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Fractography

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Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 30 January 2024
DOI: 10.31399/asm.hb.v12.a0006841
EISBN: 978-1-62708-387-4
... Abstract This article discusses fractures and cracks due to ancient artifact weaknesses. It provides several case studies to aid the appreciation of fractography as a diagnostic technique and to understand the importance of cracking. These case histories concern ancient gold and silver alloys...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 30 January 2024
DOI: 10.31399/asm.hb.v12.a0006848
EISBN: 978-1-62708-387-4
... Abstract Quantitative fractography (QF) is the examination and characterization of fracture surfaces of failed or broken-open components and specimens. This article provides examples of the application of QF to evaluate real-life fatigue failures and also a comprehensive guideline chart...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 30 January 2024
DOI: 10.31399/asm.hb.v12.a0006877
EISBN: 978-1-62708-387-4
... Abstract This article discusses several examples of fatigue load histories that intentionally create artificial fracture-surface markings during testing such that they are measurable by post-test quantitative fractography (QF). It reviews a number of methods for providing fatigue fracture...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 30 January 2024
DOI: 10.31399/asm.hb.v12.a0006947
EISBN: 978-1-62708-387-4
... Abstract This article provides an overview of polymer fractography, with examples of various fracture surfaces created under diverse loading conditions. The focus is on the interpretation of polymer fracture-surface features in light of the unique viscoelastic nature of polymers. The article...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006870
EISBN: 978-1-62708-395-9
... Abstract This article examines the concept of fractography as applied to elastomeric rubbery materials. It considers four general categories of physical root failure causes: design defects, material defects, manufacturing defects, and service life anomalies. Examples of real-world failures...
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...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003466
EISBN: 978-1-62708-195-5
... materials. environmentally induced fracture fractography interlaminar fracture mechanical load thermoplastic matrices thermoset resin translaminar fracture FRACTURE SURFACES are examined during most investigations of failed structural components because these surfaces provide an actual...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003468
EISBN: 978-1-62708-195-5
.... It also describes the evaluation of the long fatigue crack growth behavior of MMCs by using the test methods and specimens that are used for unreinforced metallic alloys. Fractography of MMCs under plane-strain conditions is also described with information on the observed features of MMC fatigue fracture...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003226
EISBN: 978-1-62708-199-3
... Abstract Fractography is the systematic study of fractures and fracture surfaces. It is a useful tool in failure analysis and provides a means for correlating the influence of microstructure on the fracture mode of a given material. This article discusses the preservation, preparation...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003227
EISBN: 978-1-62708-199-3
... Abstract This article describes various evaluation techniques of fractography such as visual inspection, macroscopic and microscopic examinations that are used to resolve different aspects of failure. It gives a brief description and pictorial representation of various defects leading...
Series: ASM Handbook Archive
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0001830
EISBN: 978-1-62708-181-8
... Abstract The purpose of fractography is to analyze fracture features and attempt to relate the topography of the fracture surface to the causes and/or basic mechanisms of fracture. This article reviews the historical development of fractography, from the early studies of fracture appearance...
Series: ASM Handbook Archive
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0001837
EISBN: 978-1-62708-181-8
... Abstract The principal objective of quantitative fractography is to express the characteristics of features in the fracture surface in quantitative terms, such as the true area, length, size, spacing, orientation, and location. This article provides a detailed account of the development of more...
Series: ASM Handbook Archive
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.9781627081818
EISBN: 978-1-62708-181-8
Series: ASM Handbook Archive
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0005697
EISBN: 978-1-62708-181-8
... "Quantitative Fractography" in this Volume. Mg megagram min minimum; minute MJ megajoule mL milliliter mm millimeter mol% mole percent MPa megapascal mph miles per hour N newton N fatigue life (number of cycles); normal solution Nr number of cycles to failure NA numerical aperture NACE National Association...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 30 January 2024
DOI: 10.31399/asm.hb.v12.9781627083874
EISBN: 978-1-62708-387-4
Image
Published: 01 January 2002
Fig. 13 Sheared-off cast cobalt-chromium-molybdenum screw. SEM fractography. (a) Overview of portion of rough fracture surface. (b) Area with fracture planes of three differently oriented grains (single arrow, a). (c) Shearing structures and dimples in grain identified by the numeral 1 in (b More
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Published: 01 November 1995
Fig. 19 Labelled Weibull graph that displays both strength and fractography data for a 99.9% alumina tested in three-point flexure at room temperature. σ 0 , characteristic strength; m , Weibull modulus More
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Published: 01 January 1996
Fig. 42 Fractography of fatigue crack propagation at intermediate (region 2) and high (region 3) growth rates in steels tested in moist air at R = 0.1. See text for details about regions. (a) Ductile striations in 9Ni-4Co steel at Δ K = 30 MPa m . (b) Additional cleavage fracture More
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Published: 30 August 2021
Fig. 14 (a) Fracture surface and (b) SEM fractography of a coil that failed due to excessive decarburization More
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Published: 30 January 2024
Fig. 11 SEM and deep-focus optical fractography examples of changes in fatigue fracture surface orientations due to load history variations. (a) Changes in overall fracture planes for AA7075-T6 aluminum alloy thin plate when a simple flight-by-flight variable-amplitude load sequence More