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Book Chapter
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0047753
EISBN: 978-1-62708-235-8
... was revealed by visual examination. Fatigue marks, emanating from multiple crack origins on the inside surface of the housing at the brazed joint were revealed by further study of the fracture. A poor metallurgical bond was confirmed by the presence of large irregular voids, flux trapped braze metal...
Abstract
A pressure probe assembly comprised of type 347 stainless steel housing, brazed with AMS 4772D filler metal to the pressure probe, failed due to detachment of a rectangular segment from the housing. The presence of a large brazing metal devoid region in the pressure probe-housing joint was revealed by visual examination. Fatigue marks, emanating from multiple crack origins on the inside surface of the housing at the brazed joint were revealed by further study of the fracture. A poor metallurgical bond was confirmed by the presence of large irregular voids, flux trapped braze metal and separation between braze and housing.
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Microstructure, linked voids, and split grain boundaries in the failed outl...
Available to PurchasePublished: 01 January 2002
Fig. 31 Microstructure, linked voids, and split grain boundaries in the failed outlet header shown in Fig. 30 . 400×
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Voids formed by methane in a carbon steel exposed to a hydrogen atmosphere ...
Available to PurchasePublished: 01 January 2002
Fig. 41 Voids formed by methane in a carbon steel exposed to a hydrogen atmosphere at high temperature. The carbides in the pearlite have been eliminated by reaction with the hydrogen. Courtesy of Dr. T.L. da Silveira, Rio de Janeiro, Brazil
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Light micrographs depicting (a) excessive and (b) low relief around voids i...
Available to PurchasePublished: 01 January 2002
Fig. 22 Light micrographs depicting (a) excessive and (b) low relief around voids in a braze between an austenitic stainless steel and Monel. The specimen was etched with glyceregia.
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(a) Cold shut voids (A, B) and flow lines (C, D) both caused by failure of ...
Available to PurchasePublished: 01 January 2002
Fig. 22 (a) Cold shut voids (A, B) and flow lines (C, D) both caused by failure of the streams of molten metal to merge, at the cast surface (E) of an alloy 384-F die casting. 0.5% hydroflouric acid. 53× (b) Gate area (A) of an alloy 413-F die casting that has a cold shut void (B) and a region
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Section through an automatic gas tungsten arc weld containing voids caused ...
Available to PurchasePublished: 01 January 2002
Fig. 20 Section through an automatic gas tungsten arc weld containing voids caused by incomplete fusion. (a) Base metal at left is Incoloy 800 nickel alloy, that at right is 2.25Cr-1.0Mo alloy steel. Filler metal was ERNiCr-3, used with cold wire feed. Macrograph. 1×. (b) Micrograph
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Overlay illustration of radiograph of weld at leak site. Four large voids e...
Available to Purchase
in Biologically Influenced Corrosion of Stainless Steel Welds by Water
> ASM Failure Analysis Case Histories: Failure Modes and Mechanisms
Published: 01 June 2019
Fig. 2 Overlay illustration of radiograph of weld at leak site. Four large voids exist in the weld itself.
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View of inside surface at weld having several large MIC voids. Weld has num...
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in Biologically Influenced Corrosion of Stainless Steel Welds by Water
> ASM Failure Analysis Case Histories: Failure Modes and Mechanisms
Published: 01 June 2019
Fig. 5 View of inside surface at weld having several large MIC voids. Weld has numerous visible flaws.
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in Biologically Influenced Corrosion of Stainless Steel Welds by Water
> ASM Failure Analysis Case Histories: Failure Modes and Mechanisms
Published: 01 June 2019
Fig. 7 View of section through the weld in Figures. 5 & 6 . Voids in the filler material are obvious. 15×.
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Microstructure, linked voids, and split grain boundaries in the failed outl...
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in Failures of Pressure Vessels and Process Piping
> Analysis and Prevention of Component and Equipment Failures
Published: 30 August 2021
Fig. 54 Microstructure, linked voids, and split grain boundaries in the failed outlet header shown in Fig. 53 . Original magnification: 400×
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Scanning electron micrograph of the crack surface showing creep voids. Orig...
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in Failure of Boilers and Related Equipment
> Analysis and Prevention of Component and Equipment Failures
Published: 30 August 2021
Fig. 19 Scanning electron micrograph of the crack surface showing creep voids. Original magnification: 250×
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in Failure Analysis of Railroad Components
> Analysis and Prevention of Component and Equipment Failures
Published: 30 August 2021
Fig. 98 Head of rail. Arrows indicate the voids present
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Internal surface of a sample at the 12:00 position. Voids from hydrogen dam...
Available to PurchasePublished: 01 December 1993
Fig. 2 Internal surface of a sample at the 12:00 position. Voids from hydrogen damage are evident beneath the internal corrosion (black arrows). Nital etch. (a) Copper deposits are visible on the internal surface (white arrows). (b) Microfissures near the internal gouging. 800×.
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Microstructure in Tube 3 at the rupture. The creep voids have linked up to ...
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in Creep Failure of a Superheater Tube Promoted by Graphitization
> Handbook of Case Histories in Failure Analysis
Published: 01 December 1993
Fig. 3 Microstructure in Tube 3 at the rupture. The creep voids have linked up to form a crack. Nital etchant. (a) 177×. (b) 308×.
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Intergranular corrosion at the external surface of the flange. The voids ar...
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in Intergranular Corrosion/Cracking of a Stainless Steel Pipe Reducer Section in Bleached Pulp Stock Service
> Handbook of Case Histories in Failure Analysis
Published: 01 December 1992
Fig. 8 Intergranular corrosion at the external surface of the flange. The voids are the locations of the spalled grains. 50×.
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SEM micrographs of typical shrinkage voids. EDS spectra of the four numbere...
Available to PurchasePublished: 01 December 1992
Fig. 5 SEM micrographs of typical shrinkage voids. EDS spectra of the four numbered locations in (b) are shown in Fig. 6 and 7 . (a)46.5×. (b)124×.
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Photomicrograph showing crack at toe of weld. Note voids along fusion zone ...
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in Cracking of Inconel 800H in a Steam Methane Reformer Furnace
> Handbook of Case Histories in Failure Analysis
Published: 01 December 1993
Fig. 5 Photomicrograph showing crack at toe of weld. Note voids along fusion zone and intergranular corrosion within base metal and weld metal. 15.75×
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Photomicrograph of the b failure lip in tube 1. Note the creep voids along ...
Available to PurchasePublished: 01 December 1993
Fig. 5 Photomicrograph of the b failure lip in tube 1. Note the creep voids along the fracture surface. Nital etch, 38×
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Typical results of in situ EDS analyses at the base of shrinkage voids in t...
Available to PurchasePublished: 01 December 1993
Fig. 10 Typical results of in situ EDS analyses at the base of shrinkage voids in the impeller
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Image
(a) Cold shut voids (A, B) and flow lines (C, D), both caused by failure of...
Available to PurchasePublished: 30 August 2021
Fig. 36 (a) Cold shut voids (A, B) and flow lines (C, D), both caused by failure of the streams of molten metal to merge, at the cast surface (E) of an alloy 384-F die casting. 0.5% hydrofluoric acid. Original magnification: 53×. (b) Gate area (A) of an alloy 413-F die casting that has a cold
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