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Shafts (power)

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001620
EISBN: 978-1-62708-229-7
... shaft. It was suggested that the surfaces be securely clamped together and that an in-service maintenance program be initiated to ensure that the tightness of the clamping bolts was verified regularly. Fretting fatigue Pulverized coal Shafts (power) 4340 UNS G43400 Transgranular fracture...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001764
EISBN: 978-1-62708-241-9
... and 19.10 ksi) per 1356 N-m (1000 ft-lbf) torque. Using b = −0.14 and S u = 650 MPa (94.3 ksi) (based on the measured material hardness), Fig. 14 shows the ratio of Design 1 life to Design 6 life as a function of the mean applied torque. Assuming that the power transmitted by the drive shaft is...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001368
EISBN: 978-1-62708-215-0
... Hydroelectric generators Shafts (power) Turbines 4140 UNS G41400 Fatigue fracture A steel shaft that connected two runners in a hydroturbine failed catastrophically after approximately 5900 h of service over 27 months. The fracture occurred at the transition between the 230 mm...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001792
EISBN: 978-1-62708-241-9
... Abstract Two shafts that transmit power from the engine to the propeller of a container ship failed after a short time in service. The shafts usually have a 25 year lifetime, but the two in question failed after only a few years. One of the shafts, which carries power from a gearbox to the...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0047813
EISBN: 978-1-62708-229-7
... Abstract After being in service for ten years the ball-and-race coal pulverizer was investigated after noises were noted in it. Its lower grinding ring was attached to the 6150 normalized steel outer main shaft while the upper grinding ring was suspended by springs from a spider attached to the...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001353
EISBN: 978-1-62708-215-0
... Abstract A reversible four-way carbon steel flap valve in a thermal power station failed after 7 years of service. The flap had been fabricated by welding two carbon steel plates to both sides of a carbon steel forging. The valve was used for reversing the flow direction of seawater in the...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001023
EISBN: 978-1-62708-214-3
...-power microscope examination of the spline of the shaft showed evidence of fretting wear debris; similar wear was observed on the splines of the mating bevel gear. It was concluded that the splines had failed by severe fretting wear. Fretting damage was also observed on the shaft face adjacent to the...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c0047100
EISBN: 978-1-62708-233-4
... fatigue cracks. Plungers Shafts (power) Stress concentration 4150 UNS G41500 Fatigue fracture Plunger shafts machined from 4150 steel bar stock were involved in a series of fatigue failures. The fractures consistently occurred at two different locations on the shafts–the shaft fillet (arrow...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001763
EISBN: 978-1-62708-241-9
... backward movement of the ATV. The shaft assembly consists of a pinion gear and a multijawed coupling that are secured to the shaft with multispline teeth, rather than a single key. This assembly provides the capability for power transmission. With a straight-sided profile, the root of the spline tooth also...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001370
EISBN: 978-1-62708-215-0
... included use of a case-hardened En 8 steel with the correct composition and regular maintenance of the pump. Cooling systems Nuclear reactors Shafts (power) Water cooling EN8 Fatigue fracture Corrosion fatigue After 7 years of operation, a service water pump in a nuclear...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001287
EISBN: 978-1-62708-215-0
...-hardening treatment be used. The provision of a stop to reduce bending stresses was also recommended. Extruders Shafts (power) UNS G10220 1022 EN3 Fatigue fracture A piston shaft on the billet-loading tray of an extrusion press experienced recurring failure. The shaft, which...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001799
EISBN: 978-1-62708-241-9
... transfer of material. gear shaft fatigue fracture seizing high-strength low-alloy steel scoring marks deformed grains uniaxial fatigue testing macrofeatures 4145 (high-strength low-alloy steel) UNS G41450 High-strength low-alloy steels are used for power transmission...
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
... torsional shear. Gas turbines Shafts (power) Torsional fatigue 4140 UNS G41400 Fatigue fracture A steel turbine impeller shaft fractured after 2 months of service. Failure had taken place at the keyed end of the shaft through the keyways. Figure 1 shows the shaft...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001371
EISBN: 978-1-62708-215-0
... Abstract A type 410 stainless steel circulating water pump shaft used in a fossil power steam generation plant failed after more than 7 years of service. Visual examination showed the fracture surface to be coated with a thick, spalling, rust-colored scale, along with evidence of pitting...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001369
EISBN: 978-1-62708-215-0
... the manufacturer and a replacement requested. Case depth Chipping Shafts (power) EN36A (Other, general, or unspecified) fracture Spalling wear A crane long-travel worm drive shaft was found to be chipped during unpacking after delivery. On arrival, the keyway was...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001118
EISBN: 978-1-62708-214-3
... Abstract Failure of AISI type 321 stainless steel internal springs from newly manufactured lip seals on a shaft between a turbine power unit and a pump in a commercial aircraft secondary unit was investigated. Examination of the coils from two failed springs showed that both had failed by...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001536
EISBN: 978-1-62708-229-7
... cracking (IGSCC) Nuclear power plants Nuclear reactor coolant piping Nuclear Pump seal wear rings Pump shaft cracking Stress corrosion cracking 304 UNS S30400 Cemented carbide Stress-corrosion cracking Dealloying/selective leaching Approximately 113 nuclear electrical power...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001478
EISBN: 978-1-62708-220-4
... penetration by molten copper may have played a role, but no evidence was seen. An absence of chromium plating at the region of the heat-affected zone was also observed but could not be explained. Unfortunately, the end portion of the shaft was not available for examination. Overheating Shafts (power...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001786
EISBN: 978-1-62708-241-9
... zone. Fig. 9 Fractographs from the rubbed zone of the fracture surface The torque transmitted by main motor is calculated from the power rating of motor. Motor power P = 30 kw. Motor speed N m = 1440 rpm. Spline shaft speed N s = 384 rpm. Power P = torque...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c9001467
EISBN: 978-1-62708-224-2
... Radii Shafts (power) Stress concentration Mild steel Fatigue fracture This case describes the failure of a shaft which carried the diverter sheave wheel of an electric goods lift resulting in the cage failing to the bottom of the well causing injury to two persons. The shaft, 2 3 8 in...