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Turbine blade superalloy

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Published: 15 January 2021
Fig. 11 Fracture surfaces of a nickel-base superalloy turbine blade. (a) Secondary electron image of interdendritic stress-rupture fracture at the trailing edge (TE) of single-crystal turbine blade casting showing creep voids on the fracture surface. (b) Scanning electron microscopy More
Image
Published: 01 November 2010
Fig. 2 Grain structure in a directionally solidified superalloy turbine blade simulated with the cellular automaton method. The <100> pole figures are displayed for various cross sections perpendicular to the main blade axis. Source: Ref 26 More
Image
Published: 01 January 1990
Fig. 3 The evolution of the processing of nickel-base superalloy turbine blades. (a) From left, equiaxed, directionally solidified, and single-crystal blades. (b) An exposed view of the internal cooling passages of an aircraft turbine blade. Source: Ref 5 More
Series: ASM Handbook
Volume: 1
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v01.a0001051
EISBN: 978-1-62708-161-0
... superalloys aircraft turbine blades directional solidification casting THE PRIMARY GOALS in the continuing development of the aircraft gas turbine are increased operating temperatures and improved efficiencies. A more efficient turbine is required to achieve lower fuel consumption. Higher turbine inlet...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004158
EISBN: 978-1-62708-184-9
... International Corrosion in the Combustor and Turbine Sections The materials commonly found in the combustor and turbine sections are superalloys and stainless steels. Nickel-base superalloys are typically used for combustor liners, transitions, blades, vanes, shrouds, and sometimes disks because...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006824
EISBN: 978-1-62708-329-4
... of the turbine. From other failures in the fleet, the disc was known to be prone to cracking in a similar location, resulting in release of turbine blades into the turbine flow path. The disc was manufactured from Discaloy (Westinghouse Electric Corporation), a wrought, iron-base superalloy (26% Ni, 13.5% Cr...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003517
EISBN: 978-1-62708-180-1
... versus the time. More information is presented later in this article. Fig. 4 Examples of thermal-mechanical fatigue cracking and oxidation in a first-stage turbine blade Metallurgical Instabilities Metallurgical instabilities form when superalloy turbine blades and steel tubes or piping...
Series: ASM Handbook Archive
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000616
EISBN: 978-1-62708-181-8
... Abstract This article is an atlas of fractographs that covers nickel-base superalloys. The fractographs display the following: hydrogen-embrittlement fracture; segment of a fractured second-stage gas-turbine wheel; gas-producer turbine rotor cast; dendritic stress-rupture fracture surface...
Image
Published: 01 January 1990
Fig. 36 Location and structure of tungsten fibers in fiber-reinforced superalloy composite turbine blades for rocket engine turbopumps. Courtesy NASA Lewis Research Center More
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
.... Ingestion of seawater spray into helicopter engines used in the Vietnam war wreaked havoc in low-chromium turbine blades, leading to a reevaluation of the use of chromium in superalloys. The trend toward the increased use of refractory metals is shown in Fig. 2 and Table 5 . It is apparent...
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
... of nickel-base superalloy turbine blades. (a) From left, equiaxed, directionally solidified, and single-crystal blades. (b) An exposed view of the internal cooling passages of an aircraft turbine blade. Source: Ref 5 The logical progression to grain-boundary reduction is the total elimination...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004133
EISBN: 978-1-62708-184-9
... turbine blades ( Ref 15 ). Although superalloys have been used extensively in gas turbines, they have not been evaluated with experience in steam turbines. An important consideration for the selection of these candidate superalloys was to have thermal expansion coefficients close to that of the 12Cr rotor...
Series: ASM Handbook
Volume: 5A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v05a.a0005737
EISBN: 978-1-62708-171-9
... airfoils. Design requirements are reviewed and compared between aerospace and power generation coatings. Application process improvement areas are also discussed as a method of reducing component cost. aerospace engines combustors gas turbines high-power turbine blades high-pressure compressors...
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
... prealloyed powder superalloys THE TERM SUPERALLOY is used to describe those materials with high strength at high temperatures that are used primarily in turbine engines for aircraft and power generation. Superalloys are predominantly nickel-base alloys that are strengthened by solid-solution elements...
Book Chapter

Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001293
EISBN: 978-1-62708-170-2
... in Heat Treating, Volume 4 of the ASM Handbook; see the articles “Boriding (Boronizing)” and “Thermoreactive Deposition/Diffusion Process,” respectively. Diffusion Coatings for Gas Turbine Engine Hot Section Parts Blades and vanes made from nickel- and cobalt-base superalloys that are used...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006787
EISBN: 978-1-62708-295-2
... coatings that improve performance of superalloy. diffusion gas turbines high-temperature coatings high-temperature corrosion interdiffusion oxidation superalloys WHEN CORROSION FAILURES OCCUR at high temperatures (300 to 1700 °C, or 570 to 3090 °F), the unscheduled outages result in loss...
Series: ASM Handbook
Volume: 5A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v05a.a0005738
EISBN: 978-1-62708-171-9
... ceramics ABRADABLE CLEARANCE-CONTROL COATINGS are successfully used today (2013) in aero-engine, industrial and steam turbine, and various other types of turbomachinery applications. In most types of turbines, it is necessary to leave clearances beyond the free ends of the blades and vanes to provide...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006781
EISBN: 978-1-62708-295-2
... of interest based on loading conditions, boundary conditions, the ability to inspect the component, and the effect of failure on surrounding components and human life, among other things. In a general way, failure may be thought of as loss of function of the part. As an example, failure for a turbine blade...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001103
EISBN: 978-1-62708-162-7
.... Mechanical Alloying Alloy Applications MA ODS (oxide dispersion-strengthened) alloys were used first in aircraft gas-turbine engines and later in industrial turbines. Components include vane airfoils and platforms, blades, nozzles, and combustor/augmentor assemblies. As experience was gained...
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
... equiaxed grains, but important improvements in properties also are achieved in castings that solidify in a columnar direction or as a single crystal ( Fig. 1 ). Fig. 1 Macrostructure of three turbine blades: polycrystalline (left), columnar grain directionally solidified (center), and single-crystal...