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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001663
EISBN: 978-1-62708-236-5
...Abstract Abstract Personnel responsible for laboratory protection at some plants are required to participate in exercises simulating a breach of security at the site. This document reports a metallurgical investigation of blank firing adapters (BFA), one of which exploded during such a training...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0048120
EISBN: 978-1-62708-225-9
...Abstract Abstract The pawl spring which was part of a selector switch used in telephone equipment failed. The springs were blanked from 0.4 mm (0.014 in.) thick tempered 1095 steel and then nickel plated. Numerous pits around the rivet holes were revealed by microscopic examination...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0048156
EISBN: 978-1-62708-235-8
...Abstract Abstract A 6150 flat spring was found to be failed. The face of the spring was revealed to be under tensile stress. The failure was concluded to have begun at the dark spot on the edge where roughness resulted from shearing during the blanking operation. Blanking Roghness...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001302
EISBN: 978-1-62708-215-0
... grew and coalesced during service. Consideration of the manufacturing process suggested that the cracks were the result of overheating of the kingpin blanks prior to forging, which was exacerbated during forging by deformation heating in the highly-strained region. This view was supported by results...
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
... of the CaO was determined to be slag entrapment during the steel making process. It was recommended that the thermowell blanks be ultrasonically tested prior to machining and that the design be modified to make internal pressurization possible. Leakage Nonmetallic inclusions Nuclear reactor...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c0091538
EISBN: 978-1-62708-233-4
...Abstract Abstract Electrical contact-finger retainers blanked and formed from annealed copper alloy C65500 (high-silicon bronze A) failed prematurely by cracking while in service in switchgear aboard seagoing vessels. In this service they were sheltered from the weather but subject to indirect...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001576
EISBN: 978-1-62708-219-8
... casing ( Fig. 1 ). The rated rotation speed is 1, 750 rpm. Blades are of the shape as shown in Fig. 2(a) and are blanked from coldrolled steel sheet. As shown in Fig. 3 , both ends of the blade are inserted into the slits provided on the disk or the ring. Fig. 1 Multi blade Fan Fig. 2...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0009222
EISBN: 978-1-62708-180-1
.... Design must take into account the equipment available for heat treatment and for subsequent grinding. The designer must also correctly evaluate service conditions. For example, a blanking die for making paper gaskets may not be satisfactory for producing steel blanks of the same size. Handbooks list...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0047165
EISBN: 978-1-62708-217-4
... half had chromic acid stains, it was obvious that the forging defect was open to the surface during anodizing. The forging defects may have been the result of any of the following factors, singly or in combination: The forging blank contained more than the optimum volume of metal...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001752
EISBN: 978-1-62708-241-9
... to 100% b nd—not detected Small archived billet samples of the AMS 6414 steel heat for the LF14 crankshaft forging blanks were heat-treated and CVN impact-tested. No PDF features were found on these fracture surfaces. The ASTM 3.0–3.5 prior Austenite grain sizes of these billets were...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001077
EISBN: 978-1-62708-214-3
... that the defect had extended across an area encompassing both teeth in the forging blank. Serial sectioning of the chip showed the defective region to be quite wide, extending approximately 10 mm (0.4 in.) along the length of the chip in a layer at least 0.2 mm (0.008 in.) thick. Fig. 5 Cross section...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0048261
EISBN: 978-1-62708-225-9
... fillets as a result of through hardening. Dimensions given in inches The ring gear, machined from a forged blank made of 4817 steel, had been gas carburized at 925 °C (1700 °F), cooled to 815 °C (1500 °F), press quenched in oil at 60 °C (140 °F), then tempered at 175 °C (350 °F) for 1 1 2...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c9001173
EISBN: 978-1-62708-218-1
... for removing the blanking copper. Clearly, if this operation was carried out prior to the tempering, then the tempering operation would drive out the hydrogen thereby avoiding embrittlement problems no matter how quickly the ball joints are put into service after manufacture. The reason why previous samples...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001360
EISBN: 978-1-62708-215-0
... greatly reduces the ductility of the steel and increases its notch sensitivity. After the stainless steel strip is roller to extra full hard temper, the blades are blanked and the rivet holes are pierced. The blades are then lightly rolled to impart a slight curvature. Finally, the blades are stress...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003507
EISBN: 978-1-62708-180-1
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001601
EISBN: 978-1-62708-235-8
..., may represent the ultimate in reliability. 2 A metal blank or preform is formed over a rotating mandrel. The metal blank and the mandrel (which are locked together) rotate, and the forming roller follows the mandrel at a preset that has been programmed into a CNC flow forming machine. The preform...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001814
EISBN: 978-1-62708-180-1
... service life. Figure 25(a) shows a chromium-plated blanking die made from AISI A2 tool steel that cracked after limited service. Cold etching ofa disk cut from the blanking die revealed a light-etching layer that is particularly prominent at the working face and along the adjacent sides ( Fig. 25b...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001813
EISBN: 978-1-62708-180-1
... during the blanking operation. On the fracture surface at the left, rays approximately 0.18 mm (0.007 in.) below the surface can be seen diverging from the origin. Four broken springs were sent to the metallurgical laboratory to determine the cause of fracture. Three new springs from stock and six...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001022
EISBN: 978-1-62708-214-3
... after cleaning, showing cracks in greater detail. ∼0.94×. Part 2 had been reprocessed. Subsequent ultrasonic testing showed that it contained a large circumferential crack, fluorescent penetrant did not reveal the crack, because it had been effectively covered and blanked off with chromate paint...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c0048795
EISBN: 978-1-62708-220-4
... of water, at which time it was blanked off. The specified hydrostatic proof test called for a pressure of 48 MPa (6.95 ksi) at an ambient temperature of not less than 7 °C (45 °F). At 34 MPa (5.0 ksi), the customary halt was made, and about 30 s later, the flange end of the vessel exploded without...