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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.marine.c9001511
EISBN: 978-1-62708-227-3
... of the shaft. In the case of this shaft, a solution would have been to machine the core of the shaft to remove the brittle material or to use a tubular shaft. Forgings Shafts (power) Tankers (waterborne) Ultrasonic testing Low-carbon steel Fatigue fracture An LNG tanker experienced a fracture...
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
... by torsional shear. Gas turbines Shafts (power) Torsional fatigue 4140 UNS G41400 Fatigue fracture Background A steel turbine impeller shaft fractured after 2 months of service. Applications The shaft was part of the impeller system of a gas turbine and, owing to the manner in which...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0046205
EISBN: 978-1-62708-225-9
... (power) Stress concentration Surface defects 1040 UNS G10400 Fatigue fracture The splined shaft shown in Fig. 1 was from a front-end loader used in a salt-handling area. The shaft broke after having been in service approximately 2 weeks while operating at temperatures near -18 °C (0 °F...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001904
EISBN: 978-1-62708-217-4
... components Alignment Bolts Fatigue life Helicopters Magnetic particle testing Shafts (power) 18Ni Steel eyebolt Corrosion fatigue Pitting corrosion The first of two examples demonstrating failures caused by corrosion concerns a steel eyebolt which failed by fatigue ( Figs. 1 , 2 , 3...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001468
EISBN: 978-1-62708-221-1
... were found in all the shafts. Timely replacement was possible and the likelihood of serious accidents removed. Shafts (power) Ultrasonic testing Fe-0.3C Fatigue fracture This case concerns the failure of a shaft which resulted from reversed torsional stresses. The effect of this different...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0047161
EISBN: 978-1-62708-235-8
... environment, such a surface flaw can become the initiating site for a fatigue crack or a corrosion-related failure. Cracking (fracturing) Forgings Seams Shafts (power) Surface defects 4130 UNS G41300 Metalworking-related failures Routine magnetic-particle inspection revealed crack...
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
... that 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
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001435
EISBN: 978-1-62708-236-5
... inclusions Shafts (power) Slags Weld defects Weld deposited coatings Welded steel Joining-related failures Fatigue fracture The fracture of the shaft of a 10 h.p. squirrel-cage motor took place at the driving end just outside the roller bearing and not at an abrupt change of section behind...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c0047212
EISBN: 978-1-62708-221-1
... to fracture. No evidence of a defective design, improper microstructure, high inclusion count, or other stress-raising condition was observed. No recommendations were made. Earthmoving equipment Plastic deformation Shafts (power) 4340 UNS G43400 Fatigue fracture A steering knuckle used...
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
... (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. dia. × 20...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0089774
EISBN: 978-1-62708-235-8
... welds Residual stress Shafts (power) Supports Undercutting Welded joints 1040 UNS G10400 Fatigue fracture An amusement ride in a shopping center failed when a component in the ride parted, permitting it to fly apart. The ride consisted of a central shaft supporting a spider of three arms...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0091096
EISBN: 978-1-62708-234-1
... groove in the shaft had performed its function, but at a lower overload level than intended. Recommendations included increasing the fatigue strength of the shaft by shot peening the shear groove to minimize chatter. Shafts (power) Shot peening Torsional fatigue 4340 UNS G43400 Fatigue...
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
... of 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...
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
... to the manufacturer and a replacement requested. Case depth Chipping Shafts (power) EN36A (Other, general, or unspecified) fracture Spalling wear Background A crane long-travel worm drive shaft was found to be chipped during unpacking after delivery. Pertinent Specifications The steel...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c0059932
EISBN: 978-1-62708-236-5
... that the flaw signals were false and had happened when a portion of the beam struck the oily surface of the longitudinal oil hole. The problem was solved by removing the oil film from the longitudinal oil hole. Shafts (power) Ultrasonic testing Upset forgings 4118 UNS G41180 (Other, general...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001644
EISBN: 978-1-62708-219-8
... crack predated the single overload crack. Blades Fans Shafts (power) Structural steel Fatigue fracture In this situation, a large fan assembly deformed and broke at multiple locations. The client wanted to know whether the bearing pillow block ( Fig. 1 ) fracture had caused the actual fan...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001730
EISBN: 978-1-62708-229-7
... (power) Torsional fatigue 6150 UNS G61500 Fatigue fracture A unique failure developed in the central shaft of a coal pulverizer at our plant. A crack appeared in the shaft at one place and then welded by friction around the circumference while the pulverizer continued to operate. Then another...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0046870
EISBN: 978-1-62708-217-4
...) was recommended as a standard maintenance procedure for shafts with long service lives. Aircraft components Shafts (power) Torsional fatigue AMS 6415 UNS G43400 Pitting corrosion Corrosion fatigue The hollow, splined alloy steel aircraft shaft shown in Fig. 1 cracked in service after more than...
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
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001436
EISBN: 978-1-62708-235-8
... that if the built-up zone had extended beyond the oil seal groove, failure in the manner would not have occurred. Experience indicated however, that failure from fatigue cracking would still have been likely to occur. Shafts (power) Weld defects Weld metal Carbon steel Joining-related failures Brittle...