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casting defects

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c0089543
EISBN: 978-1-62708-226-6
.... Bone screws Casting defects Screws Surgical implants ASTM F75 Casting-related failures Portions of the threads of the screw shown in Fig. 1(a) had broken off, and other threads had cracked. The screw was made from a cast Co-Cr-Mo alloy. A longitudinal section through the screw revealed gas...
Image
Published: 01 January 2002
Fig. 16 Close-up views of surface casting defects on a paper-drier head. (a) At the 12 o'clock position. (b) At the 9 o'clock position, with arrow indicating a surface defect. (c) At the 6 o'clock position. All approximately 0.2× More
Image
Published: 30 August 2021
Fig. 4 Close-up views of surface casting defects on a paper-drier head. (a) At the 12 o’clock position. (b) At the 9 o’clock position, with arrow indicating a surface defect. (c) At the 6 o’clock position. Original magnification of all: 0.2× More
Image
Published: 01 June 2019
Fig. 1 Close-up views of surface casting defects on a paper-drier head. (a) At the 12 o'clock position. (b) At the 9 o'clock position, with arrow indicating a surface defect. (c) At the 6 o'clock position. All approximately 0.2x More
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
... for sequential polishing and metallographic observations to determine the size of the cavities. Four randomly selected numbers of unmachined castings obtained from the same supplier were used for radiography to assess the location of shrinkage cavities. Cut portions containing the defect locations from...
Image
Published: 01 June 2019
Fig. 1 There is a major casting defect in this fracture surface. But evidence indicated that the part failed because improper procedures were used in shipping. More
Image
Published: 01 December 1992
Fig. 4 SEM micrographs of area A in Fig. 3(a) , showing hot tear casting defect. (a) 41×. (b)126×. More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c0047263
EISBN: 978-1-62708-218-1
... Abstract An engine cylinder head failed after operating just 3.2 km (2 mi) because of coolant leakage through the exhaust port. Visual examination of the exhaust ports revealed a casting defect on the No. 7 exhaust-port wall. A 0.9x examination of an unpolished, unetched longitudinal section...
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
... castings with 0.8 to 1.0% C, 1% Mn, 1% Cr, 0.5% Mo and 0.4% Ni and were heat treated to a tensile strength of 950 N/sq mm. Because the bending stress on mounting was only 42 N/sq mm in the fracture cross section, it was evident at the outset that material defects had promoted the fracture. In the case...
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
..., 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 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
... etched 300x magnification) supported the conclusion that the rocker levers failed in fatigue, with casting defects, or spiking, acting as stress raisers to initiate failures in highly loaded engine tests. Recommendations included shot peening of the levers as an interim measure to reduce the possibility...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0089663
EISBN: 978-1-62708-229-7
... defect was observed adjoining a tapped hole. A second, much larger cavity was also detected. Investigation (visual inspection and 7500x SEM fractographs) supported the conclusions that failure occurred through a zone of structural weakness that was caused by internal casting defects and a tapped hole...
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
... source of crack initiation. The combination of low material strength and a casting defect was a potential source of unexpected fracture during service, because the component was under pressure from steam. Recommendations included removing other dryer heads exhibiting similar discontinuities...
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.c9001522
EISBN: 978-1-62708-235-8
... assembly revealed tensile properties well below the allowable design values. Radiology and CT evaluations revealed no casting defects. Optical microscopy revealed porosity uniformly distributed throughout the casting on the order of 0.1 mm pore diam. Scanning electron microscopy revealed elongated pores...
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
.... It was concluded that the strength of the castings had been compromised by the presence of the casting defects. Modification of the gating system for casting was recommended to eliminate the hot tear zone. It was also suggested that the balance of the castings from the same manufacturing lot be radiographically...
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
.... It presents the international classification of common casting defects in a tabular form. austenitic steels cast aluminum alloys cast iron casting casting defects casting design castings centrifugal casting corrosion-resistant castings discontinuities ductile iron gravity die casting gray...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c0089526
EISBN: 978-1-62708-218-1
.... Controlled pouring temperatures, improved design and use of chills were recommended to avoid the casting defects. Casting defects Cracking (fracturing) Cylinder heads Microporosity Shrinkage Gray iron Casting-related failures A cracked cylinder head was removed from an engine after...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001084
EISBN: 978-1-62708-214-3
.../vane junction. Sections cut from the impeller were examined visually and by SEM fractography. Microstructural, chemical, and surface analyses and surface hardness tests were conducted on the impeller segments. The results indicated that the impeller failed in fatigue with casting defects increasing...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001016
EISBN: 978-1-62708-236-5
... casting defect. Further investigation of this defect was not possible. Cutting a piece off of the way would have precluded repair. Fig. 1 There is a major casting defect in this fracture surface. But evidence indicated that the part failed because improper procedures were used in shipping...