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shrinkage cavities

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Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001074
EISBN: 978-1-62708-214-3
... by the presence of shrinkage cavities, which lowered the load-bearing capability. The failure occurred at the location where there was an abrupt change in the section thickness. A redesign to provide a smooth contour at the section junction was recommended along with optimization of casting parameters to avoid...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001201
EISBN: 978-1-62708-232-7
... at the stained spot. This led to the conclusion that a shrinkage cavity was present. Metallographic examination confirmed that the fracture of the swivel head was caused or favored by a cavity. Castings Shrinkage Spindles Steel casting Casting-related failures The swivel head of a driving spindle...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001365
EISBN: 978-1-62708-215-0
... voids from the original casting process. Surface repair welds had been used to fill in or cover over larger shrinkage cavities. It was recommended that more stringent visual and nondestructive examination criteria be established for the castings. A743 Electric power generation Repair welds...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001255
EISBN: 978-1-62708-232-7
... by precipitates which make possible the precipitation of hydrogen and facilitate separation. In the core of the roll the fracture microstructure was dendritic ( Fig. 4 ); a shrinkage cavity must therefore be present. Fig. 3 Fracture surface on outer edge of roll. 1 × Fig. 4 Fracture surface...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001302
EISBN: 978-1-62708-215-0
... in the region which undergoes the most deformation during forging. Moreover, the cracks exhibited rounded large intergranular facets associated with localized melting at the grain boundaries. Throughout the shoulder regions there were solidification shrinkage cavities and MnS inclusions. The latter showed...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001908
EISBN: 978-1-62708-235-8
... holes, and shrinkage defects in the castings. Most of the components failed to meet required mechanical properties because of these casting defects. Bombs (weapons) Tailcones Die castings Heat checking Inclusions Shrinkage Porosity A356 UNS A13560 Casting related failures Introduction...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c0089696
EISBN: 978-1-62708-220-4
... the beach marks. The crack front apparently traveled rapidly in discrete steps. Figure 7 shows an area in the fracture where primary shrinkage porosity was present. Note the dendritic structure. Fig. 7 Dendritic structure in a primary shrinkage cavity. 16×. Figure 8 is a spectrum...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001089
EISBN: 978-1-62708-214-3
... occurred by fatigue primarily from the beach marks. The crack front apparently traveled rapidly in discrete steps. Figure 7 shows an area in the fracture where primary shrinkage porosity was present. Note the dendritic structure. Fig. 7 Dendritic structure in a primary shrinkage cavity. 16...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001205
EISBN: 978-1-62708-219-8
... longitudinal sections were made through the planes designated as 6, 7, 8 and 9 in Fig. 4 . They confirmed that welding caused complete melting of certain spots of the shaft tubing causing blistered or shrinkage cavities in the solidified area ( Fig. 5 ). The blue spot in the fracture may possibly be due...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001803
EISBN: 978-1-62708-241-9
...-14Ni 7 Inclusions, shrinkage cavities, segregations Intramedullar nails 15Cr-10Ni-15Nb 1.5 Wear, fatigue Spinal rods 17Cr-15Ni-3Mn 3 Corrosive attack, pitting, wear Compression plates Ti-6Al-4V 1 Inclusions, multiorigined ductile fracture Vertebral implant 316L 2 Erosion...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001364
EISBN: 978-1-62708-215-0
... on a metallurgical microscope for evaluation of microstructure. Figure 4 shows the typical microstructure observed in the aluminum pieces. The structure consists of dendrites of primary aluminum with inter-dendritic silicon particles and porosity. The porosity (shrinkage cavities) is most likely caused...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001445
EISBN: 978-1-62708-227-3
.... In the majority of ingots, the shrinkage cavity or pipe is normally axial and, during the piercing operation, the lower end of it is displaced to the top of the ingot, to be removed when the ingot is cropped. However, if the ingot should be laid on its side or be knocked over before solidification is complete...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003532
EISBN: 978-1-62708-180-1
... (a) Macrograph of fracture, (b) SEM fractograph, and (c) light micrograph showing shrinkage cavities in an unusual tensile fracture from a carbon steel casting. The microstructure was revealed using nital. Fig. 25 Light micrographs of two cross-sectional views of a seam found on a closed-die forged...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006765
EISBN: 978-1-62708-295-2
... of thermosetting materials may be ejected from the mold at the maximum molding temperature. However, cooling thermosetting resins under pressure to near-ambient temperature before ejection significantly reduces shrinkage gap formation. Never rapidly cool a thermosetting resin mount with water after hot ejection...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006835
EISBN: 978-1-62708-329-4
... whether the revealed segregation is metallic or a concentration of nonmetallic impurities. A common imperfection in ingots is pipe, which is an internal shrinkage cavity formed during solidification of ingots. It occurs in the upper central portion of the ingot ( Fig. 1 ) during solidification...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001301
EISBN: 978-1-62708-215-0
...: MLR-28, which had an apparent fracture origin at the root; MRR-4, F-8, and F-9, which had NDT indications in the root; F-5, with visual pitch line damage; and F-18 and F-23, which had fracture origins at shrinkage cavities. Cross sections were prepared in accordance with standard metallographic...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001657
EISBN: 978-1-62708-227-3
... , and some of these pores could well be classified as subsurface shrinkage cavities, Figure 17 . Along the concave surface, the corrosion product penetration had extended in places right into these subsurface cavities, Figure 17 , thus rendering them potentially hazardous critical crack nucleation sites...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006831
EISBN: 978-1-62708-329-4
... more or less extended areas Surface pinholes B 124 (a) Small, narrow cavities in the form of cracks, appearing on the faces or along edges, generally only after machining Dispersed shrinkage B 200 Cavities with generally rough walls, shrinkage B 210 Open cavity of Class B...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003508
EISBN: 978-1-62708-180-1
... in the form of cracks, appearing on the faces or along edges, generally only after machining Dispersed shrinkage B 200: Cavities with generally rough walls, shrinkage B 210: Open cavity of Class B 200, sometimes penetrating deeply into the casting B 211 (a) Open, funnel-shaped cavity...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003507
EISBN: 978-1-62708-180-1
... with respect to the ring) of the connecting end in the transition area Ingot Pipe, Porosity, and Centerline Shrinkage A common imperfection in ingots is pipe, which is an internal shrinkage cavity formed during solidification of ingots. It occurs in the upper central portion of the ingot ( Fig. 1...