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Adapters
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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.homegoods.c0090971
EISBN: 978-1-62708-222-8
... Abstract A die-cast zinc adapter used in a snowthrower failed catastrophically in a brittle overload manner. The component had a chemical composition similar to standard zinc alloy ZA-27 (UNS Z35840), although the iron content was much higher and the copper slightly lower. The mechanical...
Abstract
A die-cast zinc adapter used in a snowthrower failed catastrophically in a brittle overload manner. The component had a chemical composition similar to standard zinc alloy ZA-27 (UNS Z35840), although the iron content was much higher and the copper slightly lower. The mechanical properties and alloy designation were not specified. Investigation (visual inspection, 187x SEM images, unetched 30x images, hardness testing, and chemical analysis) of both the failed adapter and an exemplar casting from known-good lot supported the conclusion that the casting failed as a result of brittle overload fracture due to excessive iron-zinc phase and gross porosity. These conditions acted synergistically to reduce the strength of the material. The composition was nonstandard, and the inherent brittleness suggested that it was unlikely that this material was an intentional proprietary alloy. No recommendations were made.
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 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 exercise...
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 exercise. Determination of the cause of the explosion was the primary objective of the examination. Metallographic studies included the examination of BFAs fabricated from two different types of alloys that were tested for shock reaction. Optical microscopy supported by electron microscopy and analytical methods were used. Our investigation supports the supposition that a live round of ammunition was inadvertently fired.
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in Brittle Overload Failure of Die- Cast Zinc Snowthrower Adapters
> ASM Failure Analysis Case Histories: Household Products and Consumer Goods
Published: 01 June 2019
Fig. 1 Brittle overload of a die-cast zinc snowthrower adapter. (a) Fracture surface of failed zinc casting contained many large brittle constituents. Energy-dispersive spectroscopy analysis revealed these were high-iron content inclusions. Scanning electron micrograph. 178×. (b
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in Analysis of Failed Nuclear Plant Components[1]
> ASM Failure Analysis Case Histories: Power Generating Equipment
Published: 01 June 2019
Fig. 1 Schematic of portion of control rod drive head adapter tube assembly, showing enlarged view of canopy seal weld region.
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in Metallurgical Examinations of a Fragmented Blank Firing Adapter and Associated Components from an M-16 Rifle
> ASM Failure Analysis Case Histories: Improper Maintenance, Repair, and Operating Conditions
Published: 01 June 2019
Fig. 1 M-16 rifle with blank firing adapter (BFA) in position. Close-up of BFA is shown in inset photograph. The rifle is shown with the magazine removed.
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in Metallurgical Examinations of a Fragmented Blank Firing Adapter and Associated Components from an M-16 Rifle
> ASM Failure Analysis Case Histories: Improper Maintenance, Repair, and Operating Conditions
Published: 01 June 2019
Fig. 2 Press announcement of the explosion of a blank firing adapter and subsequent injury to a member of the security personnel (Knoxville, TN. News-Sentinel, August 19, 1983).
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in Metallurgical Examinations of a Fragmented Blank Firing Adapter and Associated Components from an M-16 Rifle
> ASM Failure Analysis Case Histories: Improper Maintenance, Repair, and Operating Conditions
Published: 01 June 2019
Fig. 3 A normal blank firing adapter (BFA). The component identified as the nut is screwed on to the barrel of the rifle.
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in Metallurgical Examinations of a Fragmented Blank Firing Adapter and Associated Components from an M-16 Rifle
> ASM Failure Analysis Case Histories: Improper Maintenance, Repair, and Operating Conditions
Published: 01 June 2019
Fig. 6 Microstructure of blank firing adapter (ORNL-1), fragment S, Figure 4 . Note many of the carbides exhibit cracks which could have resulted from an impact.
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Published: 01 January 2002
Fig. 19 Brittle overload of a die-cast zinc snowthrower adapter ( example 8 ). (a) Fracture surface of failed zinc casting contained many large brittle constituents. Energy-dispersive spectroscopy analysis revealed these were high-iron content inclusions. Scanning electron micrograph. 178×. (b
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in Failure of a 20 Ton Polar Crane Motor by Bolt Fatigue
> Handbook of Case Histories in Failure Analysis
Published: 01 December 1992
Fig. 2 Motor adapter plate installed on the crane. The area encompassed by the triangle illustrates the 1 4 -20 screw extending from the motor adapter plate.
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in Failure of a 20 Ton Polar Crane Motor by Bolt Fatigue
> Handbook of Case Histories in Failure Analysis
Published: 01 December 1992
Fig. 3 Motor adapter plate and the location of the top of the plate during installation. The elliptical shape of the holddown screws is evident.
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in Failure of a 20 Ton Polar Crane Motor by Bolt Fatigue
> Handbook of Case Histories in Failure Analysis
Published: 01 December 1992
Fig. 4 Closeup view of distended 6.4 mm ( 1 4 in.) hole in the adapter plate.
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in Failures Related to Metal Additive Manufacturing
> Analysis and Prevention of Component and Equipment Failures
Published: 30 August 2021
Fig. 15 Time-temperature-transformation diagram for Inconel 718. Adapted from Ref 37 . Copyright 1991 by The Minerals, Metals & Materials Society. Used with permission
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in Failures of Rolling-Element Bearings and Their Prevention
> Analysis and Prevention of Component and Equipment Failures
Published: 30 August 2021
Fig. 2 Main loading directions of rolling-element bearing structures. Adapted from Ref 3
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Published: 30 August 2021
Fig. 9 Example of (a) proportional versus (b) nonproportional loading. Adapted from Ref 16
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Published: 30 August 2021
Fig. 15 Failed compressor shaft cross section showing beach marks. Adapted from Ref 56
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Published: 30 August 2021
Fig. 16 Fatigue fracture surface of a pipe-to-elbow weld showing beach marks. Adapted from Ref 56
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Published: 30 August 2021
Fig. 19 API 579 creep fatigue damage acceptance criterion. Adapted from Ref 16 Material parameters to define the acceptable creep fatigue envelope Material D fm D cm Carbon steels 0.15 0.15 Low-alloy steels 0.15 0.15 9Cr-1Mo-V 0.10 0.02 Type
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