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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0047677
EISBN: 978-1-62708-217-4
... Abstract Resistance spot welds joining aluminum alloy 2024-T8511 stiffeners to the aluminum alloy 6061-T62 skin of an aircraft drop tank failed during slosh and vibration testing. Visual examination of the fracture surfaces showed that the failure was by tensile or bending overload...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0047566
EISBN: 978-1-62708-235-8
... equipment Filler metal Welding parameters 502 UNS S50200 Joining-related failures Handles welded to the top cover plate of a chemical-plant downcomer broke at the welds when the handles were used to lift the cover. The handles were fabricated of 19-mm ( 3 4 -in.) diam low-carbon steel rod...
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Published: 01 June 2019
Fig. 2 Upper part of the tee joining the collector to the riser showing the repair weld on the thermal fatigue cracks. More
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Published: 01 June 2019
Fig. 8 Crack joining inclusions More
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Published: 01 June 2019
Fig. 1 Cracks that occurred at the margin of a weld joining a fairing to a support arm of a type 321 stainless steel fuel-nozzle-support assembly. (a) Photograph of the weld showing fatigue cracks along both edges. The support arm, welded to the fairing at a T-shape joint, is directly beneath More
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Published: 01 June 2019
Fig. 1 Sections through a fractured laser beam weld joining a Hastelloy X cooling tube to a base plug of the same material. The weld fractured by stress rupture from tensile overload, which resulted from stress concentrations at a notch left by inadequate joint penetration. (a) Unfailed More
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Published: 01 June 2019
Fig. 14 Vertical shear step joining two terraces. More
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Published: 30 August 2021
Fig. 2 Welding and joining processes. Adapted from Ref 3 More
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Published: 01 December 1993
Fig. 5 Optical micrographs of a sectioned poppet valve assembly before joining of the bellows showing a uniform appearance and martensitic structure. (a) 5.6× (b) 21× More
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Published: 01 December 1993
Fig. 6 SEM micrographs of a sectioned poppet valve assembly before joining of the bellows showing the martensitic structure. (a) 285 ×. (b) 1710× More
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Published: 01 December 1993
Fig. 8 Methods of tube joining. (a) Fishmouthing. (b) Reduction of stress concentration using fillets More
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Published: 01 December 1992
Fig. 3 Fracture origin at weld joining cross frame to flange. More
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Published: 01 December 2019
Fig. 2 Neighbor-joining tree based on 16S rRNAgene sequences, showing the phylogenetic position of calcium precipitating bacteria Enterococcus sp., Enterobacter sp. and Serratia sp. strains. Bootstrap values are given at the nods More
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Published: 01 January 2002
Fig. 30 Lamellar tear beneath a T-joint weld that joined two low-carbon steel plates. (a) Fractograph of lamellar tear showing separation that has followed flattened inclusions. Approximately 0.3×. (b) Section through fracture (top), which occurred in the coarse-grain reaustenitized region More
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Published: 01 January 2002
Fig. 56 Schematic of the failure of spot welds to join a bracket to a baseplate assembly. The failure was caused by inadequate welding current density resulting from extension of the electrode beyond the edge of the bracket flange. More
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Published: 01 June 2019
Fig. 2 Structure in center of fracture contains grains joined by tendrils. Magnification 840 times. More
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Published: 30 August 2021
Fig. 5 The same lug is joined by an identical weld to the same beam, yet the stresses in the weld are (a) uniform and (b) very nonuniform. More
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Published: 01 December 1993
Fig. 2 Construction of the cross-tee, showing the 2-in. Schedule 80 pipe (A), joined to the 3-in. Schedule 80 pipe (C-D) by a reduction socket (E). The remaining arm of the cross (B) was a flanged nipple welded to the 3-in. pipe. The rupture is at the toe of the weld between the 3-in. pipe More
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Published: 15 May 2022
Fig. 21 Structure of a phenol formaldehyde. (a) Two phenol rings join with a formaldehyde molecule to form a linear chain polymer and molecular by-product. (b) Excess formaldehyde results in the formation of a network thermosetting polymer due to cross linking. Source: Ref 4 More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c0048808
EISBN: 978-1-62708-228-0
... Abstract The welds joining the liner and shell of a fluid catalytic cracking unit failed. The shell was made of ASTM A515 carbon steel welded with E7018 filler metal. The liner was made of type 405 stainless steel and was plug welded to the shell using ER309 and ER310 stainless steel filler...