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iron-base superalloys

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.sap.t53000009
EISBN: 978-1-62708-313-3
... Abstract This chapter provides a brief overview of nickel-iron-base, cobalt-base, and nickel-base superalloys, discussing their basic metallurgy and defining characteristics. coefficient of thermal expansion superalloys SUPERALLOYS ARE CLASSIFIED according to the main alloying...
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...
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
... Abstract This article discusses the composition, structure, and properties of iron-nickel-, nickel-, and cobalt-base superalloys and the effect of major alloying and trace elements. It describes the primary and secondary roles of each alloying element, the amounts typically used...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.sap.t53000001
EISBN: 978-1-62708-313-3
... Abstract Superalloys, although not strictly defined, are generally regarded as high-performance alloys based on group VIII elements (nickel, cobalt, or iron, with a high percentage of nickel) to which a multiplicity of alloying elements have been added. The defining feature of a superalloy...
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...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280025
EISBN: 978-1-62708-267-9
... prime gamma prime microstructure superalloys As noted earlier, there are three groups of superalloys (iron-nickel-, nickel-, and cobalt-base), which are further subdivided into cast and wrought (where...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820125
EISBN: 978-1-62708-339-3
...: This element is an ideal base because it not only possesses moderate corrosion resistance by itself, but it also can be alloyed with significant quantities of copper, molybdenum, chromium, iron, and tungsten, while retaining its ductile fcc structure. Some inherent properties imparted by nickel to its alloys...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280011
EISBN: 978-1-62708-267-9
... Abstract This chapter provides basic materials selection information for iron-nickel-, nickel-, and cobalt-base superalloys. It discusses mechanical and physical properties, the effect of service temperature, and the comparative strengths of wrought and cast product forms. It includes several...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.mgppis.t60400001
EISBN: 978-1-62708-258-7
... the low-alloy steels as well as the high-alloy stainless steels, tool steels, and iron-base superalloys. In other words, it depends on the elevated-temperature range and the application. At the lower temperatures, the low-alloy steels are adequate, whereas at higher temperatures, the higher-alloy steels...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.sap.t53000025
EISBN: 978-1-62708-313-3
..., and shape. Carbides are present in all superalloy families and tend to locate at grain boundaries, especially in nickel-base superalloys. However, in cobalt- and nickel-iron-base superalloys, intragranular carbides are commonly observed. In general, carbides provide a beneficial effect on rupture 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
... developed in the first decade of the 20th century) were also available. So, the race was on to make superior metal alloys available for the insatiable thirst of the designer for more high-temperature strength capability. It continues yet! Superalloys are nickel-, iron-nickel-, and cobalt-base alloys...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280079
EISBN: 978-1-62708-267-9
...). CG and SC parts are being cast regularly in lower weights with some as large as 10 to 20 lb (4.5 to 9.0 kg). Cobalt-base and high V f γ′ nickel-base superalloys plus IN-718 γ″-hardened nickel-iron-base superalloys are processed to complex final shapes by investment casting. Iron-nickel-base...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120001
EISBN: 978-1-62708-269-3
... be comparable to that of lower-strength martensitic stainless and is better than that of austenitic or ferritic stainless. Alloys can have ultimate strengths comparable to iron-base superalloys, such as A286, or cobalt-base alloys, such as L605. The commercial alloys of titanium are useful at temperatures...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280091
EISBN: 978-1-62708-267-9
... concepts based on wrought alloys with good fabricability and ductility. Early wrought superalloys were customarily the alloys of iron-nickel- or nickel-base. Thus, where possible (especially for design-critical applications), these alloys tended to be the alloys of choice, not cobalt-base alloys...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2001
DOI: 10.31399/asm.tb.aub.t61170540
EISBN: 978-1-62708-297-6
... the wear resistant, corrosion resistant, and heat resistant cobalt-base alloys, the use of cobalt in nickel-base superalloys (the largest end-use sector for cobalt), iron-base superalloys, cemented carbides, magnetic materials, low-expansion alloys, steels, and, to a lesser extent, nonferrous alloys...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280211
EISBN: 978-1-62708-267-9
... Cobalt-base superalloys are solid-solution strengthened, although a few older alloys were γ′ hardened. Their strength was not sufficient to compete with nickel-base superalloys. Some nickel-base and iron-nickel-base superalloys also are solid-solution strengthened. However, the alloys used for highest...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350095
EISBN: 978-1-62708-315-7
...-alloy steels II Ferritic and martensitic stainless steels III Austenitic stainless steels with 21–40% Ni and iron-base superalloys IV Nickel- and cobalt-base superalloys As a general rule, overall aluminum diffusion is slowed as the nickel, chromium, and cobalt contents increase...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280189
EISBN: 978-1-62708-267-9
... processes such as electrochemical machining (ECM). Superalloys generally are classified as having poor machinability. This is not surprising, because the very characteristics that render superalloys good high-temperature materials are responsible for their poor machining behavior. The iron-nickel-base...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280149
EISBN: 978-1-62708-267-9
... of these materials is straightforward, in that they usually do not require 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...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280041
EISBN: 978-1-62708-267-9
...-iron-base superalloys also segregate positively. Furthermore, the segregated regions are different in density from the matrix; thus, increasing hardener content in a superalloy increases the tendency to freckle. Fig. 4.3 Mushy-zone thickness vs. ingot diameter Figure 4.4 shows a section...