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cobalt-base heat-resistant alloys

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2001
DOI: 10.31399/asm.tb.aub.t61170540
EISBN: 978-1-62708-297-6
... elements and carbides affect toughness, hardness, ductility, and strength as well as resistance to heat, corrosion, and wear. cobalt-base corrosion-resistant alloys cobalt-base heat resistant alloys cobalt-base wear-resistant alloys Composition Introduction and Overview Cobalt-Base Wear...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080445
EISBN: 978-1-62708-304-1
...Abstract Abstract This appendix is a collection of tables listing the chemical compositions of wrought ferritic steels; wrought stainless steels; cast corrosion- and heat-resistant alloys; wrought iron-, nickel-, and cobalt-base alloys; cast nickel- and cobalt-base alloys; oxide-dispersion...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280149
EISBN: 978-1-62708-267-9
... superalloys are considerably less weldable than cobalt-base superalloys. Because of the presence of the strengthening phase, when fusion welded, these alloys tend to be susceptible to hot cracking (weld cracking) and postweld heat treatment (PWHT) cracking, sometimes called strain-age cracking (see subsequent...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240265
EISBN: 978-1-62708-251-8
... 150–200  300–400 0.48–0.54 T m Titanium alloys 315  600 0.3 T m Low-alloy steels 370  700 0.36 T m Austenitic iron-base heat-resisting alloys 540 1000 0.49 T m Nickel- and cobalt-base heat-resisting alloys 650 1200 0.56 T m Refractory metals and alloys 980...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240547
EISBN: 978-1-62708-251-8
..., corrosion-resistant, or heat-resistant alloys. The single largest application of cobalt-base alloys is for wear resistance. In heat-resistant applications, cobalt is more widely used as an alloying element in nickel-base alloys than as cobalt-base alloys. Alloying elements such as chromium, tungsten...
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 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 December 2001
DOI: 10.31399/asm.tb.aub.9781627082976
EISBN: 978-1-62708-297-6
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060315
EISBN: 978-1-62708-261-7
... types of commercial alloys are outlined in Chapter 5, “Modern Alloy Production,” in this book. Heat treatment of aluminum, cobalt, copper, magnesium, nickel-base superalloys, and titanium alloys is discussed in Chapter 14, “Nonferrous Heat Treatment.” 13.1 Light Metals (Al, Be, Mg, Ti) 13.2...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280025
EISBN: 978-1-62708-267-9
... in superalloys, it is present in some cobalt-base alloys and in Nimonic 80A, a nickel-chromium-titanium-aluminum superalloy, when heated above 1830 °F (999 °C). Additions of such elements as cobalt, molybdenum, tungsten, or niobium to nickel-base alloys prevents formation of M 7 C 3 . Massive Cr 7 C 3 is formed...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2001
DOI: 10.31399/asm.tb.aub.t61170573
EISBN: 978-1-62708-297-6
... 5170 750 558 81 13 5.8 6.8 50 (a) Based on a value of 100 for the most abrasion-resistant material The commercially significant alloys contain cobalt in the range of 3 to 25 wt%. For machining purposes, alloys with 3 to 12% Co and carbide grain sizes from 0.5 to more than 5 μm...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2001
DOI: 10.31399/asm.tb.aub.t61170495
EISBN: 978-1-62708-297-6
... and Tantalum Aluminum and Titanium Carbon and Carbides Intermetallic Phases Most of the difficulties in processing nickel-base alloys are associated with the higher strength solid-solution-strengthened alloys and heat-resistant alloys strengthened by the γ′ precipitate. In general...
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
... are responsible for their poor machining behavior. The iron-nickel-base superalloys, which have descended from stainless steels, usually machine more easily than the nickel-base and cobalt-base superalloys under similar conditions of heat treatment. However, the iron-base alloys do present chip-breaking problems...
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
... Alloys Nickel- and iron-nickel-base superalloys are considerably less weldable than cobalt-base superalloys. Because of the presence of the γ′ strengthening phase, the alloys tend to be susceptible to hot cracking (weld cracking) and postweld heat treatment (PWHT) cracking (strain age or delay...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080423
EISBN: 978-1-62708-304-1
..., and other accessories, require materials resistant to molten zinc corrosion. Nickel and high-nickel alloys react readily with molten zinc by direct alloying. This is illustrated in Fig. 16.1 , which shows a nickel-base alloy coupon after immersion in molten zinc at 455 °C (850 °F). Iron- and cobalt...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280211
EISBN: 978-1-62708-267-9
.... In cobalt-base cast superalloys, script MC carbides are liberally interspersed within grains, causing a form of dispersion hardening that is not of a large magnitude, owing to its relative coarseness. The distribution of carbides in cast alloys can be modified by heat treatment, but strength levels attained...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300227
EISBN: 978-1-62708-323-2
... they are subjected to liquid, droplet, and solid particle erosion. It also discusses the tribology of nickel- and cobalt-base alloys as well as titanium, zinc, tin, aluminum, magnesium, beryllium, graphite, and different types of wood. alloy composition cobalt-base alloys corrosion-resistant metals friction...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280287
EISBN: 978-1-62708-267-9
... hot-corrosion-type degradation processes. As a result of hot corrosion failures and alloy studies, superalloys were created that were/are more resistant to hot corrosion than the initial high-strength cast airfoil superalloys such as IN-100 and B-1900 nickel-base superalloys. Cobalt-base...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080249
EISBN: 978-1-62708-304-1
..., and 1900 °F) for 100 h, using 1% S diesel fuel, 30:1 air-to-fuel ratio, and 200 ppm sea salt injection. Source: Bergman et al. ( Ref 22 ) Fig. 9.1 Relative hot corrosion resistance of cobalt-base alloys obtained from burner rig tests using 3% S residual oil and 325 ppm NaCl in fuel (equivalent...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280323
EISBN: 978-1-62708-267-9
... temperatures for which these alloys are normally specified. This section deals principally with the effects of microstructural changes, melting and corrosion on nickel-base and cobalt-base superalloys for temperatures at or above about 1400 °F (760 °C) and mostly above 1500 °F (816 °C). It also touches...
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
... in nickel-and nickel-iron-base superalloys and to impart oxidation resistance through the formation of an alumina scale. Iron is used when possible, simply to reduce cost. Titanium also forms strengthening precipitates in nickel-base alloys and, to a small degree, in cobalt-base superalloys. Nickel...