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wrought cobalt-based superalloys

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Published: 01 March 2002
Fig. 14.4 Microstructure of solution treated Haynes 188 wrought cobalt-base superalloy before and after exposure at 871 °C (1600 °F). (a) Before. (b) After 6244 h exposure. Etched in HCl + H 2 O 2 , 500× 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...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280323
EISBN: 978-1-62708-267-9
... by the metal and time at temperature. Nickel-base and cobalt-base superalloys generally have incipient melting temperatures above about 2150 °F (1175 °C). Table 14.1 gives some melting and γ′ solvus temperatures for a few wrought superalloys. Table 14.2 gives similar limited information on cast...
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...
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 Groups, Crystal Structures, and Phases Superalloy Groups As noted earlier, there are three groups of superalloys (iron-nickel-, nickel-, and cobalt-base), which are further subdivided into cast and wrought (where wrought includes powder...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280211
EISBN: 978-1-62708-267-9
..., except in a secondary sense through the coating diffusion heat treatment of 4 h at 1950 to 2050 °F (1065 to 1120 °C), which may be applied if a coating is required. Wrought cobalt-base superalloys have carbide modifications produced during the fabrication sequence. Carbide distributions in wrought...
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...
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
... with consecutive positions in the periodic table of elements. The iron-nickel-base superalloys are an extension of stainless steel technology and generally are wrought, whereas cobalt- and nickel-base superalloys may be wrought or cast, depending on the application/composition involved. The more highly alloyed...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280339
EISBN: 978-1-62708-267-9
... to the 1960s, major advances occurred. The need for high-strength, high-temperature-resistant superalloys soared with the introduction of the gas turbine engine for aircraft applications. Iron-nickel-base superalloys were developed further as wrought materials, new cobalt-base superalloys were invented...
Image
Published: 01 March 2002
Fig. 3.4 Typical operating microstructures of representative superalloys. (a) Cast cobalt-base alloy. 250×. (b) Cast nickel-base alloy. 100×. (c) Wrought (left, 3300×) and cast (right, 5000×) nickel-base alloys. (d) Two wrought iron-nickel-base alloys (left, 17,000×); IN-718 (right, 3300 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.9781627082679
EISBN: 978-1-62708-267-9
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
... the principal driver for superalloy development, and the systems of the time were geared for wrought products. Cobalt-Base versus Iron-Nickel- and Nickel-Base Superalloys Cast cobalt-base superalloys such as Vitallium were interesting and extremely useful in components where the highest strengths were...
Image
Published: 01 March 2002
Fig. 12.31 1000 h rupture strength of selected wrought cobalt- and iron-nickel-base superalloys vs. temperature. Note the inclusion of iron-base ODS superalloy MA-956 for comparison. More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.sap.t53000025
EISBN: 978-1-62708-313-3
... affect the chemical stability of their matrix by locally depleting carbide-forming elements ( Ref 7 ). Cobalt-base superalloys are primarily strengthened through carbide precipitation because they are not precipitation hardened by intermetallic compounds. In wrought cobalt-base alloys, where carbon...
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
... machinability characteristics are defined as falling between the two extremes of turning processes on wrought A-286 and cast PC IN-100, some selected superalloys may be ranked in order of increasing ease of machining as: MAR-M-302 (cobalt-base) AF2–1DA (nickel-base) René 95 (nickel-base) U-500...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.tt2.t51060273
EISBN: 978-1-62708-355-3
... 40 Copper casting alloys( a ) 965 140 62 9 Stainless steels, standard austenitic grades; wrought, cold worked 965 140 517 75 Niobium and its alloys 931 135 241 35 Iron-base superalloys; cast, wrought 924 134 276 40 Cobalt-base superalloys, wrought 800 116 241 35...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280001
EISBN: 978-1-62708-267-9
...? Superalloys are nickel-, iron-nickel-, and cobalt-base alloys generally used at temperatures above about 1000 °F (540 °C). The iron-nickel-base superalloys such as the popular alloy IN-718 are an extension of stainless steel technology and generally are wrought. Cobalt-base and nickel-base superalloys may...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280357
EISBN: 978-1-62708-267-9
... others) that generally are brittle and detrimental to the mechanical properties of superalloys, particularly nickel-base superalloys. These phases can form in iron-nickel-and cobalt-base superalloys as well. Based on early studies on stainless steels, these phases, and particularly σ phase, can...
Image
Published: 01 July 2009
Fig. 6.43 Assessment of thermomechanical fatigue life prediction capability of total strain version of strain-range partitioning for cast nickel-base superalloy B-1900+Hf and wrought cobalt-base alloy Haynes 188. Source: Ref 6.27 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2001
DOI: 10.31399/asm.tb.aub.t61170540
EISBN: 978-1-62708-297-6
... as metallurgical and non-metallurgical. Metallurgical uses include 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...