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Turbine blade superalloy

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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
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001758
EISBN: 978-1-62708-241-9
... Fig. 1 Data showing improvements in stress-rupture life for the equiaxed (EQ), directionally solidified (DS), and single crystal (SX) type castings Fig. 2 Macroetched turbine blades showing characteristic grain structure for equiaxed (EQ), directionally solidified (DS), and single...
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
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: 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 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 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
...: Environments and Industries . ASM International , Materials Park ( 2006 ) 2. Khajavi M.R. , Shariat M.H. : Failure of first stage gas turbine blades . Eng. Fail. Anal . 11 , 589 – 597 ( 2004 ) 10.1016/j.engfailanal.2003.08.010 3. Singh H. , Puri D. , Prakash S...
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...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003555
EISBN: 978-1-62708-180-1
... sulfate deposits that accumulate on the surfaces of high-temperature components such as hot section turbine blades and vanes. High-temperature hot corrosion usually occurs at metal temperatures ranging from 850 to 950 °C (1560 to 1740 °F). Type 1 hot corrosion involves general broad attack caused...