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casting voids

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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
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001758
EISBN: 978-1-62708-241-9
... via engine-induced tensile overload Fig. 9 Initial region of rougher, interdendritic stress-rupture fracture at the trailing edge SX turbine blade casting. Creep voids can be observed on the fracture surface in this case Fig. 10 SEM backscatter electron (BEI) image documenting...
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
... the cast two-phase structure of the weld filler itself. The result was a void wall which consisted of a rough and porous ferritic material, a consequence of preferential attack of the austenitic phase and slightly lower rate of corrosive attack of the ferrite phase. The three-dimensional spongy surface...
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...
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 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...
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
... Representative 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...
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
... 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 interdendritic-appearing voids surrounded by heavy...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006775
EISBN: 978-1-62708-295-2
... nucleation and propagation. In cast alloys, the presence of both microscale interdendritic porosity and macroscale shrinkage cavities provide “holes” for crack nucleation. There is little difference in void growth from shrinkage porosity and a hole containing an unbonded inclusion. The incipient crack...
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
.... Metallographic analysis also revealed no evidence of metallurgical defects, such as cold shuts, voids, or slags, in the body of the casting or at the fracture surfaces. Most Probable Cause Remedial Action Visual Macrofractography Two sections were removed from casting 1 for metallographic...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003538
EISBN: 978-1-62708-180-1
... geometry stress raisers stress-strain behavior twinning unnotched specimen void growth ALTHOUGH FRACTURE can be apparently brittle at the macroscale (without visible distortion), the fracture process at the microscale can be brittle, ductile, alternating, or mixed, as discussed in the preceding...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001003
EISBN: 978-1-62708-227-3
... to the extensive internal “notching” provided by the crack-like voids, which may be considered similar in their effect on ductility to the graphite flakes in gray cast iron. The cause of the embrittlement, then, is not so much the absorption of hydrogen as the formation of the crack-like voids. Evidence...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0047297
EISBN: 978-1-62708-235-8
... that was cracked on another casting. 1.5x The second casting (identified as cracked) was cracked along the parting line and through a region exhibiting the presence of a void. Further examination revealed that the bore was not centered, indicating a core-shift condition during casting. The void had...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006760
EISBN: 978-1-62708-295-2
...-bearing capability may be reduced ( Fig. 28 ). Fig. 28 8650 alloy steel with ferrite only on surface, gradually changing to martensite. Nital etch Gas porosity is indicated by rounded voids caused by precipitation of gas bubbles in molten material during casting ( Fig. 30 ). Fig. 30...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001687
EISBN: 978-1-62708-220-4
... boundaries properties. Grain boundary sliding and dislocation motion were enhanced, causing a local increase in the steady state strain rate and the premature failure of the tube. Grain boundary sliding Plastic deformation Spalling Voids HK UNS J94224 Creep fracture/stress rupture...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001712
EISBN: 978-1-62708-234-1
... to account for the dimensional change observed in the failed rolls. This paper details the failure analysis and resulting research it inspired. It also provides recommendations for cast material choice in highly nitriding atmospheres. Metal powders Nitrogen absorption Reduction furnaces Rolls...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006824
EISBN: 978-1-62708-329-4
... Deformation mechanism map for the cast nickel-base superalloy MAR-M200 with a grain size of 100 μm. Source: Ref 3 The formation of cavities (voids) on the grain boundaries during creep is brought about by migration of crystal lattice defects and/or the grain-boundary sliding process ( Ref 4...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006780
EISBN: 978-1-62708-295-2
... of interdendritic stress-rupture fracture at the trailing edge (TE) of single-crystal turbine blade casting showing creep voids on the fracture surface. (b) Scanning electron microscopy backscatter electron image of stress-rupture cracks and wrinkled aluminide coating on concave trailing-edge side of single-crystal...
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
.... Table 1 presents some of the common defects in each category. In general, defects that can serve as stress raisers or crack promoters are the most serious. These include preexisting cracks, internal voids, and nonmetallic inclusions. Imperfections That Can Occur in Iron and Steel Castings...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0089563
EISBN: 978-1-62708-217-4
...Abstract Abstract A lever (machined from a casting made of AISI type 410 stainless steel, then surface hardened by nitriding) that was a component of the main fuel-control linkage of an aircraft engine fractured in flight after a service life of less than 50 h. Investigation (radiographic...