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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
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0046972
EISBN: 978-1-62708-217-4
... metal. It was also determined that directionally solidified blades could minimize thermal fatigue cracking by eliminating intersection of grain boundaries with the surface. However, this improvement would be more costly than applying a protective coating. Airfoils Turbine blades Superalloy...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001657
EISBN: 978-1-62708-227-3
... Abstract The circumstances surrounding the in-service failure of a cast Ni-base superalloy (Alloy 713LC) second stage turbine blade and a cast and coated Co-base superalloy (MAR-M302) first stage air-cooled vane in two turbine engines used for marine application are described. An overview...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001143
EISBN: 978-1-62708-229-7
... Turbine blade superalloy Stress-corrosion cracking Cavitation wear Fatigue fracture Corrosion fatigue Introduction Turbine blade failure was defined, for the purposes of an Electric Power Research Institute (EPRI) survey on the subject [ 1 ], as: “a situation where inspection of the turbine...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001758
EISBN: 978-1-62708-241-9
.... To achieve such remarkable results, turbine blade engineers over the last 40 years have developed various gamma prime (γ′) strengthened, nickel-based superalloys that can be investment cast into an airfoil shape with intricate internal passages required for airfoil cooling. The earlier versions...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001357
EISBN: 978-1-62708-215-0
... Abstract Two 20 MW turbines suffered damage to second-stage blades prematurely. The alloy was determined to be a precipitation-hardening nickel-base superalloy comparable to Udimet 500, Udimet 710, or Rene 77. Typical protective coatings were not found. Test results further showed that the fuel...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0090181
EISBN: 978-1-62708-229-7
...-base superalloy Fatigue fracture Metalworking-related failures This case history builds on the cracked gas turbine blades shown in Fig. 1 , 2 , 3 . Cracking was found to initiate from a mechanism of LCF. Low-cycle fatigue is induced during thermal loading cycles in gas turbines (each cycle...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001827
EISBN: 978-1-62708-241-9
... of high-temperature oxidation on the hot corrosion process. Preventative measures are also discussed. gas turbine thermal fatigue cracking hot corrosion superalloys corrosion cavities spark optical emission spectrometry operating temperature GTD 111 (cast nickel-base superalloy) FSX 414...
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 Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001829
EISBN: 978-1-62708-241-9
... excessive oxidation and corrosion of high-strength nickeland cobalt-base superalloys being used for turbine blades and vanes [ 1 , 2 ]. The first-stage vanes are subjected to the highest gas velocity and temperature in the engine. Since the gas entering the first-stage vane can be above the melting...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001658
EISBN: 978-1-62708-229-7
... products Rotor blade shrouds Steam turbines Superalloy High-temperature corrosion and oxidation Introduction During the course of a substantial routine inspection of a large turbine from an oil-fired generating station in Maritime Canada in 1977, and then again in 1979, a substantial deposit...
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 Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001602
EISBN: 978-1-62708-229-7
... Requirements Investment Cast W501B/B6 Turbine Blades , TIS 1004 , Tusco Corporation , 1994 , p. 2 . 9. Sims C.T. , Stoloff N.S. , and Hagel W.C. : Superalloys II, High -Temperature Materials for Aerospace and Industrial Power , 1987 , pp. 423–4 , 433 . 10. Leverant G.R...
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 Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003568
EISBN: 978-1-62708-180-1
... microjet within the pit. Among the components most susceptible to liquid impingement erosion are low-pressure turbine blades, low-temperature steam piping, and condenser or other heat-exchanger tubes that are subjected to direct impingement by wet steam. Liquid impingement erosion in tubing...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006780
EISBN: 978-1-62708-295-2
... 850–950 0.45–0.55 Gas turbine blades Nickel-base superalloys 775–925 0.45–0.60 Burner cans for gas turbine engines Oxide-dispersion-strengthened nickel-base alloys 1350–1400 0.55–0.65 The creep behavior of polymeric materials is more complex, because most plastics respond as true...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003521
EISBN: 978-1-62708-180-1
... mechanisms. Consider, for example, cracking observed in the trailing edges of several service-run gas turbine blades made from cast IN 738 nickel-base superalloy ( Fig. 1 ). When one of the cracks was broken open and examined in a scanning electron microscope (SEM), fractographic examination revealed...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003546
EISBN: 978-1-62708-180-1
... properties (including creep/fatigue/environment properties) and to compute the life of components such as turbine blades using experimental data and models that implicitly or explicitly describe damage evolution as a function of the number of cycles ( Ref 1 , 2 , 3 ). While such experimental and analytical...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006795
EISBN: 978-1-62708-295-2
..., solids-transport systems are damaged by erosion ( Ref 24 , 38 – 40 ). In the aircraft industry, damage has occurred to aircraft engines ( Ref 18 , 20 , 41 – 43 ). The devices for generation of renewable energy (solar panels, turbines of hydroelectric power stations, windmill blades, etc.) also suffer...