1-20 of 571 Search Results for

operating time

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001737
EISBN: 978-1-62708-229-7
...Abstract Abstract The hot gas casing of a gas turbine used for peak load power production had developed extensive cracking during operation. The operating time was 18,000 h, and it had been subjected to 1,600 operating cycles. The gas temperature on the hot side was 985 deg C, on the cold side...
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
...Abstract Abstract This article focuses on the life assessment methods for elevated-temperature failure mechanisms and metallurgical instabilities that reduce life or cause loss of function or operating time of high-temperature components, namely, gas turbine blade, and power plant piping...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001231
EISBN: 978-1-62708-232-7
...Abstract Abstract The rim of a gear wheel of 420 mm width and 3100 mm in diam broke after four years of operation time in a sheet bar three-high rolling mill. The rim was forged from steel with about 0.4C, 0.8Si and 1.1Mn. The rim started to break in the tooth bottom from a fatigue fracture...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001255
EISBN: 978-1-62708-232-7
...Abstract Abstract Several back up rolls of 1400 mm barrel diam from a broad strip mill broke after a relatively short operating time as a result of bending stresses when the rolls were dismantled. The fracture occurred in the conical region of the neck at about 600 mm diam. The rolls were...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0046422
EISBN: 978-1-62708-234-1
... and experience. Its stator was subject to severe erosion after relatively short operating times and initially required replacement after each test program. Although up to 60 cu cm (3.7 cu in.) of material was being lost from each vane, it only reduced the power-absorption capacity by a small amount. Analysis...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001340
EISBN: 978-1-62708-215-0
...Abstract Abstract Two identical “D” tube package boilers, installed at separate plants, experienced a number of tube ruptures after relatively short operating times. The tubes, which are joined by membranes, experienced localized bulging and circumferential cracking along the fireside crown...
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
...Abstract Abstract An investigation was conducted to better understand the time-dependent degradation of thermal barrier coated superalloy components in gas turbines. First-stage vanes are normally subjected to the highest gas velocities and temperatures during operation, and were thus the focus...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c0048303
EISBN: 978-1-62708-236-5
...)(20 + log t ) for SA-213, grade T-22. Source: Ref 1 . T °F + 460 = T °R To use Fig. 2 , the tube metal temperature and stress must be estimated. Service or operational time—113,000 h in this case—can be obtained from plant records. If chemical cleaning had been performed...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0047835
EISBN: 978-1-62708-217-4
... after being in operation for 138 h since the engine had been overhauled; total operating time was unknown. The rod was made from a 4337 steel (AMS 6412) forging and was quenched and tempered to 36 to 40 HRC. Investigation Visual examination disclosed that the rod had broken into two pieces...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001813
EISBN: 978-1-62708-241-9
... of the process. In the 1950s, the presence of graphitization was confirmed in 33.8% of 554 samples removed from pressure vessels and piping operating at high temperature [ 1 ]. The study made at that time associated statistically the presence of aluminum to the graphitization [ 2 ]. Although the literature...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0047975
EISBN: 978-1-62708-225-9
... and flaking damage in the raceways of the inner and outer rings. Total operating time for this bearing stack was 770 h. The origin of flaking in the raceway of the rotating inner ring was identified by the following distinguishing features ( Fig. 1a ). The origin (area in rectangle), oriented axially...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001714
EISBN: 978-1-62708-232-7
... months operation time after start-up, all C and D vertical pipes had to be removed because of metal dusting attacks. The pipes were replaced by HK 40 Modified alloy, that consists mainly of 28 % of Cr and 25% of Ni. Life time of these pipes extended to 3 years operation time. This year the pipes were...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001594
EISBN: 978-1-62708-229-7
... result in an “acute” failure where the joint fails in several hours or a “chronic” failure where the joint fails after several years. Systems that operate infrequently may fail after several years, but the total operating time may be only a few hours of operation, so these should be treated as “acute...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001024
EISBN: 978-1-62708-214-3
... operating time between loss of nitrogen pressure and failure, investigation of the time to failure in this accident (after about 1 h of flight) was of great interest. Because the BIM system indicators were supposed to be checked prior to every flight, one aspect of the investigation focused on the BIM...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001149
EISBN: 978-1-62708-232-7
... can be seen in background. The north furnace is a silicon metal furnace, the south is a ferrosilicon furnace. The ferrosilicon furnace was operated at increasing power levels for almost five months; at which time large cracks occurred at many locations on the south exhaust duct, creating...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001598
EISBN: 978-1-62708-232-7
... to pour. Fig. 1 Drawing of the CIM showing location of thermocouples and hole in drain tube The CIM was in service from November 1998 until June 1999. During that time the melter was cycled 134 times with 124 of the cycles at or above 1400 °C and 10 cycles at 1000 °C. Total operating time...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001747
EISBN: 978-1-62708-217-4
... , 6 , 7 , 8 , 9 , 10 are two other types of propeller blade fatigue failures. Both mainly result from propeller straightening operations, usually performed after previous blade bending damage. Fig. 5 Fatigue crack growth started at O; arrows indicate direction. Magnification 3 times...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001559
EISBN: 978-1-62708-229-7
... tracing cable were the only significant stresses acting on the pipe. SWEC estimated that the thermal stresses were tensile and above the threshold for SCC. Furthermore, it appeared impractical to exercise any further control over thermal stresses during future operation of the system. Residence Time...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006817
EISBN: 978-1-62708-329-4
... as “an occurrence associated with the operation of an airplane that takes place between the time any person boards the airplane with the intention of flight and such time as all such persons have disembarked, in which the airplane sustains serious damage, or death or serious injury results from (1) being in or upon...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003504
EISBN: 978-1-62708-180-1
... item(s) that may be affected by the failure On-condition task A scheduled task used to detect a potential failure One-time change Any action taken to change the physical configuration of an asset or system (redesign or modification), to change the method used by an operator or maintainer...