Skip Nav Destination
Close Modal
Search Results for
crack pattern
Update search
Filter
- Title
- Authors
- Author Affiliations
- Full Text
- Abstract
- Keywords
- DOI
- ISBN
- EISBN
- Issue
- ISSN
- EISSN
- Volume
- References
Filter
- Title
- Authors
- Author Affiliations
- Full Text
- Abstract
- Keywords
- DOI
- ISBN
- EISBN
- Issue
- ISSN
- EISSN
- Volume
- References
Filter
- Title
- Authors
- Author Affiliations
- Full Text
- Abstract
- Keywords
- DOI
- ISBN
- EISBN
- Issue
- ISSN
- EISSN
- Volume
- References
Filter
- Title
- Authors
- Author Affiliations
- Full Text
- Abstract
- Keywords
- DOI
- ISBN
- EISBN
- Issue
- ISSN
- EISSN
- Volume
- References
Filter
- Title
- Authors
- Author Affiliations
- Full Text
- Abstract
- Keywords
- DOI
- ISBN
- EISBN
- Issue
- ISSN
- EISSN
- Volume
- References
Filter
- Title
- Authors
- Author Affiliations
- Full Text
- Abstract
- Keywords
- DOI
- ISBN
- EISBN
- Issue
- ISSN
- EISSN
- Volume
- References
NARROW
Format
Topics
Book Series
Date
Availability
1-20 of 525 Search Results for
crack pattern
Follow your search
Access your saved searches in your account
Would you like to receive an alert when new items match your search?
1
Sort by
Image
Published: 30 November 2013
Fig. 36 Characteristic X-shaped crack pattern in a grade 1045 steel crankshaft after testing in reversed torsional fatigue in a special machine, not in an engine. In this case, the original crack was in the transverse shear plane, not in the longitudinal shear plane as in Fig. 35 .
More
Image
in Fatigue and Fracture of Continuous-Fiber Polymer-Matrix Composites
> Fatigue and Fracture: Understanding the Basics
Published: 01 November 2012
Fig. 18 Micrograph showing crack pattern in matrix of [0°/90°/±45°] s carbon/epoxy laminate. Cracks in 90° plies have linked to those in ±45° plies but have not propagated to the 0° plies. Source: Ref 9
More
Image
Published: 01 November 2012
Fig. 29 Schematic of a river pattern. Crack growth is in the direction of crack coalescence. River patterns may be visible at the macroscale in organic glasses and brittle polymers but are visible only at the microscale in metallic materials. Source: Ref 13
More
Image
Published: 01 March 2006
Image
in Liquid Penetrant, Magnetic Particle, and Eddy-Current Inspection
> Inspection of Metals: Understanding the Basics
Published: 01 April 2013
Image
Published: 01 October 2011
Image
Published: 30 November 2013
Fig. 35 Close-up of a reduced area on a medium-carbon steel drive shaft showing the X-shaped crack pattern characteristic of reversed torsional fatigue. Reversed torsional fatigue causes approximately 45° spiral fatigue cracks on opposite diagonals. The original shear crack
More
Image
Published: 31 December 2020
Fig. 21 Quench cracks due to excessively large grain boundaries resulting from excessively high austenitizing temperature. Note cracking patterns associated with prior coarse austenite grain boundaries. Source: Ref 25
More
Image
in Deformation and Fracture Mechanisms and Static Strength of Metals
> Mechanics and Mechanisms of Fracture: An Introduction
Published: 01 August 2005
Fig. 2.46 Chevron patterns typical when crack propagation is fastest below the surface. It is also observed in fracture of parts having a thickness much smaller than the length or width (see middle illustration in Fig. 2.47 ).
More
Image
in Evaluation of Stress-Corrosion Cracking[1]
> Stress-Corrosion Cracking<subtitle>Materials Performance and Evaluation</subtitle>
Published: 01 January 2017
Fig. 17.5 Effect of loading method and extent of cracking or corrosion pattern on average net section stress in a uniaxially loaded tension specimen. Behavior is generally representative, but curves will vary with specific alloys and tempers. (a) Localized cracking. (b) General cracking
More
Image
Published: 01 July 1997
Fig. 3 Two radically dissimilar patterns of stage II crack growth in weldments. The crack geometry and load path in the groove welded butt joint (top left) is similar to the center cracked panel for which the stress intensity factor increases with crack growth; whereas, the crack geometry
More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090359
EISBN: 978-1-62708-266-2
... evaluation (NDE) techniques because of its treelike branching pattern and its location in the heat-affected zone within the weld. As the chapter explains, by optimizing excitation and reflected waveforms, switching to dual-element sensing, properly orienting the scanning path, and using crack-tip diffraction...
