys and high-alloy ferrous systems. Summarizes the state-of-the-art of emerging iron-based alloys and the new processing and physical metallurgy-related developments of high-alloy iron systems; Explores new iron-based systems driven by the need for new properties, enhanced performance, sustainable processes and educed environmental impact; Compiles cutting-edge research on the progress of materials science of iron-based systems, from physical metallurgy to engineering applications, and possible avenues for future research.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1994-11 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advanced Intermetallic-based Alloys by : Jörg Wiezorek
Download or read book Advanced Intermetallic-based Alloys written by Jörg Wiezorek and published by . This book was released on 2007 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Minerals & Materials written by and published by . This book was released on 1987 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
