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Spalling

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Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001849
EISBN: 978-1-62708-241-9
...Abstract Abstract Spalled fragments from the work rolls of a steel bar straightening machine were received for failure analysis. Visual inspection coupled with optical and scanning electron microscopy were used as the principal analytical techniques for the investigation. Fractographic analysis...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001532
EISBN: 978-1-62708-232-7
...Abstract Abstract Work rolls made of indefinite chill double-poured (ICDP) iron are commonly used in the finishing trains of hot-strip mills (HSMs). In actual service, spalling, apart from other surface degeneration modes, constitutes a major mechanism of premature roll failures. Although...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001502
EISBN: 978-1-62708-234-1
...Abstract Abstract A portion of two large spur tooth bull gears made from 4147H Cr-Mo alloy steel that had spalling teeth was submitted for evaluation. The gears were taken from a final drive wheel reduction unit of a very large open-pit mining truck. The parts had met the material and initial...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003566
EISBN: 978-1-62708-180-1
...Abstract Abstract This article briefly reviews the analysis methods for spalling of striking tools with emphasis on field tests conducted by A.H. Burn and on the laboratory tests of H.O. McIntire and G.K. Manning and of J.W. Lodge. It focuses on the metallography and fractography of spalling...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001271
EISBN: 978-1-62708-215-0
... the chipped area on the chamfer and the other from the undamaged area on the chamfer. The shape and texture of the fracture surfaces were typical of spalling. The fracture was conchoidal and exhibited a complete lack of plastic deformation. White etching bands that intersected the face and chamfer were...
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Published: 01 December 2019
Fig. 7 Optical micrograph showing evidence of microscopic spalling formation (sample 1) More
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Published: 01 January 2002
Fig. 24 More severe material fracture/spalling on surface of disk made from tougher, medium-carbon alloy steel More
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Published: 01 January 2002
Fig. 18 Spalling of thermally sprayed WC-Co coating More
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Published: 01 January 2002
Fig. 8 Spalling fatigue failure resulting from artificially induced ring/cone cracks (SEM micrographs). (a) Single spall. (b) Double spall More
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Published: 01 January 2002
Fig. 11 Subsurface observation of spalling fatigue failure (optical micrograph) More
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Published: 01 January 2002
Fig. 2 First fixture used by Lodge to simulate spalling. Source: Ref 4 More
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Published: 01 January 2002
Fig. 3 Second fixture used by Lodge to simulate spalling. Courtesy of J.E. McGarry More
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Published: 01 January 2002
Fig. 6 Device used by Velez and Powell to investigate the spalling of 1060 steel. Source: Ref 5 More
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Published: 01 January 2002
Fig. 31 Another example of spalling caused by a quench crack. (a) 7×. (b) 28× More
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Published: 01 January 2002
Fig. 16 Damage from surface deterioration and spalling in the drawn-cup outer raceway of a needle-roller bearing because the rollers were overloaded at one end. More
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Published: 01 January 2002
Fig. 20 Spalling damage on the end of a shaft that served as roller-bearing raceway. The spalling was initiated at subsurface inclusions. More
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Published: 01 January 2002
Fig. 7 The surface of an AISI A4 primer cup plate showing spalling at one of the 3.2-mm ( 1 8 -in.) diam holes made by EDM. The surface was etched with 10% aqueous nitric acid to bring out the influence of the EDM operation at the spall. 2.5× More
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Published: 01 January 2002
Fig. 25 Schematics of the degradation mechanisms of spalling, oxidation, and inward diffusion for coatings More
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Published: 01 January 2002
Fig. 29 Subsurface cracking that subsequently resulted in spalling at a gear-tooth edge. Unetched section of a carburized AMS 6260 steel gear tooth. Cracking initiated in the transition zone between the carburized case and the core. 500× More
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Published: 01 January 2002
Fig. 30 Spalling on a tooth of a steel spur sun gear shaft. (a) Overall view of spalled tooth. (b) Micrograph of an unetched section taken through the spalled area showing progressive subsurface cracking. 100× More