Fractography


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fractography

[‚frak′täg·rə·fē]
(metallurgy)
The microscopic examination of fractured metal surfaces.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Fractography

 

the description of fractured metal surfaces in order to analyze the causes and process of fracture. Fracto-graphic examination may be performed by the unaided eye or with the use of a magnifier, optical microscope, or electron microscope. Transmission electron microscopes are used to examine a replica of the fracture surface, whose contrast is reinforced by shadowing, that is, by depositing a layer of metal on it, rather than the fracture itself. The fracture surface itself can be studied with a scanning electron microscope. The type of fracture encountered depends on the type of stress imposed (static, impact, or variable), the conditions under which stress is applied (such as the temperature and type of medium), the nature of crack extension (intragranular or intergranular fracture), and the degree of development of plastic deformation in failure (brittle or ductile fracture).

REFERENCE

Fridman, Ia. B. Mekhanicheskie svoistva metallov, 3rd ed., vol. 1. Moscow, 1974. Chapter 11.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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References in periodicals archive ?
Post-impact fractography was performed to determine mechanisms of fracture.
Bialobrzeska et al., "Impact resistance and fractography of low-alloy martensitic steels," Arch.
Kainer, "Fractography of stress corrosion cracking of Mg-Al alloys," Metallurgical and Materials Transactions A, vol.
The analysis of crank shaft failure reveals a crack at surface originated due to sharp boundaries of primary type I graphite nucleated in pearlitic matrix may be the root cause of fatigue failure based on the fractography analysis [2].
As shown in Figures 15(a) and 15(b), the overall shape of the shear fractography section performs a wavy terrain extending to farther positions.
He, "Analysis on low cycle fatigue properties and fractography of TC25 titanium alloy," Chinese Journal of Solid Mechanics, vol.
The fracture patterns indicated a posterolateral to anteromedial directed force and were consistent with the fractography findings that the fracture initiated on the anteromedial surface of the bone.
Key Words: Stainless steel endodontic K files, fractography, ductility, brittleness.
(29) indicated that scanning electron microscopy observations of clinically failed instruments, suggestions are offered for improving their fracture resistance and can be used as method for fractography analysis.
As indicated by the circle in the fractography image in Figure 11(b), a cleavage-type transcrystalline fracture appeared in the interdendritic region.
The different testing, namely, tensile, hardness, flexural strength, density, fractography, corrosion, and wear test, was conducted on the standard samples prepared [16].