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cast cobalt-based superalloys

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Published: 01 December 2004
Fig. 6 Cast dendritic structure of MAR-M 509 cobalt-base superalloy revealed using (a) 15 mL HCl, 10 mL acetic acid, and 10 mL HNO 3 , (b) the Lucas electrolytic reagent (2 V dc, 20 s), and (c) Beraha's tint etch (50 mL HCl, 50 mL water, 0.8 g K 2 S 2 O 5 , 4 g NH 4 F·HF More
Series: ASM Handbook
Volume: 1
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v01.a0001050
EISBN: 978-1-62708-161-0
... Abstract The initial cast superalloy developments in the United States centered on cobalt-base materials. Nickel-base and nickel-iron-base superalloys owe their high-temperature strength potential to their gamma prime content. For polycrystalline superalloy components, high-temperature strength...
Series: ASM Handbook
Volume: 4E
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.hb.v04e.a0006267
EISBN: 978-1-62708-169-6
.... Strengthening of cobalt-base alloys is accomplished by solid-solution alloying (e.g., molybdenum, tungsten, tantalum, and niobium) in combination with carbon to promote carbide precipitation. Compared to the wrought alloys, cast cobalt-base superalloys are characterized by higher contents of high-melting metals...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003771
EISBN: 978-1-62708-177-1
... in cast, wrought, and powder metal forms, including magnetic alloys as well as several cobalt-base superalloys. cobalt alloys Hastelloy Haynes alloys metallographic preparation metallography metallurgy microstructure COBALT is used as an alloying element in alloys for various applications...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003120
EISBN: 978-1-62708-199-3
... on the mechanical properties and chemical composition of nickel, iron, and cobalt-base superalloys in both the cast and wrought forms. chemical composition cobalt-base superalloys environmental factors high-temperature applications iron-base superalloys mechanical properties metal processing...
Image
Published: 01 December 1998
Fig. 2 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×; right, 3300×). Note script More
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003737
EISBN: 978-1-62708-177-1
... CNK7 revealed using (a) glyceregia, (b) Kalling's No. 2, (c) the Lucas electrolytic reagent (2 V dc, 10 s), and (d) Beraha's tint etch (50 mL HCl, 50 mL water, 0.8 g K 2 S 2 O 5 , 4 g NH 4 F·HF, 1 g FeCl 3 Fig. 6 Cast dendritic structure of MAR-M 509 cobalt-base superalloy revealed using...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003148
EISBN: 978-1-62708-199-3
... In nickel-base superalloys, cobalt (which is presently typically in the range 10 to 15 wt%) provides solid-solution strengthening and decreases the solubility of aluminum and titanium, thereby increasing the volume fracture of γ′ precipitate. Cobalt in nickel-base superalloys also reduces the tendency...
Series: ASM Handbook
Volume: 1
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v01.a0001049
EISBN: 978-1-62708-161-0
... Abstract This article focuses on the properties of conventional wrought superalloys based on nickel, iron, and cobalt, as well as on the properties of alloys produced from powder. The powder metallurgy (P/M) category includes alloys that were originally developed as casting alloys; new alloy...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005335
EISBN: 978-1-62708-187-0
... coatings continuous casting gas turbines heat treatment hot isostatic pressing microstructure orthopedic implants phases physical metallurgy crystallography foundry methods argon-oxygen decarburization cobalt alloy castings wear-resistant alloys corrosion-resistant alloys COBALT-BASE...
Series: ASM Handbook
Volume: 1
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v01.a0001052
EISBN: 978-1-62708-161-0
... Superalloys are the major materials of construction for today's high-temperature gas turbine engines used for both commercial and military aircraft. Nickel-base superalloys, along with iron-base and cobalt-base superalloys, are used throughout the engines in wrought, cast, powder metallurgy (P/M), and cast...
Series: ASM Handbook
Volume: 4E
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.hb.v04e.a0006266
EISBN: 978-1-62708-169-6
... 48.0–52.0 … … … … … … … … … 50Ni-50Cr-Nb (ASTM A560) 0.10 bal 47.0–52.0 … … … … … … … … 1.4–1.7 Nb (a) Alloy Casting Institute designation Cast Nickel-Base Superalloys Superalloys are nickel-, iron-nickel-, and cobalt-base alloys generally used at temperatures...
Series: ASM Handbook
Volume: 4D
Publisher: ASM International
Published: 01 October 2014
DOI: 10.31399/asm.hb.v04d.a0005961
EISBN: 978-1-62708-168-9
... “Heat Treatment of High-Alloy Nickel-Cobalt Steels” in this Volume). Another closely related class of alloys include iron-base PH superalloys, which evolved from austenitic stainless steels. Iron-base superalloys are strengthened by either solid-solution hardening or precipitation hardening. Thus...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001073
EISBN: 978-1-62708-162-7
...-Performance Alloys , Volume 1 of ASM Handbook , formerly 10th Edition Metals Handbook. Nickel-base and cobalt-base castings for high-temperature service are also covered in the article “Polycrystalline Cast Superalloys” in Properties and Selection: Irons, Steels, and High-Performance Alloys , Volume 1...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003188
EISBN: 978-1-62708-199-3
... Associates, Inc. Cobalt-Base Cutting Tools Cobalt-base cutting tools have been available since about 1920. These materials are generally cast cobalt-chromium-tungsten alloys with carbon and other alloy additions. They are not heat treatable, and the maximum hardness (55 to 65 HRC) occurs near...
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
... ) are those based on aluminum (aluminizing), chromium (chromizing), and silicon (siliconizing). Substrate materials include nickel- and cobalt-base superalloys, steels (including carbon, alloy, and stainless steels), and refractory metals and alloys. Multicomponent pack cementation coatings have been...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003331
EISBN: 978-1-62708-176-4
... (nodular) irons, cast 1034 150 276 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...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001430
EISBN: 978-1-62708-173-3
... the ductility of a welded structure. A postweld heat treatment is recommended, especially if the cold forming of a weldment after welding is a required part of the fabrication sequence. Tensile properties of welded cobalt-base corrosion-resistant alloy UNS R31233 relative to wrought and cast products at room...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006094
EISBN: 978-1-62708-175-7
... Abstract Superalloys are predominantly nickel-base alloys that are strengthened by solid-solution elements including molybdenum, tungsten, cobalt, and by precipitation of a Ni 3 (Al, Ti) type compound designated as gamma prime and/or a metastable Ni 3 Nb precipitate designated as gamma double...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001453
EISBN: 978-1-62708-173-3
... discusses primarily nickel- and cobalt-base alloys. Superalloys can also be subdivided (according to manufacturing technology) into two categories: conventional cast and wrought alloys and powder metallurgy (P/M) products. Powder metallurgy products may be produced in conventional alloy compositions...