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Image
in Problematic Failure Analysis of a Cast Steel Crankshaft[1]
> ASM Failure Analysis Case Histories: Improper Maintenance, Repair, and Operating Conditions
Published: 01 June 2019
Fig. 13 A drilled hole with tool marking that was altered by the woody textured fracture plane
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in Defective Welded Derrick Crane Anchorage Nuts
> ASM Failure Analysis Case Histories: Construction, Mining, and Agricultural Equipment
Published: 01 June 2019
Fig. 1 Annular marking on face of nut.
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in Delayed Fracture of Tempered Glass Panels Due to Nickel Sulfide Inclusions
> Handbook of Case Histories in Failure Analysis
Published: 01 December 1992
Fig. 3 Faint semicircular marking on fracture surface around inclusion.
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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0048139
EISBN: 978-1-62708-225-9
... and tool marks were revealed on the inner surface of the broken spring. A typical fatigue fracture that originated at a tool mark on the wire surface was revealed by inspection of a fracture surface of the broken springs. Regions which displayed beach marks around the fracture origin and parallel...
Abstract
The conical helical spring sealed, within each switch enclosure, fractured to lead to the failure of several electrical toggle switches. The spring was fabricated from 0.43 mm diam AISI type 302 stainless steel wires. Appreciable amount of scale was observed on the fracture surface and tool marks were revealed on the inner surface of the broken spring. A typical fatigue fracture that originated at a tool mark on the wire surface was revealed by inspection of a fracture surface of the broken springs. Regions which displayed beach marks around the fracture origin and parallel striations within the beach-mark regions were revealed by scanning electron microscopy. As a corrective measure, the spring-winding operation was altered to eliminate the tool marks.
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0048134
EISBN: 978-1-62708-235-8
..., in the horizontal and vertical planes during the testing. The fracture was revealed to have occurred in bend 2. An indentation, presumably caused by the bending tool during forming, at the inner surface of the bend where fracture occurred was revealed by microscopic examination. Spiral marks produced on springs...
Abstract
A copper alloy C51000 (phosphor bronze, 5%A) failed prematurely during life testing of several such springs. The wire used for the springs was 0.46 mm (0.018 in.) in diam and was in the spring-temper condition. The springs were revealed to be subjected to cyclic loading, in the horizontal and vertical planes during the testing. The fracture was revealed to have occurred in bend 2. An indentation, presumably caused by the bending tool during forming, at the inner surface of the bend where fracture occurred was revealed by microscopic examination. Spiral marks produced on springs during rotary straightening were observed. A crack that had originated at the surface at the inside bend and had propagated toward the outside of the bend was revealed by microscopy of a longitudinal section taken through bend 2. The small bend radius was interpreted to contribute to spring fatigue as a result of result in straining at the bend zone. The spring was concluded to have failed in fatigue. It was recommended that the springs should be made of wire free from straightener marks and the bending tool should be redesigned so as not to indent the wire.
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in Failure of a Stainless Steel Power Boiler Steam Desuperheater
> ASM Failure Analysis Case Histories: Power Generating Equipment
Published: 01 June 2019
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in Fatigue Failure of a Steering Spindle on a Tricycle Agricultural Field Chemical Applicator
> Handbook of Case Histories in Failure Analysis
Published: 01 December 1992
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in Caustic Corrosion Failure of Back Wall Riser Tube in a High-Pressure Boiler
> Handbook of Case Histories in Failure Analysis
Published: 01 December 2019
Fig. 1 Photograph of riser boiler tube in as received condition. Punch marks marked as 5, 6, and 7 on the side facing the furnace can be seen
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in Caustic Corrosion Failure of Back Wall Riser Tube in a High-Pressure Boiler
> Handbook of Case Histories in Failure Analysis
Published: 01 December 2019
Book Chapter
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c0048073
EISBN: 978-1-62708-224-2
... Abstract A drum pinion shaft (1030 steel) which was part of the hoisting gear of a crane (capacity 18,140-kg) operating in a blooming mill failed while lifting a 9070 kg load. Chatter marks, rough-machining marks, and sharp corner radii were revealed in the keyway which extended into a shoulder...
Abstract
A drum pinion shaft (1030 steel) which was part of the hoisting gear of a crane (capacity 18,140-kg) operating in a blooming mill failed while lifting a 9070 kg load. Chatter marks, rough-machining marks, and sharp corner radii were revealed in the keyway which extended into a shoulder at a change in diam. A circular recess below the keyway surface was revealed at each end of the keyway. A sharp corner at the end of the keyway was revealed by examination to be the origin of fracture. Beach marks were found radiating from the origin over a large portion of the fracture surface which confirmed failure of the shaft by fatigue fracture. As a corrective measure the shaft was replaced with one made of 4140 steel, quenched and tempered to a hardness of 286 to 319 HRB. The keyway was moved away from the change in section and was machined with a 1.6-mm radius in the bottom corners and a larger-radius fillet was machined at the change in section.
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in Inspection and Analysis of Aluminium Racks in Spent Fuel Storage Basins
> ASM Failure Analysis Case Histories: Power Generating Equipment
Published: 01 June 2019
Fig. 1 Mark 22 assembly in K-basin VTS
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in Laser Surface Mapping of a Canister Closure Weld
> ASM Failure Analysis Case Histories: Power Generating Equipment
Published: 01 June 2019
Fig. 9 Weld hole, section 2 (arrow marks section of weld that did not fuse to the plug)
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in The Corrosion of Aluminum-Clad Nuclear Fuel in Wet Basin Storage
> ASM Failure Analysis Case Histories: Power Generating Equipment
Published: 01 June 2019
Fig. 1 Mark 22 in K-Reactor basin storage
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in The Corrosion of Aluminum-Clad Nuclear Fuel in Wet Basin Storage
> ASM Failure Analysis Case Histories: Power Generating Equipment
Published: 01 June 2019
Fig. 2 Mark 31A target slugs in L-basin storage
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in The Corrosion of Aluminum-Clad Nuclear Fuel in Wet Basin Storage
> ASM Failure Analysis Case Histories: Power Generating Equipment
Published: 01 June 2019
Fig. 5 Mark 31A inner and outer slugs
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Published: 01 June 2019
Fig. 3 Photograph of Fractured Surface. Note indistinct chevron markings in midsection, pointing upward. Dimensions: 1 1 4 in. thick, 1 5 8 in. high
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in Failure of a Stainless Steel Power Boiler Steam Desuperheater
> ASM Failure Analysis Case Histories: Power Generating Equipment
Published: 01 June 2019
Fig. 2 Fracture surface showing beach marks representative of crack fronts.
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Published: 01 June 2019
Fig. 8 (a) Showing beach marks characteristics of fatigue failure. (b) Coarse fatigue striation “tyre track” markings (1000×).
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in Cause and Prevention of Fatigue Failures in Boiler Tubing
> ASM Failure Analysis Case Histories: Power Generating Equipment
Published: 01 June 2019
Fig. 12 Superheater Failure - Note flat oxidized surface with ratchet marks (arrows).
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in Breakage of Main Undercarriage Axle of Landing Gear System of an Aircraft Under Simulated Testing
> ASM Failure Analysis Case Histories: Air and Spacecraft
Published: 01 June 2019
Fig. 2 Crescent shaped envelope with coarse brittle fracture and `ratchet' marks at × 2
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