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Lamellar tearing

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001141
EISBN: 978-1-62708-227-3
... examination of sections cut from the cracked area identified lamellar tearing as the principle cause of the cracking. This was surprising in 6 mm thick hull plates. Corrosion fatigue and general corrosion also contributed to hull plate perforation. Although it is probable that more lamellar tears exist near...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0089793
EISBN: 978-1-62708-235-8
... the main crack had propagated parallel to the fusion boundary along the subcritical HAZ and was associated with long stringers of type II manganese sulfide (MnS) inclusions. This supported the conclusion that the weld failed by lamellar tearing as a result of the high rotational strain induced at the root...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001442
EISBN: 978-1-62708-221-1
... through the fillet welds and zone showed lamellar tearing, which confirmed that failure had occurred in weld metal adjacent to the fusion face of the fillet to the vane. Results of the investigation indicated that the primary cause of failure of the impeller was the development of fatigue cracks from...
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Published: 01 January 2002
Fig. 19 Methods used to reduce lamellar tearing. (a) Angling the weld fusion line to avoid shrinkage stresses in the through-thickness direction. (b) Use of smaller partial-penetration welds to reduce joint restraint. (c) Placement of welding beads on the thinner plate (when welding plates More
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Published: 01 January 2002
Fig. 50 Lamellar tearing in the HAZ of a carbon-manganese steel corner joint. Etched with 2% nital More
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Published: 01 January 2002
Fig. 29 Lamellar tearing at root of weld for shroud-support ring. More
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Published: 01 June 2019
Fig. 3 Lamellar tearing at root of weld for shroud-support ring. More
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Published: 01 June 2019
Fig. 4 Detached vane with portion of back plate showing lamellar tearing. More
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Published: 30 August 2021
Fig. 46 Lamellar tearing at root of weld for shroud-support ring More
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Published: 30 August 2021
Fig. 21 Lamellar tearing in the heat-affected zone of a carbon-manganese steel corner joint. 2% nital etch More
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Published: 01 January 2002
Fig. 30 Lamellar tear beneath a T-joint weld that joined two low-carbon steel plates. (a) Fractograph of lamellar tear showing separation that has followed flattened inclusions. Approximately 0.3×. (b) Section through fracture (top), which occurred in the coarse-grain reaustenitized region More
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Published: 01 January 2002
Fig. 49 Lamellar tear caused by thermal contraction strain More
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Published: 01 June 2019
Fig. 12 Slice bend test showing lamellar tears. More
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Published: 01 June 2019
Fig. 15 Lamellar tears showing deformation and inclusion fragments. More
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Published: 01 June 2019
Fig. 3 Lamellar tear — cross section at 100× More
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Published: 01 June 2019
Fig. 4 West transition plate: Close up of lamellar tear fracture More
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Published: 30 August 2021
Fig. 20 Lamellar tear caused by thermal contraction strain in the through-thickness direction More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001139
EISBN: 978-1-62708-221-1
... of the failure include the use of bolts in lieu of welding, a welding schedule that reduces the propensity of lamellar tearing, and the use of an alloy that precludes lamellar tearing. However, if abuse of the crane was the primary cause of failure, none of these recommendations would have prevented...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001588
EISBN: 978-1-62708-221-1
... ductility direction of the transition joint plate, lamellar tearing of plate material occurred at the boxed I-beam fillet weld attachment. Brittle fracture of this joint precipitated global collapse of the truss structure. Bridges (structures) Ore conveyors Structural steel Brittle fracture...
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Published: 01 June 2019
Fig. 1 Failure of double fillet welded joint between vane and back plate disclosing lamellar tearing. More