1-20 of 142 Search Results for

casting voids

Sort by
Image
Published: 01 December 1993
Fig. 9 Closeup views of a repair weld covering a casting void or shrinkage cavity. Etched in Vilella's reagent. (a) ∼1.09×. (b)∼6.2× More
Image
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
Image
Published: 01 December 2019
Fig. 12 (a) Optical micrographs of the exemplar club microstructure with casting voids. One large void of 500 μm in diameter is shown in the image. Fewer voids were noticed across the examined surface. The void is highlighted by the red box and is shown at a (b) higher magnification More
Image
Published: 01 December 2019
Fig. 8 (a) Optical micrographs of the subject club microstructure with casting voids. Multiple voids up to 200 μm in diameter are shown in the image. The 200-μm-diameter voids were a consistent occurrence across the examined surface. One of the voids is highlighted by the red box More
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
... examined using a scanning electron microscope (SEM) and photographically documented ( Fig. 5 ). The surfaces exhibited a dendritic structure, which indicated that the defects were formed during the original impeller casting process. Fig. 5 shows a low-magnification view of the shrinkage void surface...
Image
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
Image
Published: 01 December 1993
Fig. 8 Photomicrograph showing a typical example of some of the larger shrinkage cavities/casting voids observed in the damaged impeller. Etched in Vilella's reagent. 31× More
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001781
EISBN: 978-1-62708-241-9
... moments generated during the downswing aggravated by manufacturing defects and stress concentration combined to create an overload condition. golf club fracture stress concentration aluminum alloy casting voids mechanical testing bending moment A360 (3xx.x series, cast aluminum-silicon alloy...
Image
Published: 01 June 2019
Fig. 3 Section of attacked cast steel flange showing voids surrounded by ferrite. 500× More
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001758
EISBN: 978-1-62708-241-9
.... Similar yielding and voiding was observed on additional airfoils from this rotor set with the root cause of stress rupture attributed to insufficient cooling margin. Fig. 8 Stress-rupture initiated fracture on trailing edge of internally cooled SX turbine blade casting adjacent to the platform...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0046233
EISBN: 978-1-62708-235-8
... fractograph at 20,000x revealed fatigue striations and corrosion products on the fracture surface, indicating that this area was probably the site of fracture origin and that it had cracked before the accident happened. The casting on the right side of the drawbar contained large voids and a significant...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001683
EISBN: 978-1-62708-234-1
... that voids generally grew in the wrought material by uniform general corrosion. Tunneling or worm-holing was also observed, whereby void extension occurred by initiating daughter voids probably at flaws or other inhomogeneities. Selective attack occurred within the fusion zone, i.e., within the cast two...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001083
EISBN: 978-1-62708-214-3
... Abstract Copper alloy (C83600) impellers from two different feed pumps that supplied water to a 2-year-old boiler failed repeatedly. Examination by various methods indicated that the failures were caused by sulfide attack that concentrated in shrinkage voids in the castings. Two alternatives...
Image
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
Image
Published: 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 More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0089651
EISBN: 978-1-62708-235-8
..., adjacent to the radius on the underside of the adjusting screw arm, near the casting parting line. The black appearance was a result of heavy oxidation along interdendritic voids connected to the surface by dendrite ribs. A cross section through a similar defect in another rocker lever revealed...
Image
Published: 01 June 2019
Fig. 8 Photomicrograph of section of void on left in Figure 6 . Note that the void wall is rough as a result of corrosion following grain boundaries in the cast structure of the weld. 64×. More
Image
Published: 01 December 1993
Fig. 5 SEM micrographs showing the appearance of the cross section of a shrinkage void that was fractured open in the laboratory. The void surface has a dendritic structure, which indicates that it was formed during the original impeller casting process. (a)∼18.6×. (b)∼310× More
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001375
EISBN: 978-1-62708-215-0
... no identifiable fracture origin. No voids from shrinkage or misruns were observed. Fig. 4 View of fractured surface. Arrows indicate area of reduced wall thickness. The same internal wall area was removed from the other two castings. The minimum thickness was 16 mm ( 5 8 in.) in casting 2...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001753
EISBN: 978-1-62708-241-9
... microstructure of transverse section of right-side fork leg Figure 8 demonstrates the microstructure of the casting at a lower magnification and further illustrates the proliferation of voids within the casting. These defects represent pre-existing surfaces or cracks within the component, where...