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casting solidification

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Published: 01 January 2002
Fig. 32 Redesign of castings to provide progressive solidification through the use of tapered walls. (a) Elbow design. (b) Valve fitting design. Source: Ref 31 More
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Published: 30 August 2021
Fig. 12 Redesign of castings to provide progressive solidification through the use of tapered walls. (a) Elbow design. (b) Valve fitting design. Source: Ref 15 More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001199
EISBN: 978-1-62708-235-8
... to be due to preferential solidification across the casting surface, as suggested by Bosley and others. Uneven die heating will obviously contribute to such an effect but consideration of the thermal balance in the die suggests that it should not be the prime cause in most production situations. It is more...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c0089551
EISBN: 978-1-62708-218-1
... Abstract A sand-cast medium-carbon steel heavy-duty axle housing, which had been quenched and tempered to about 30 HRC, fractured after almost 5000 h of service. Investigation (0.4x magnification) revealed that the fracture had been initiated by a hot tear that formed during solidification...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001641
EISBN: 978-1-62708-235-8
...,” or more correctly, shrinkage porosity, occurs when an unsolidified portion of the casting separates from the primary liquid during solidification. The volume of liquid in the closed region is not adequate to fill the closure when the liquid to solid transformation is completed. The unfilled volume...
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
... specific to the metal group and progress from melting to solidification, casting processing, and finally how the removal of the mold material can affect performance. aluminum casting defects castings copper ductile iron failure analysis gray iron melting solidification steel Introduction...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001029
EISBN: 978-1-62708-214-3
... occur during the solidification phase of the casting process due to hindered contraction and because the hot tear fractures were present in the casting at a location where this condition was most likely to occur, a modification in the gating system was recommended to remove the hot spot. The casting...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0090974
EISBN: 978-1-62708-235-8
...-and-tempered microstructure contained solidification shrinkage, inherently poor ductility, and type II Mn-S inclusions that are known to reduce ductility. The macro and microscale fracture features confirmed that the casting was likely in low-temperature service at the time of failure. The composition...
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
... Abstract Door-closer cylinder castings manufactured of class 30 gray iron were breaking during machining. The manufacturing source reported that a random sampling of castings from this lot had hardnesses from 180 to 210 HRB. Based on the color of the components, heat treatment of these castings...
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
... edges or contours due to poor mold repair or careless application of wash coatings Defective coating (tear-dropping) or poor mold repair E 120: Serious variations from pattern shape E 121 Casting incomplete due to premature solidification Misrun E 122 Casting incomplete due...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.pulp.c0048804
EISBN: 978-1-62708-230-3
... surface were found to exhibit chevron marks typical of fatigue or raised points or tears pointing in the direction of the probable origin of failure. The characteristics of the thinwall cast iron structures like the variation in composition due to pouring from multiple ladles, variation in solidification...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.pulp.c0089567
EISBN: 978-1-62708-230-3
... that occurred during the casting operation. Fig. 3 Demarcation line at the crack, showing the differences in graphite type and distribution on either side of the crack. Etched with nital. 33x Fig. 4 Higher magnification view of Fig. 18 showing the two different solidification structures. Etched...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001284
EISBN: 978-1-62708-215-0
... Abstract Compound bow handle risers that had failed in service and during assembly along with an unassembled riser were submitted for analysis. The risers were die cast from magnesium-base alloy AM60A. Inspection of the failed risers and metallurgical investigations conducted on the stock riser...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001718
EISBN: 978-1-62708-220-4
... or inadequate head. Corrosion pitting, crevice corrosion, and solidification cracks (casting defect) also contributed to the failure. Cavitation corrosion Hydrochloric acid Pump impellers Grade 702 UNS R60702 Crevice corrosion Casting-related failures Pitting corrosion Remnants of two...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001217
EISBN: 978-1-62708-235-8
... Abstract In a housing made of cast steel GS 20MoV12 3, weighing 42 tons, precipitates were found on the austenitic grain boundaries during metallographic inspection. According to their shape and type they were recognized as carbides that precipitated during tempering. In addition, a much...
Image
Published: 01 January 2002
Fig. 62 Fracture surface of as-cast Inconel 713C tension-test section showing evidence of dendritic solidification. No fracture initiation location is evident. Tensile strength, 1048 MPa (152 ksi); yield strength, 827 MPa (120 ksi); total elongation, 6%; hardness, 36 HRC. Source: Ref 74 More
Image
Published: 15 January 2021
Fig. 62 Fracture surface of as-cast Inconel 713C tension-test section showing evidence of dendritic solidification. No fracture-initiation location is evident. Tensile strength, 1048 MPa (152 ksi); yield strength, 827 MPa (120 ksi); total elongation, 6%; hardness, 36 HRC. Source: Ref 75 More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001529
EISBN: 978-1-62708-217-4
... , and 6 ) indicates very rapid re-solidification after melting. Figure 4 shows the cladding alloy on 2024-T3, which is the nearly pure aluminum alloy 1230. The slight intrusion of the 1230 cladding alloy layer into the cast layer indicates the higher melting point of the 1230 alloy (645 to 660°C...
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
... Abstract Cluster bomb tailcone assemblies each containing two aluminum die-cast components were rejected because of the poor surface condition of the die castings. Numerous heat checks were found on the surfaces of the tailcones and radiographic inspection revealed inclusions, gas holes...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001085
EISBN: 978-1-62708-214-3
... of solidification because of hindered contraction. A hot tear frequently is open to the surface of the casting and thus exposed to the atmosphere. This may result in oxidation, decarburization or other metal-atmosphere reactions at the tear surface.” Both of these definitions apply equally well to a casting...