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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...
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Published: 01 June 2019
Fig. 9 Small creep voids identified at the extreme tip of the crack More
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Published: 01 June 2019
Fig. 2 Microstructure, linked voids, and split grain boundaries in the failed outlet header shown in Fig. 1 . 400x More
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Published: 01 June 2019
Fig. 3 Section of attacked cast steel flange showing voids surrounded by ferrite. 500× More
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Published: 01 June 2019
Fig. 3 Views of the scaled heating element. Fractures with internal voids. 1× More
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Published: 01 June 2019
Fig. 7 Voids on the austenite grain boundaries below the scaled region, cross-section, etched in V2A pickling solution. 100× More
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Published: 01 June 2019
Fig. 8 SEM photographs of the exterior of the CIM drain tube. (a) Voids visible on the grain boundary near the holes and widening of the grain boundaries characteristic of incipient melting (see arrows). (b) Area appearing to have melted More
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Published: 01 June 2019
Fig. 7 Optical micrographs of the failed pin showing the initiation of voids (a) which grow into cracks (b) in the shear bands. Note the voids are round (a). More
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Published: 01 June 2019
Fig. 2 Overlay illustration of radiograph of weld at leak site. Four large voids exist in the weld itself. More
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Published: 01 June 2019
Fig. 5 View of inside surface at weld having several large MIC voids. Weld has numerous visible flaws. More
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Published: 01 June 2019
Fig. 7 View of section through the weld in Figures. 5 & 6 . Voids in the filler material are obvious. 15×. More
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Published: 01 December 2019
Fig. 13 Typical creep voids forming on transverse grain boundaries from solid, equiaxed turbine blade casting. Void coalescence will eventually lead to a stress-rupture crack More
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Published: 01 December 2019
Fig. 14 Creep voids forming near the trailing edge of SX turbine blade casting at ∼ 5% airfoil span. Casting contains no grain boundaries. Etchant: 33% glycerol, 33% nitric acid, 33% acetic acid, and 1–3% hydrofluoric acid More
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Published: 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 More
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Published: 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. More
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Published: 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 More
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Published: 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 More
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Published: 30 August 2021
Fig. 98 Head of rail. Arrows indicate the voids present More
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Published: 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×. More
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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×. More