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Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001359
EISBN: 978-1-62708-215-0
...Abstract Abstract The cause of low fatigue life measurements obtained during routine fatigue testing of IMI 550 titanium alloy compressor blades used in the first stage of the high-pressure compressor of an aeroengine was investigated. The origin of the fatigue cracks was associated...
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Published: 30 August 2021
Fig. 15 Solid-particle-erosion-damaged compressor blades (titanium alloy) from flight service. The white dashed lines indicate the approximate original contour of the airfoils. The leading edges are facing left, as shown. Note the greater extent of material loss at the trailing edges, where low More
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
...Abstract Abstract Rotor blades in the compressor section of a J79 engine had failed. Optical, stereoscopic, microhardness testing, and SEM examinations were conducted to determine the cause. The blades were made of STS403 and were used uncoated. They were damaged over an extensive area, from...
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Published: 01 January 2002
Fig. 29 Compressor blade fracture surface showing fatigue origins on low pressure (i.e., right) side of blade, as indicated by the arrows. 13× More
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Published: 30 August 2021
Fig. 9 Campbell diagram for a compressor blade showing various vibrational-mode frequencies of the blade (horizontal lines) and the frequency-versus-speed curve for wakes created by the upstream stationary vanes (black diagonal line). TE, trailing edge More
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Published: 30 August 2021
Fig. 26 (a) Photograph of fractured compressor blade. (b) Scanning electron fractograph showing fracture-initiation region. A band with a pronounced oxide scale was observed at the surface (arrows). (c) Optical micrograph of a cross section of the fracture in the initiation region. Original More
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Published: 15 January 2021
Fig. 22 Compressor blade fracture surface showing fatigue origins on low-pressure (i.e., right) side of blade, as indicated by the arrows. Original magnification: 13 × More
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Published: 01 January 2002
Fig. 28 Failed compressor rotor. Arrows indicate fractured portions of blades. 36× More
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Published: 15 January 2021
Fig. 21 Failed compressor rotor. Arrows indicate fractured portions of blades. Original magnification: 36 × More
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 compressor and turbine blades ( Ref 1 ). Creep failure of turbine blades, mostly related to issues with cooling, was found to be the second-most costly damage mode. The failure of rotating components tends to be more costly because their significant kinetic energy results in greater collateral damage...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001576
EISBN: 978-1-62708-219-8
... caused blade failure. Air compressors Burrs Fan blades Stress concentration Cold-rolled steel Fatigue fracture Overview of Blade Failure Some one thousand fans were used on large axial compressors for shop ventilation for about one year. Out of them two fans developed cracks...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001367
EISBN: 978-1-62708-215-0
... metallurgical approach to failure analysis to confirm that the cracking was caused by a caustic stress-corrosion cracking mechanism is presented. Caustic cracking Chemical processing equipment Compressor blades Sodium hydroxide, environment 4320 UNS G43200 Stress-corrosion cracking Background...
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
... ]. Engine Configuration The present failure analysis corresponds to the high-pressure (HP) turbine blades of a low bypass turbofan engine with afterburner. It is a twin spool engine of 40-kN thrust class with multistage axial fan and compressor each driven separately by single stage turbines. It has...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001470
EISBN: 978-1-62708-220-4
...Abstract Abstract One 49-in. impeller of a two-stage centrifugal air compressor disrupted without warning, causing extensive damage to the casings, the second impeller, and the driving gear box. Prior to the mishap, the machine had run normally, with no indications of abnormal vibration...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001362
EISBN: 978-1-62708-215-0
...Abstract Abstract Numerous cracks observed on the surface of a forged A470 Class 4 alloy steel steam turbine rotor disc from an air compressor in a nitric acid plant were found to be the result of caustic induced stress-corrosion cracking (SCC). No material defects or anomalies were observed...
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
...Abstract Abstract Several compressor diaphragms from five gas turbines cracked after a short time in service. The vanes were constructed of type 403 stainless steel, and welding was performed using type 309L austenitic stainless steel filler metal. The fractures originated in the weld heat...
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 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...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006821
EISBN: 978-1-62708-329-4
... Handbook , 2003. Case Study 5: Failure Analysis of Engine Compressor Rotors Two aircraft engine compressor rotors sustained damage during operation. Blades from both rotors were found sheared off, and several blades were lifted from the dovetail portion of the drum. In one of the rotors, all...
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
... true in the high pressure (HP) turbine region of the engine where actual metal surface temperatures of the turbine blades (buckets) can exceed 2000 ° F ∼ 0.75 T m , making creep and stress-rupture properties one of the more important variables in the overall life of the blade...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001354
EISBN: 978-1-62708-215-0
...Abstract Abstract An A-470 steel rotor disk was removed from the high-pressure portion of a steam turbine-powered compressor after nondestructive testing revealed cracks in the shoulder of the disk during a scheduled outage. Samples containing cracks were examined using various methods...