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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001508
EISBN: 978-1-62708-236-5
... turbine (turbojet) engines, involves the rework and/or replacement of many components including the fuel nozzle heat shields. These heat shields, which are fabricated by press forming from annealed type 321 corrosion resistant steel (CRES) sheet, are utilized to keep hot combustion gases from affecting...
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
...-Rupture Behavior on Turbine Airfoils Summary Prolonged exposure to elevated temperature in the hot section of gas turbine engines can lead to separation of turbine blade airfoils via stress-rupture mechanisms resulting in costly engine damage and potential engine shutdown. A combination of visual...
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
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001081
EISBN: 978-1-62708-214-3
... Abstract Several compressor disks in military fighter and trainer aircraft gas turbine engines cracked prematurely in the bolt hole regions. The disks were made of precipitation-hardened AM355 martensitic stainless steel. Experimental and analytical work was performed on specimens from...
Image
Published: 01 January 2002
blades (B) with significant airfoil damage from the overtemperature condition, which had a detrimental effect on their microstructures. The fourth-stage blades (C) ruptured as a result of lower fracture toughness and creep resistance, which is caused by elevated-temperature operation in gas turbine More
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
... turbine engine . J. Eng. Fail. Anal. 15 ( 8 ), 1111 – 1129 ( 2008 ) 10.1016/j.engfailanal.2007.11.020 5. Hour J. , Wicks B.J. , Antoniou R.A. : An investigation of fatigue failures of turbine blades in a gas turbine engine by mechanical analysis . J. Eng. Fail. Anal. 9 ( 2...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001748
EISBN: 978-1-62708-225-9
... reoccurrence, specific inspection criteria were issued defining maximum limits for spline wear. A procedure and requirements were specified for installing the coupling and pinion gear at the next overhaul. Gas turbine engines Inspection Pinions Specifications Splines AMS 6470 UNS K24065 (Other...
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
... was considered generic, and the conclusion was that the primary failure mechanism was LCF. Material imperfections were a secondary deficiency that had the effect of causing the blades from the bad HIP lot to crack first. Gas turbine engines Hot isostatic pressing Low cycle fatigue Turbine blades Nickel...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0047645
EISBN: 978-1-62708-229-7
... of the welding torch were overhauled to ensure that leak-in or entrainment of air was eliminated. Also, the purity of the shielding-gas supplies was rechecked to make certain that these had not become contaminated. Contaminants Gas turbine engines Shielded arc welding Thermal stresses Ti-5Al-2.5Sn UNS...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0090114
EISBN: 978-1-62708-229-7
... applying the specially designed methods given in this case study to estimate the metal temperature and stresses in order to predict the life of turbine blades under similar operating conditions. Gas turbine engines Grain boundaries Stress and strain analysis Thermal stresses Turbine blades...
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
... Overview of Gas Turbine Engine Hot Parts Hot Corrosion Type II Transition Type Case Histories Case History No. 1: First-Stage Bucket Damage Investigation Summary Case History No. 2: First-Stage Nozzle Damage Investigation A severely cracked first-stage nozzle originating from a GE MS...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0047072
EISBN: 978-1-62708-217-4
... Abstract Postflight inspection of a gas-turbine aircraft engine that had experienced compressor stall revealed that the engine air-intake bullet assembly had dislodged and was seated against the engine-inlet guide vanes at the 3 o'clock position. The bullet assembly consisted of an outer...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0090030
EISBN: 978-1-62708-217-4
... Gas turbine engines Microcracking Phase transformations Rotors Titanium Fatigue fracture Brittle fracture In 1989, a United Airlines DC-10 in transit from Denver to Chicago experienced failure of the center engine. The titanium compressor disk burst and severed the hydraulics of the plane...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0047681
EISBN: 978-1-62708-229-7
... current to reduce the temperature, by an increase in the electrode force, or both. Compressors Gas turbine engines Welding parameters Ti-6Al-4V UNS R56406 Joining-related failures Fatigue fracture A fluorescent liquid-penetrant inspection of an experimental stator vane of a first-stage...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0047986
EISBN: 978-1-62708-217-4
... examination of circumferential section of the largest cavity, was exhibited by the second bearing. It was concluded that the fracture of the cage was caused by overheating and misalignment caused excessive stressing of the bearing on the main shaft. Bearing races Gas turbine engines Overheating...
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
.... Cohen H. , Rogers G.F.C. , Saravanamutto H.I.H. : Gas Turbine Theory , 2nd edn. , pp. 111 – 119 . Longman , London ( 1981 ). 2. Huenecke K. : Fundamentals of theory, design and operation . In: Jet Engines , 4th edn. , pp. 110 – 114 . Motorbooks International , Osceola...
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
... life of gas turbine blades depends on the time it requires to initiate engineering-size cracks, or irreparable loss of metal occurs by FOD or corrosion. Cracks may initiate due to the exhaustion of creep life (which may manifest in the form of numerous creep cavities at critical locations of a blade...
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
... significant financial implications related to the high capital cost of the gas turbines themselves and the considerable value of lost production in the wake of an engine failure. This article focuses on common failures of the components associated with the flow path of industrial gas turbines. Examples...
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
...-water rinse. The water wash chemicals vaporized before they reached the stage 1 HPT nozzles. The highest-boiling-point constituent boils at roughly 315 to 370 °C (600 to 700 °F). The engine was also washed each time it was taken off-line for maintenance. The gas turbine was brought up to cranking speed...