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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c9001229
EISBN: 978-1-62708-223-5
... Abstract Two slitting saw blades were delivered for the purpose of determining the cause of damage. One had cracked while the other one came from a prior sheet delivery, that had less tendency to crack formation according to the manufacturer. The blades were supposed to have been stamped out...
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Published: 01 June 2019
Fig. 1 Defective saw blade with cracks at base of teeth (arrows). Lateral views. Surface etched with Nital. 3× More
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Published: 01 June 2019
Fig. 4 Defective saw blade. Peripheral microstructure in chrome plated cutting edge. Transverse section, unetched. 500× More
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Published: 01 June 2019
Fig. 6 Transition structure under tooth backings of defective saw blade. Transverse section, etch: Nital. 500× More
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Published: 01 June 2019
Fig. 7 Heat treated microstructure of saw blades, transverse section, etch: Nital. 500× More
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Published: 01 June 2019
Fig. 7 Fracture in the retaining nut. Note that there was a saw cut made to the left of the fracture prior to the photograph being taken. The section is 32 mm × 32mm More
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Published: 01 June 2019
Fig. 1 Location of failure showing saw tooth form of fatigue crack. More
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Published: 01 December 1992
Fig. 2 Saw cut anchor bolt, showing fracture at end of severe bend region. More
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Published: 01 December 1992
Fig. 5 Fracture surface of longleg of saw cut anchor bolt, showing narrow shear lip and gray thumbnail regions. More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001430
EISBN: 978-1-62708-236-5
... Abstract An intermediate shaft (3 in. diam), part of a camshaft drive on a large diesel engine, broke after two weeks of service. Failure occurred at the end of the taper portion adjacent to the screwed thread. The irregular saw-tooth form of fracture was characteristic of failure from...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c0047432
EISBN: 978-1-62708-224-2
... with beach marks, indicating fatigue cracking. The beach marks emanated from a 6.4 mm (1/4 in.) wide band of unusual appearance running across the center of the fracture. Saw cuts were made perpendicular to both of the fracture surfaces and across the unusual-looking bands. The cut surfaces were ground...
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Published: 01 December 1993
Fig. 5 Surface of a portion of an opened circumferential crack. P, plasma-cut surface (created by removal of the sample by sawing); R, ratchet mark More
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Published: 01 January 2002
Fig. 25 Machining flaw as fracture origin in glass. Rough surface is the bottom of a groove cut by a diamond saw. SEM; picture width ∼200 μm. Source: Ref 9 More
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Published: 01 January 2002
Fig. 11 Fracture surface of a porcelain insulator, which broke during cutting with a diamond saw. Fracture moved from right to left. Mist and velocity hackle and Wallner lines are readily seen in this fine-grained material. Camera image; picture width ∼20 mm. Source: Ref 3 More
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Published: 01 June 2019
. Dimensions given in inches, (b) Light fractograph showing fracture origins at corrosion pits (arrows O) and direction of fast fracture (arrows R). 4 1 2 x. Region where crack was opened in the laboratory, by sawing and then breaking by hand, is shown at upper right corner. More
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
... offcenter. Then he cut into the surface for about 1 4 in. and saw that the crack did not diminish appreciably. Attempting to open the crack further, the machinist struck the small end of the shaft. The shaft broke in two — but not at the crack! The break was 1 2 in. away, as shown...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001442
EISBN: 978-1-62708-221-1
... in the throughthickness direction; saw-cuts parallel to the surfaces were made along the ends of strips cut from the back plate, into which a chisel was inserted in order to try to split the plate. No pronounced weakness in this direction was revealed, the two portions of the plate bending at the end of the saw-cuts...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0048791
EISBN: 978-1-62708-234-1
... cross was visually inspected. It consisted of about a 180-mm (7-in.) square that had a maximum thickness of 60 mm (2.37 in.). It included a weld-preparation area that was about 16 mm (0.625 in.) thick. One side of the specimen had been flame cut, while the other had been sawed. The outside surface...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c0047423
EISBN: 978-1-62708-236-5
... of final failure a fatigue crack had grown through about one-third of the cross section ( Fig. 1 ). A secondary fatigue crack, perpendicular to the main fracture, was also observed. Fig. 1 Stereo pair showing fracture surface of cast dragline shackle. See also Fig. 2 . A saw cut was made...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c9001704
EISBN: 978-1-62708-218-1
... girth welds contained intermittent areas of reddish-brown deposits and pitting ( Figure 2 ). Other areas of the welds appeared unaffected. Fig. 2 Typical appearance of exterior corrosion deposits An access port was removed from the side of the tank using a gas-powered abrasive saw so...