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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
... variations in roll life. The paper provides an insight into the microstructural characteristics of spalled ICED HSM work rolls, which underwent failure under similar mill operating environment in an integrated steel plant under the Steel Authority of India Limited. Microstructural features influencing ICDP...
Image
Published: 01 June 2019
Fig. 8 Unetched microstructural features observed in the turbine blade sample. (a) Primary MC carbide; (b) Sulphocarbides; (c) Script-type primary MC carbides; (d) Subsurface script-type carbides. More
Image
Published: 01 June 2019
Fig. 9 Etched microstructural features of the turbine blade sample. More
Image
Published: 01 June 2019
Fig. 19 Etched microstructural features of the investment cast MAR-M302 vane. (a) Eutectic carbide pools and script-type carbides; (b) Coarse peppery secondary carbide in the background. More
Image
Published: 01 January 2002
Fig. 5 Eroded surface of type 304 stainless steel with all microstructural features obliterated More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001571
EISBN: 978-1-62708-229-7
... treatments between 800 and 1100 deg C for periods of 1 to 100 min. Microstructural parameters in the control specimens and in those from TMI-2 were quantified. Selective etchants were used to better discriminate desired microstructural features, particularly in the cladding. This report is a progress report...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001605
EISBN: 978-1-62708-217-4
... position, topology, and details of interactions with microstructural features. The aim of this investigation was to use quantitative fractography as a tool to extract information, including striation spacing and size of the stretched zone, in order to make a direct correlation with fracture mechanic...
Book Chapter

By Arun M. Gokhale
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003536
EISBN: 978-1-62708-180-1
... Abstract The quantitative characterization of fracture surface geometry, that is, quantitative fractography, can provide useful information regarding the microstructural features and failure mechanisms that govern material fracture. This article is devoted to the fractographic techniques...
Book Chapter

By H.W. Walton
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001741
EISBN: 978-1-62708-234-1
... Abstract Butterfly-shaped microstructural features in tempered martensite in an otherwise clean steel suggested that overloading led to premature spalling of a coal-crushing plant taper bearing. Extensive rolling contact fatigue occurred because of the overload condition. The crusher...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001671
EISBN: 978-1-62708-234-1
... Abstract Important clues about the probable cause of a gun tube explosion were obtained from a fractographic and metallographic examination of the fragments. The size, distribution, and surface markings of fragments may be used to localize the explosion and deduce its intensity. Microstructural...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001755
EISBN: 978-1-62708-241-9
... in Fig. 11(c) . Fig. 11 Smearing and crack in the outer race Cage The microstructural features of the cage consist of alpha grains containing very fine nickel-silicon particles in the matrix, [ 2 ] as shown in Fig. 12 . The surface of the cage was silver coated. Fig. 12 Cage...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001657
EISBN: 978-1-62708-227-3
... surface features to obtain any meaningful fractographic results. To assess the microstructural damage incurred by the hot turbine engine components during service, metallographic samples were taken from locations adjacent to the cracked or fractured areas, such as indicated by the arrows M in Figures...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001300
EISBN: 978-1-62708-215-0
... area. The crack initiated approximately 1.5 mm (0.06 in.) below the surface. The cracking mode is transgranular, characteristic of fatigue. A microstructural feature, termed butterfly wings, was observed in the vicinity of the crack. Butterfly wings are evidence of rolling contact fatigue ( Ref 1...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001800
EISBN: 978-1-62708-241-9
... ferrite and pearlite. The longitudinal direction is indicated This microstructural feature was untempered martensite, which could only result from a highly localized, high temperature event, and self-quenching. This is consistent with an electric arc from stray current in the system. Examination...
Book Chapter

By T.L. da Silveira, I. Le May
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001737
EISBN: 978-1-62708-229-7
... layers of carbides, such that the material was extremely brittle when subjected to bending. Figure 2 illustrates this microstructural feature. Accordingly, although it was demonstrated that the casing could be welded successfully, it was suggested that the remaining useful life was effectively...
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
... Fig. 4 Fig. 5 Fig. 6 Fig. 7 Fig. 8 Fig. 9 The 10-10 Etchant is customized for the CuMgAl 2 , eutectic phase in 2024. This two-step etchant can show general microstructural features without destroying the subtle features associated with local eutectic melting...
Book Chapter

Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006757
EISBN: 978-1-62708-295-2
... Abstract Examination of a damaged component involves a chain of activities that, first and foremost, requires good observation and documentation. Following receipt and documentation, the features of damage can be recorded and their cause(s) investigated, as this article briefly describes...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001297
EISBN: 978-1-62708-215-0
.... The material properties and microstructural features were all consistent with 2014-T652 aluminum. The spar cavity should have been free of moisture or any fluid substance, if the seal had performed as designed. Conclusion and Recommendations Most Probable Cause The tail rotor blade failed by fatigue...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001667
EISBN: 978-1-62708-235-8
... on glass slides using double-sided tape to prevent damage to, or curling of, the cellulose acetate replicating tape. Several replicas were made of each area with additional etching of the surface between replications to assure that the desired microstructural features would be preserved. Metallurgical...
Book Chapter

By Iain Le May
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003522
EISBN: 978-1-62708-180-1
... Abstract This article focuses on the visual or macroscopic examination of damaged materials and interpretation of damage and fracture features. Analytical tools available for evaluations of corrosion and wear damage features include energy dispersive spectroscopy, electron probe microanalysis...