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Tearing

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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
... Abstract The impeller of a 4 ft. diam extraction fan driven by a 120 hp motor at 1,480 rpm. disrupted suddenly. The majority of the vanes had become detached where they were welded to the plates. At other locations, separation of the vanes was accompanied by tearing of the adjacent plate...
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.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...
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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. 10 Morphology of metal loss. The tube shows ductile tearing. More
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Published: 01 June 2019
Fig. 3 Three superimposed regions illustrating tearing of the back plate. 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: 01 December 1992
Fig. 7 SEM micrograph of ductile tearing in area A. 335×. More
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Published: 01 December 1993
Fig. 3 Possible tearing mechanism during trimming. The punch pulls part of the material with it, causing stresses at the grain boundaries. Grains may separate and tear if the elastic limits reached. More
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Published: 01 June 2019
Fig. 6 Transgranular cleavage (lower left) and intergranular tearing (upper right), crack initiation site of Figure 5 . More
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Published: 01 June 2019
Fig. 6 Thin arm (#98) fracture surface showing ductile tearing (100×) More
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Published: 01 June 2019
Fig. 7 Thin arm (#98) fracture surface showing ductile tearing (1000×) 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
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001029
EISBN: 978-1-62708-214-3
... Fig. 1 Both sides of an as-received actuator casting. Arrow (b) indicates the hot tear cracks. Fig. 2 Crack (arrows) in the casting that developed during torque testing. 1.1×. Fig. 3 (a) SEM micrograph showing the over all fracture surface in the crack initiation area. 7.6...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c0046155
EISBN: 978-1-62708-233-4
... in the rubbed and galled area. Electron fractography confirmed that cracking had initiated at a region of tearing and that the cracks had propagated by fatigue. Mechanical properties of all specimens exceeded the minimum values specified for the post. This evidence supports the conclusion that fatigue...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c0047586
EISBN: 978-1-62708-236-5
... typical of exposure to air when very hot. Several additional subsurface cracks, typical of hot tears, were observed in and near the weld. There had been too much local heat input in making the repair weld. The result was localized thermal contraction and hot tearing. The cracking of the repair weld...
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
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001065
EISBN: 978-1-62708-214-3
... are a near the weld on a weld joint specimen. The thinnest area measured approximately 0.38 mm (0.015 in.). Fig. 1 SEM micrograph of a specimen fracture surface, showing typical dimpled rupture. Fig. 2 Probable failure initiation site. (a) High-magnification fractograph of linear tear. (b...
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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