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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001609
EISBN: 978-1-62708-229-7
... Abstract Alloy 430 stainless steel tube-to-header welds failed in a heat recovery steam generator (HRSG) within one year of commissioning. The HRSG was in a combined cycle, gas-fired, combustion turbine electric power plant. Alloy 430, a 17% Cr ferritic stainless steel, was selected because...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0091754
EISBN: 978-1-62708-229-7
... Reference 1. Swaminathan V.P and Lukezich S.J. , Degradation of Transition Duct Alloys in Gas Turbines , Advanced Materials and Coatings for Combustion Turbines , Swaminathan V.P. and Cheruvu N.S. , Ed., ASM International , 1994 , p 106 Selected Reference Selected...
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
... Abstract Gas turbines and other types of combustion turbomachinery are susceptible to hot corrosion at elevated temperatures. Two such cases resulting in the failure of a gas turbine component were investigated to learn more about the hot corrosion process and the underlying failure mechanisms...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0047621
EISBN: 978-1-62708-229-7
..., and flange and more skillful welding techniques to avoid undercutting and unfused interfaces. Arc welding Combustion chamber Flanges Gas turbine engines Pipe fitting Undercuts Welding defects Inconel 718 (Nickel-base superalloy) UNS N07718 Fatigue fracture Joining-related failures...
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
... involving localized melting (refer to Example 3 in this article). The hot gas surrounding the components in the combustion section and the first stage of the turbine may be at a temperature that is sufficient to cause melting. Such components rely on cooling to keep the metal temperatures at a safe...
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
..., this evaluation of gas turbine bucket failures focussed on examination of operating stresses, environmental (corrosion) attack, and the microstructure of the bucket alloy. Background A 37.5 mW combustion turbine in a power plant located approximately 1 km from the Pacific Ocean operates on #2 diesel fuel...
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Published: 01 January 2002
Fig. 9 Corrosion products on the grain facets from SCC of a U-700 turbine blade, presumably from combustion-gas attack that induced SCC, with IG and transgranular modes shown More
Image
Published: 15 January 2021
Fig. 9 Corrosion products on the grain facets from stress-corrosion cracking (SCC) of a U-700 turbine blade, presumably from combustion-gas attack that induced SCC, with intergranular and transgranular modes shown More
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
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001757
EISBN: 978-1-62708-241-9
... on the results, the cause of the fractured blade was high-amplitude fatigue due to severe stall. After normal engine usage of five months, the blade fractured sending fragments throughout the combustion and turbine sections. aircraft rotor blades fatigue fracture work hardening stainless steel fatigue...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001756
EISBN: 978-1-62708-241-9
... of rotor blades in each stage. The HP nozzle guide vane (NGV) assembly is positioned on the rear combustion inner case and has air-cooled vanes welded together in groups of three, forming a circular vane assembly secured by HP turbine front air seal and outer retaining ring. The HP turbine rotor...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001358
EISBN: 978-1-62708-215-0
... Several compressor diaphragms from five gas turbines cracked after a short time in service. The vanes were made from type 403 martensitic stainless steel. Welding was performed using type 309L austenitic stainless steel filler metal. Applications The compressor is part of the combustion system...
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
... usefulness. Combustion turbine hot section rotating blades are fabricated from nickel-base superalloys and operate at high temperatures and aggressive environments. Both metallurgical and mechanical property degradation of the blading material occurs during service, which can limit the useful service life...
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
... in causing hot corrosion ( Ref 29 , 30 ). Chloride salts can act as a fluxing agent and dissolve protective oxide films. Air in a marine environment ingested into the combustion zone of any marine gas turbine engine is laden with chlorides, unless properly filtered. Sodium chloride has been viewed...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006815
EISBN: 978-1-62708-329-4
... with prototypes, the engineering design may be completed without any formal engineering analysis. The engineering design process for a combustion turbine engine, however, is at the opposite end of the spectrum. The first step in the process begins with task clarification that leads to a design specification...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001281
EISBN: 978-1-62708-215-0
... Abstract The first-stage nozzles of a high-pressure turbine section of an industrial gas turbine exhibited leading and trailing-edge deterioration. The nozzles were made of X-40, a cobalt-base alloy, and were aluminide coated. Failure analysis determined that the deterioration was the result...
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
... failures, molten salts for energy storage, and degradation and failures in gas turbines. The article describes the effects of environment on aero gas turbine engines and provides an overview of aging, diffusion, and interdiffusion phenomena. It also discusses the processes involved in high-temperature...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001145
EISBN: 978-1-62708-217-4
... Abstract Cartridge-pneumatic starter systems are used on military aircraft. In the cartridge mode used for alert starts, the starter turbine is driven by hot gases produced through the controlled burning of a solid propellant cartridge within a closed chamber (the breech chamber/cartridge...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001681
EISBN: 978-1-62708-234-1
... products are liquid, and such corrosion is termed hot corrosion [ Ref 7 , 8 ]. The materials used to withstand such an environment are usually alloys which have been successfully used in high temperature gas turbines, in which they are subjected to similar severe operating condition [ 9...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001814
EISBN: 978-1-62708-241-9
...-lined combustion chamber and a lower water quench chamber. The gasifier feed is a high concentration water slurry of petroleum coke containing minor additives. This slurry is injected into the top of the gasifier where it reacts with oxygen at high pressure and temperature, producing synthesis gas...