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processing of aluminides

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Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004001
EISBN: 978-1-62708-185-6
... Abstract This article reviews the bulk deformation processes for various aluminide and silicide intermetallic alloys with emphasis on the gamma titanium aluminide alloys. It summarizes the understanding of microstructure evolution and fracture behavior during thermomechanical processing...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003164
EISBN: 978-1-62708-199-3
... melting points, and good high-temperature strength that make them an attractive material for high-temperature structural application. This article discusses the properties, chemical composition, corrosion resistance, processing, fabrication, alloying effects and crystallographic data of nickel aluminides...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001102
EISBN: 978-1-62708-162-7
... and metallurgical properties, material processing and fabrication, structural applications, mechanical behavior, environmental embrittlement, alloying effects, and crystal structure of aluminides of nickel, iron, titanium, and silicides. It describes the cleavage and intergranular fracture in trialuminides...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004000
EISBN: 978-1-62708-185-6
... can be forged and processed with appropriate TMP, albeit gamma aluminides are very, very difficult to fabricate by “conventional” titanium forging fabrication processes and usually require “special” processing techniques including isothermal forging based on powder metallurgy for manufacture...
Image
Published: 01 January 2005
Fig. 2 Portion of the binary titanium-aluminum phase diagram of interest in the processing of near-gamma and single-phase gamma titanium aluminide alloys. Source: Ref 46 More
Image
Published: 01 January 2005
Fig. 16 Flow charts for four processing scenarios for a near-gamma titanium aluminide hub-flange part. HIP, hot isostatic pressing. Source: Ref 98 More
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003555
EISBN: 978-1-62708-180-1
... Abstract High temperature corrosion may occur in numerous environments and is affected by factors such as temperature, alloy or protective coating composition, time, and gas composition. This article explains a number of potential degradation processes, namely, oxidation, carburization...
Book Chapter

Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001293
EISBN: 978-1-62708-170-2
... therefrom. These processes and coatings should find practical applications in the near future. Coating Protection and Degradation Simple aluminide coatings resist high-temperature oxidation by the formation of protective layers of alumina and can be used up to about 1150 °C (2100 °F). The coatings...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001313
EISBN: 978-1-62708-170-2
... for aircraft gas turbines. Coatings of aluminum-chromium-silicon, aluminum-silicon, and aluminum-tin systems are indicated in Table 5 . The aluminide coatings are applied as thick overlays, using a variety of spray or dip processes. The aluminide coatings provide good oxidation protection to molybdenum...
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003837
EISBN: 978-1-62708-183-2
... Abstract This article reviews the corrosion behavior of intermetallics for the modeling of the corrosion processes and for devising a strategy to create corrosion protective systems through alloy and coating design. Thermodynamic principles in the context of high-temperature corrosion...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003971
EISBN: 978-1-62708-185-6
... material and the titanium aluminide preform; by this means the flow stresses of the two components is similar, thereby promoting uniform co-extrusion. Secondary processing of parts has been most often conducted via isothermal closed-die forging ( Fig. 3a , b ). Careful can design and understanding...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003140
EISBN: 978-1-62708-199-3
..., or molybdenum. The orthorhombics typically contain 21 to 25 at.% Al and 25 to 30 at.% Nb. Aluminides, however, are difficult to process and fabricate into structural components because they have limited ductility and toughness at lower temperature ranges and therefore require very high processing...
Series: ASM Handbook
Volume: 4A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v04a.a0005775
EISBN: 978-1-62708-165-8
... process is used to improve the performance of steels in high-temperature corrosive environments. The complex aluminide intermetallic coatings formed during the process exhibit superior resistance to oxidation, carburization, and sulfidation. Table 2 provides a partial listing of commercial applications...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001101
EISBN: 978-1-62708-162-7
... 2 ). Research is being done to find methods for growing advanced single-crystal fibers and using refractory metal aluminides and silicides as matrices ( Ref 61 ). Key factors in selecting a reinforcement/matrix combination are chemical compatibility at the processing temperature and an approximate...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004158
EISBN: 978-1-62708-184-9
... on cobalt-base superalloys. Diffusion chrome coatings are also used. There are various processes used to make these coatings, including pack diffusion, chemical vapor deposition, and slurries. A micrograph of a nickel-aluminide coating is shown in Fig. 10 . The coating consists of the protective...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003151
EISBN: 978-1-62708-199-3
... oxidizing aerospace applications. This article discusses the properties, processing, applications, and classes of refractory metals and its alloys, namely molybdenum, tungsten, niobium, tantalum and rhenium. It also provides an outline of the coating processes used to improve their oxidation resistance...
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002473
EISBN: 978-1-62708-194-8
... are not as resistant as Cr 2 O 3 -formers. Because of the “overlay” coating process and the compositional similarity to the superalloy substrates, these coatings are much less susceptible to diffusional wearout than the aluminide conversion coatings. However, there is a reduced aluminum reservoir to sustain Al 2 O 3...
Series: ASM Handbook
Volume: 4E
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.hb.v04e.a0006283
EISBN: 978-1-62708-169-6
... Abstract This article provides a detailed discussion on heat treatment of titanium alloys such as alpha alloys, alpha-beta alloys, and beta and near-beta alloys. Common processes include stress-relief, annealing, solution treating, aging, quenching, and age hardening. It provides information...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001083
EISBN: 978-1-62708-162-7
... in titanium PA P/M technology. A demonstrator impeller made out of titanium aluminide PREP powder is shown in Fig. 16(e) . All of the above-mentioned PA parts were made by the Crucible ceramic mold process ( Ref 7 ). Future Trends in Titanium P/M Technology Clearly, sufficient data is now available...
Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002155
EISBN: 978-1-62708-188-7
... Abstract This article discusses the various categories of nontraditional machining processes that are subdivided according to the form of energy being harnessed. These include mechanical, electrical, thermal, and chemical methods. chemical methods electrical methods mechanical methods...