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superalloy-matrix composites

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280357
EISBN: 978-1-62708-267-9
..., and formation on the matrix composition from which the tcp is presumed to form. A plethora of PHACOMP systems existed by 1968 when the rst Seven Springs Symposium was held. This initial meeting of the now world-renowned event was known as the International Symposium on Structural Stability (in superalloys...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280025
EISBN: 978-1-62708-267-9
... strengths at the expense of reduced creep-rupture capability. The principal precipitate phase in superalloys is γ′. The γ′ phase is an ordered ( L 1 2 ) intermetallic fcc phase having the basic composition Ni 3 (Al, Ti). Alloying elements affect γ′ mismatch with the matrix phase, γ′ APB energy...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.sap.t53000025
EISBN: 978-1-62708-313-3
... Abstract The microstructure of superalloys is highly complex, with a large number of dispersed intermetallics and other phases that modify alloy behavior through their composition, morphology, and distribution. This chapter provides an overview of the most notable phases, including the matrix...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.sap.t53000009
EISBN: 978-1-62708-313-3
... elements in the composition, with the three base metals being nickel, cobalt, and iron. The entire superalloy family shares a common basic microstructure, which is a face-centered cubic (fcc) matrix with a number of dispersed secondary strengthening phases. In elemental form, nickel is the only superalloy...
Image
Published: 01 March 2002
Fig. 4.1 Freckles in IN-718 nickel-base superalloy billet forged from vacuum arc remelted ingot in which control of melt conditions was lost. Note: Composition of freckle vs. matrix was by microprobe and does not show carbon, which would be elevated in the freckles. Compositions More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240563
EISBN: 978-1-62708-251-8
... Abstract Superalloys are nickel, iron-nickel, and cobalt-base alloys designed for high-temperature applications, generally above 540 deg C. This chapter covers the metallurgy, composition, and properties of cast and wrought superalloys. It provides information on melting, heat treating...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2001
DOI: 10.31399/asm.tb.aub.t61170290
EISBN: 978-1-62708-297-6
... of microstructure and chromium content of nickel-base superalloys The γ′ phase is an ordered ( L 1 2 ) intermetallic fcc phase having the basic composition Ni 3 (Al,Ti). Alloying elements affect γ′ mismatch with the matrix γ phase, γ′ antiphase-domain-boundary (APB) energy, γ′ morphology, and γ′ stability...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2012
DOI: 10.31399/asm.tb.pdub.t53420339
EISBN: 978-1-62708-310-2
... that of the initial single-phase (parent) phase and the resultant product matrix. The matrix retains the same crystal structure as the initial one-phase parent but with a different equilibrium composition (α, β, or I) and usually a different lattice parameter than the parent phase. This general type of phase change...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120131
EISBN: 978-1-62708-269-3
... Abstract This chapter discusses some of the promising developments in the use of titanium, including titanium aluminides, titanium matrix composites, superplastic forming, spray forming, nanotechnology, and rapid solidification rate processing. It also reports on efforts to increase...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.sap.t53000059
EISBN: 978-1-62708-313-3
... Abstract This chapter discusses the typical compositional ranges of superalloys, the role of major base metals (iron, cobalt, and nickel), and the effects of common alloying additions. It describes how chromium, aluminum, and titanium as well as refractory elements, grain-boundary elements...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280117
EISBN: 978-1-62708-267-9
... Abstract Gas turbine disks made from nickel-base superalloys are often produced using powder metallurgy (P/M) techniques because the alloy compositions normally used are difficult or impractical to forge by conventional methods. This chapter discusses the P/M process and its application...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280287
EISBN: 978-1-62708-267-9
..., efforts in composition development have long passed the ternary nickel-chromium-aluminum system. Quinary (5-element) or higher superalloy compositions are the rule, with major additions of cobalt and refractory metallic elements playing a dominant role. As noted previously, 12 to 14 elements may...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060223
EISBN: 978-1-62708-343-0
... Abstract Fiber-reinforced metal-matrix composites have carved out a niche in applications requiring high strength to weight ratios, but they are susceptible to failure when exposed to high temperatures and cyclic loads. This chapter discusses the obstacles that must be overcome to improve...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.sap.t53000111
EISBN: 978-1-62708-313-3
... Abstract This chapter discusses the effect of composition on environmental resistance, machinability, and casting and forging, factors that are often considered when selecting a superalloy. environmental resistance materials selection superalloys THE EFFECT OF COMPOSITION...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.9781627082679
EISBN: 978-1-62708-267-9
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550457
EISBN: 978-1-62708-307-2
... Abstract Metal-matrix composites can operate at higher temperatures than their base metal counterparts and, unlike polymer-matrix composites, are nonflammable, do not outgas in a vacuum, and resist attack by solvents and fuels. They can also be tailored to provide greater strength...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280001
EISBN: 978-1-62708-267-9
..., and where they are typically used. It also includes nominal composition data for more than 120 superalloys and a concise overview of the major topics in the book. chemical composition superalloys How and When to Use This Chapter It is always difficult to locate concise but precise information...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280149
EISBN: 978-1-62708-267-9
... special preheat or postheat. Furthermore, interpass temperature control during welding normally is not critical. On the other hand, the defining characteristic of many iron-nickel- and nickel-base superalloys is the existence of a precipitate phase, which is dispersed in a matrix. The precipitation...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240135
EISBN: 978-1-62708-251-8
... be precipitation hardened. The iron- and nickel-base superalloys are another particularly important class of precipitation-hardening alloys. In the nickel-base superalloys, the precipitate Ni 3 (Al,Ti) has very little lattice misfit with the nickel matrix (< 2%), which produces very low strain energies (~10...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2012
DOI: 10.31399/asm.tb.pdub.t53420263
EISBN: 978-1-62708-310-2
... superalloys, such as γ′ solvus temperature, matrix (γ)/precipitate (γ′) misfit, and the formation of deleterious topologically close-packed (tcp) phases. In Example 3 , phase diagram calculation is applied to commercial titanium alloys. The β transus (temperature at which a starts to precipitate from β...