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Image
Published: 01 December 2019
Fig. 13 Close up of stent shape when resonance occurs at a natural frequency of 140.0 kHz More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001524
EISBN: 978-1-62708-221-1
... Abstract A 140 ft. (42.7 m) long boom on a dragline crane used in coal strip-mining operations failed. One of the principal load-bearing longitudinal beams or chords of the trussed boom had fractured adjacent to a bolt hole at a location about halfway along the length of the boom. Over...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001619
EISBN: 978-1-62708-225-9
... of approximately 140 mm (5.5 in.) in the unsplined section and was made of 4340 Ni-Cr-Mo alloy steel heat treated to a uniform hardness of HRC 31. Cracks from at least seven different origins had coalesced to produce the single large crack that resulted in failure. The origins of these cracks were on the flanks...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c0046160
EISBN: 978-1-62708-224-2
.... Axial shift of the crane wheel during operation, because of insufficient interference fit, was the major cause of fatigue cracking. Recommendations included redesigning the axle to increase the critical diameter from 140 to 150 mm (5.5 to 6 in.) and to add a narrow shoulder to keep the drive wheel from...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0091402
EISBN: 978-1-62708-234-1
... C (50 to 60 deg F) and outlet temperature was 50 to 60 deg C (120 to 140 deg F). The pH of the water was 6.9. Investigation (visual inspection, chemical analysis, and 67x nital etched micrographs) supported the conclusion that the elbows had been given the usual annealing and normalizing treatment...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.pulp.c0089682
EISBN: 978-1-62708-230-3
... Abstract A neck fitting (cast equivalent of AISI type 317) exhibited extreme corrosion with large, deeply pitted areas. It had been in service in a sulfite digester at 140 deg C (285 deg F) and 689 kPa (100 psi). The liquor was calcium bisulfite, and chloride content was reported to be low...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001094
EISBN: 978-1-62708-214-3
... of acceptable performance for the intended application. It was recommended that use of the 410 screws be discontinued in preference to the case-hardened carbon steel screws. Skyscrapers Steel construction 140 UNS S41000 Hydrogen damage and embrittlement Intergranular fracture Background...
Image
Published: 01 June 2019
) Micrograph of an etched (Keller's reagent) section through surface of initial fracture showing branched cracking. 140×. More
Image
Published: 01 January 2002
) Micrograph of an etched (Keller's reagent) section through surface of initial fracture showing branched cracking. 140×. More
Image
Published: 01 January 2002
with HCl-methanol. 140×. (b) Fatigue crack initiated by an intergranular underbead crack (arrow). Note beach marks in fatigue region. 3× More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001400
EISBN: 978-1-62708-235-8
... 127 −22 140 122 −18 HAZ 161 150 −11 140 140 0 3 8 in. from Weld (a) 133 132 −1 Plate Material (C) General 155 131 −24 141 130 −11 HAZ 154 138 −16 149 135 −14 3 8 in. from Weld (a) 140 124 −16 (a) corresponding...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0089459
EISBN: 978-1-62708-235-8
... failed rods, no significant imperfections or evidence of damage were found by visual examination. Surface hardness of the four rods, as measured at various points with a Rockwell tester, was equivalent to 140 HB— substantially lower than the specified hardness of 160 to 205 HB. The fractures...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001841
EISBN: 978-1-62708-241-9
... of the fracture surface and revealed a fatigue-related failure. However, the source of the cyclic stress was unclear. It was noted that prior to crimping, an ultrasonic cleaning procedure had been employed. The ultrasonic cleaner was known to operate at approximately 140 kHz. An FEA eigenmode analysis...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001282
EISBN: 978-1-62708-215-0
..., and water at 60 °C (140 °F) for 20 min and passivated in a solution of 10 to 20% HNO 3 and water at 60 °C (140 °F) for 30 min ( Ref 1 ). Soon after the surface treatment, component B developed severe pitting attack on both the inside and outside surfaces, but no pitting occurred on the cross-sectional...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001056
EISBN: 978-1-62708-214-3
... with variations in moderator flow, which allow thermal fatigue to be induced. Stratification is caused by the ingress of relatively cold (140 °C, or 285 °F) heavy water from the moderator circuit into the primary cooling circuit, the temperature of which is 280 °C (535 °F) ( Fig. 1 ). This “cold plug...
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.modes.c0047010
EISBN: 978-1-62708-234-1
... 586 85 531 77 Udimet 630 1 993 144 1000 145 5 965 140 965 140 10 979 142 972 141 25 1013 147 979 142 René 41 1 683 99 696 101 5 724 105 690 100 10 690 100 655 95 25 703 102 703 102 Ductility of mortar-tube alloys at 595 °C...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0091678
EISBN: 978-1-62708-217-4
... (Keller's reagent) section through surface of initial fracture showing branched cracking. 140×. A metallographic section through the initial fracture displayed intergranular branched cracking that had originated at the fracture surface, which was also intergranular ( Fig. 1b ). The bolt from...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001090
EISBN: 978-1-62708-214-3
... failed after 48 h of service with internal water pressure ranging from 140 to 550 kPa (20 to 80 psi). The connector was installed 5 months before being put into service. Specimen Selection Two sections containing portions of the fracture surface were cut from the bellows for scanning electron...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0048733
EISBN: 978-1-62708-235-8
..., the maximum brine temperature was 140 °C (280 °F) and the steam pressure was 331 MPa (48 psi). About 5 months before failure, a second scaling of the brine-heater tubes occurred, and the steam pressure approached that of the steam line (517 kPa, or 75 psi). There were 44 recorded pressure surges...