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Published: 01 January 2002
Fig. 44 Failure prevention effort prioritization More
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Published: 15 January 2021
Fig. 42 Failure-prevention effort prioritization More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001647
EISBN: 978-1-62708-235-8
... Abstract An unacceptable degree of porosity was identified in several closure welds on stainless steel containers for plutonium-bearing materials. The pores developed in the weld tie-in region due to gas trapped by the weld pool during the closure process. This paper describes the efforts...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001611
EISBN: 978-1-62708-219-8
... Abstract Cold cracking of structural steel weldments is a well-documented failure mechanism, and extensive work has been done to recognize welding and materials selection parameters associated with it. These efforts, however, have not fully eliminated the occurrence of such failures...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c0065825
EISBN: 978-1-62708-228-0
... Abstract A case of continual product refinement stimulated by product failures was described. Brittle fracture of gas transmission line pipe steels occurred demonstrating a poor combination of materials, environment, manufacturing and installation problems, and loads. Initial efforts were...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0090881
EISBN: 978-1-62708-229-7
... measuring 19 mm OD, nominal wall thickness of 1.0 mm (0.042 in.), and average length of 18 m (57.75 ft). The original operating temperature of the reactor coolant was 328 deg C (621 deg F). A tube removal effort was conducted following the tube rupture event. Investigation (visual inspection, SEM...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001661
EISBN: 978-1-62708-229-7
... Abstract An evaluation of indications in the main turbine building column horizontal plate welds was conducted by the joint efforts of field metallography and nondestructive examinations. The turbine building main column horizontal plate welds were selected at random and were inspected to find...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001717
EISBN: 978-1-62708-217-4
... an alternative material with a lower notch sensitivity. In addition, the temperature at which this alloy is treated must be monitored to prevent coarse grain growth. As a result of this investigation and in an effort to eliminate future failures, ARL assisted in developing a cadmium brush plating procedure...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001583
EISBN: 978-1-62708-217-4
... verification, accessed overall workmanship, and measured the respective surface roughness of the rods in an effort to identify any discrepancies. Next, mechanical testing was performed, followed by optical and electron microscopy, and chemical analysis. Finally, ARL performed laboratory heat treatments...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c0047846
EISBN: 978-1-62708-218-1
... was removed in an effort to reduce cost and hence the shaft was subjected to increased vibration and shock loading. Insufficient fatigue limit of the shaft was revealed by fatigue testing of the shafts taken from stock in a rotating-beam machine. As a corrective measure, the fatigue limit of shafts...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001024
EISBN: 978-1-62708-214-3
... Abstract A Marine Corps helicopter crash was investigated. Efforts were directed to the failure of one of the main rotor blades that had apparently separated in the air. The apparent failure of a blade integrity monitor (BIM) system was also considered. The rotor blade comprised a long, hollow...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0089651
EISBN: 978-1-62708-235-8
... at and near the spiking defect shown in Fig. 46. (a) Heavy oxidation within an interdendritic void. As-polished. (b) Partial decarburization of the tempered martensitic matrix adjacent to a spiking defect. Etched with nital. Both 300x Efforts to sort defective rocker levers by means of magnetic...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001522
EISBN: 978-1-62708-235-8
... process. Foundry practice Gating and risering Housings Permanent mold castings Porosity A357 UNS A13570 Casting-related failures A concerted research effort undertaken to improve the strength properties of cast aluminum forward housing assemblies for guided munitions may improve...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001294
EISBN: 978-1-62708-215-0
... then necessary to isolate the possible corrosive solution(s) so that the appropriate corrective actions could be identified. Efforts were pursued to determine whether poppet valve assemblies should be considered acceptable for flight if they pass helium pressure tests. Specimens were submerged in hydrazine...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.homegoods.c0091857
EISBN: 978-1-62708-222-8
... The authors gratefully acknowledge the efforts of Dr. Fahmida Hossain, Veda-Anne Ulcickas, Leonard Norman, and Thomas Painter of Massachusetts Materials Research, Inc. for their enlightening analyses and contributions to the case histories presented in the source article. Selected Reference Selected...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001842
EISBN: 978-1-62708-241-9
... screw head. The shallow holes were backfilled with weld metal and ground smooth. There was no effort taken to stress relieve the weld location. Fig. 6 Sketch showing manner by which balance weight attached to roll wall The characteristic features of the fracture surface ( Fig. 4 ) were...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c0089766
EISBN: 978-1-62708-224-2
... radius, but this region was highly stressed, and fatigue accounted for the numerous failures of posts. In an effort to improve the strength of the joint, an improved design was adopted. The improvement was associated with the flange, which was machined from a 100 mm (4 in.) thick plate of normalized...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001906
EISBN: 978-1-62708-217-4
... inspection (a central conductor shot and a head-shot) to assure that any laps or seams were detected. The handling of the lugs subsequent to inspection was also improved in an effort to reduce the masking of defective parts. Thousands of lugs were scrapped as a result of this re-inspection, and the contracts...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0089256
EISBN: 978-1-62708-235-8
... indications. Fig. 6 Application-life diagram showing effects of different sized material discontinuities on service life Acknowledgments The authors gratefully acknowledge the efforts of Dr. Fahmida Hossain, Veda-Anne Ulcickas, Leonard Norman, and Thomas Painter of Massachusetts Materials...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001402
EISBN: 978-1-62708-220-4
... may therefore have corresponded to the toe of the original fillet weld. It will also be noted that weld-metal had been applied externally, presumably in an effort to rectify leakage at some time or another, and that weld-metal was also present internally up to a distance of 3 4 in. from...