Abstract
This chapter describes how ultrasonic testing came to be a viable method for evaluating intergranular stress-corrosion cracking (SCC) in large-diameter stainless steel pipe welds in boiling water reactor service. Intergranular SCC can be difficult to detect using nondestructive evaluation (NDE) techniques because of its treelike branching pattern and its location in the heat-affected zone within the weld. As the chapter explains, by optimizing excitation and reflected waveforms, switching to dual-element sensing, properly orienting the scanning path, and using crack-tip diffraction and amplitude-drop techniques, the height, length, and location of intergranular cracks can be accurately determined anywhere along the walls of the pipe as well as in weld areas.
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270130
EISBN: 978-1-62708-301-0
... the stereobinocular and SEM. Under the SEM, only a mud-crack pattern was seen on the fracture surface of the heavily oxidized bolts (e.g., bolt No. 2, Fig. CH28.2 ). The other bolts, 1, 4, and 5, showed a clear pattern of intergranular cracking, with a rock candy appearance. Figure CH28.3 is a typical SEM...
Abstract
An aircraft crashed following the loss of yaw control in full airborne flight. The subsequent discovery of broken shutter bolts in the rear pitch reaction control valve led to an inspection campaign that found bolt failures of a similar nature in valves on several other aircraft. The bolts were removed and analyzed to determine the mode and cause of failure. Based on the results of macroscopy, scanning electron fractography, metallographic examination, and chemical analysis, the failures were caused by stress corrosion cracking, and in one case, overtightening.
Book Chapter
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270025
EISBN: 978-1-62708-301-0
... Abstract This chapter provides an overview of the tools and techniques used to examine failure specimens and the wealth of information that can be obtained from fracture surfaces, cracks, wear patterns, and other such features. It discusses the use of metallography, fractography, and optical...
Abstract
This chapter provides an overview of the tools and techniques used to examine failure specimens and the wealth of information that can be obtained from fracture surfaces, cracks, wear patterns, and other such features. It discusses the use of metallography, fractography, and optical and electron microscopy. It presents a number of images recorded using these methods and explains what they reveal about the mode of fracture and the state of the component prior to failure.
Book Chapter
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270065
EISBN: 978-1-62708-301-0
... Abstract An aircraft was heavily damaged when it was forced to land due to a throttle malfunction. Investigators determined that one of the studs linking the throttle to the engine fractured from fatigue, initiated by cracks formed during a riveting procedure. This chapter provides a summary...
Abstract
An aircraft was heavily damaged when it was forced to land due to a throttle malfunction. Investigators determined that one of the studs linking the throttle to the engine fractured from fatigue, initiated by cracks formed during a riveting procedure. This chapter provides a summary of the investigation, which included the use of scanning electron fractography, along with recommendations on acceptable hole patterns for rivets.
Book Chapter
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270120
EISBN: 978-1-62708-301-0
... indicated that cracking initiated at the outer periphery of the strut and propagated inward until overload fracture occurred. SEM imaging revealed fatigue striations along the outer periphery and dimples elsewhere, indicative of tensile overload. Based on these observations, investigators concluded...
Abstract
This chapter describes an investigation following an aircraft accident in which the main undercarriage struts had failed. Visual examination revealed that the starboard strut fractured about 13 cm from the end nearest the underside of the wing. A close-up view of the fracture surface indicated that cracking initiated at the outer periphery of the strut and propagated inward until overload fracture occurred. SEM imaging revealed fatigue striations along the outer periphery and dimples elsewhere, indicative of tensile overload. Based on these observations, investigators concluded that the starboard strut failed by fatigue, which overloaded the port side strut as evidenced by its slant type fracture pattern.
Book Chapter
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780417
EISBN: 978-1-62708-281-5
...-rich regions, where river patterns are not usually noted. Both river patterns and matrix feathering are not only indicative of mode I tension loading in brittle composite materials, but have also been noted to be indicative of crack-growth direction. Crack-growth direction can be ascertained by noting...
Image
Published: 30 November 2013
Fig. 9 (a) Sketch of pattern of brittle fracture in a moderately hard, strong metal. The fracture originated at a sharp stress concentration that grew to the critical flaw size for that metal. The sharp stress concentration is frequently, though not always, a fatigue crack or a stress
More
Image
Published: 01 April 2013
the search unit in an arc about the location of the flaw. (c) Display pattern obtained from a slag inclusion as the result of swiveling the search unit on a fixed point. (d) Display pattern obtained from a crack, using the same swiveling search-unit movement as in (c). Source: Ref 1
More
Image
Published: 01 November 2012
concentration that grew to the critical flaw size for that metal. The sharp stress concentration is frequently, although not always, a fatigue crack or a stress-corrosion crack. Note the fan-shaped pattern radiating from the origin region in the upper left corner. When viewed under the electron microscope
More
1