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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c0048250
EISBN: 978-1-62708-236-5
...Abstract Abstract A farm-silo hoist used as the power source for a homemade barn elevator failed catastrophically from destructive wear of the worm. The hoist mechanism consisted of a pulley attached by a shaft to a worm that, in turn, engaged and drove a worm gear mounted directly on the hoist...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0006900
EISBN: 978-1-62708-225-9
... of MoS 2 lubricant for 5 days One of the half-hard type 301 specimens that was MoS 2 treated and charged with hydrogen from an outside power source cracked after 5 days. All the other half-hard 301 specimens showed cracks after hydrogen charging regardless of the presence of M0S2 or the method...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0048708
EISBN: 978-1-62708-229-7
...Abstract Abstract The horizontal heat-exchanger tubes made of copper alloy C70600, in one of two hydraulic-oil coolers in an electric power plant, leaked after 18 months of service. River water was used as the coolant in the heat-exchanger tubes. Several nodules on the inner surface and holes...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001507
EISBN: 978-1-62708-217-4
...Abstract Abstract A large four-engine aircraft was on a cargo flight at night when a loud bang was heard, accompanied by a loss of power from both engines on the left side. After an emergency landing, it was discovered that the propellers from both left side engines were missing. The initial...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001326
EISBN: 978-1-62708-215-0
...Abstract Abstract Pressure testing of a batch of AISI type 316L stainless steel thermowells intended for use in a nuclear power-plant resulted in the identification of leakage at the tips in 20% of the parts. Radiography at the tip region of representative thermowells showed linear indications...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001091
EISBN: 978-1-62708-214-3
... analysis indicated that the mechanism of fracture initiation was torsional fatigue. Intermittent deceleration and acceleration resulting from power surges during operation of the turbine caused torsional vibration and was considered the most probable source of the required cyclic stress. Final failure took...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003549
EISBN: 978-1-62708-180-1
... Fig. 1 Corrosion characteristics of an active-passive metal as a function of solution oxidizing power (electrode potential) Fig. 4 Corrosion failure of 100-year-old riveted steel water transmission main. Courtesy of S. Paul, CorrTech, Inc. Fig. 6 Severely deteriorated...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006782
EISBN: 978-1-62708-295-2
... of how design affects local corrosion. Impressed-current protection requires buried anodes and an electrical connection between the protected structure and the current source. A power rectifier supplies direct current to the buried electrodes (the structure and the anode). The direct-current source...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006796
EISBN: 978-1-62708-295-2
... and that in Fig. 2(d) corresponds to the acceleration stage. Fig. 2 Erosion model. (a–c) Incubation stage. (d) Acceleration stage. Source: Ref 29 In predicting the lifetime of pipe-wall thinning of nuclear/fossil power plants, the erosion rate is an important factor to be considered. Therefore...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006764
EISBN: 978-1-62708-295-2
..., films, nonmetals, composites, assemblies Acoustic emission (AE) Multiple distributed sensors detect and triangulate AE stress-wave source in response to mechanical or thermal stress. Corrosion, stress-corrosion cracking, weld cracking, creep and fatigue cracking Sensitive to noise and vibration...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0060144
EISBN: 978-1-62708-234-1
...Abstract Abstract Two steam-methane reformer furnaces were subjected to short-time heat excursions because of a power outage, which resulted in creep bulging in the Incoloy 800 outlet pigtails, requiring complete replacement. Each furnace had three cells, consisting of 112 vertical tubes per...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0090881
EISBN: 978-1-62708-229-7
...Abstract Abstract A power plant using two steam generators (vertical U-tube and shell heat exchangers, approximately 21 m (68 ft) high with a steam drum diameter of 6 m (20 ft)) experienced a steam generator tube rupture. Each steam generator contained 11,012 Inconel alloy 600 (nickel-base...
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
... and Incoloy 800H in molten 34.42wt%NaCl-5.58wt%LiCl at 650 and 700 °C (1200 and 1290 °F) under nitrogen. Corrosion increases with increasing temperature. Source: Ref 77 Fig. 19 Schematic of nominal design of concentrating solar power system using molten salts. Solar energy is concentrated...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c9001578
EISBN: 978-1-62708-233-4
... the source of the problem, vibration levels were measured on the top of the microscope's isolator and on the structural steel supporting the isolator. It was discovered that the levels on the isolator were 7× higher than the levels on the steel support. This meant that instead of isolating the microscope...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001815
EISBN: 978-1-62708-180-1
... gears, helical gears generate axial thrust, which causes slight loss of power and requires thrust bearings. Fig. 2 Sections of a helical gear (a) and a helical rack (b). Herringbone Gears Herringbone gears ( Fig. 3a ), sometimes called double helical gears, are used to transmit motion...
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
... reduction in throttle flow is due to reduced power requirements during some portions of service duty cycle. However, these fluctuations are shown to have negligible effect on the magnitude of the stresses. Source: Ref 14 Fig. 4 Effective temperature in a TMF cycle as a function of the maximum...
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
...Abstract Abstract A transition duct was part of a 100-MW power-generation gas turbine. The duct was fabricated from several panels of a modified nickel alloy, IN-617. After six years of operation, two such ducts failed during the next two years, causing outages. Failure was in the form...
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
... scales. Most Probable Cause Remedial Action This particular set of nozzles had operated for 12,000 to 14,000 h. The damaged nozzles were found during an inspection for possible causes of significant power deterioration over the period of a year. Most of the power degradation appeared...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001826
EISBN: 978-1-62708-241-9
... and Correction of Boiler Tube Failures , EPRI. Electric Power Research Institute , Palo Alto, CA ( 1985 ) 2. Cotton I.J. : Refinery boiler feed water systems: corrosion and control . Mater. Perform. 6 , 46 ( 2000 ) 3. Port R.D. , Herro H.M. : The NALCO Guide to Boiler Failure...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001110
EISBN: 978-1-62708-214-3
...Abstract Abstract A 44.5 mm (1.75 in.) diam type 321 stainless steel seamless tube in a power-generating turbine failed after 19,000 h in service. The tube was used to carry a mixture of approximately 25% steam and 75% hot air. Three fractured pieces and part of the tube containing the mating...