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discontinuities
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Book Chapter
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930057
EISBN: 978-1-62708-359-1
... Abstract Discontinuities are interruptions in the desirable physical structure of a weld. This article describes the types of weld discontinuities that are characteristic of the principal welding processes. Discontinuities covered are metallurgical discontinuities, discontinuities associated...
Abstract
Discontinuities are interruptions in the desirable physical structure of a weld. This article describes the types of weld discontinuities that are characteristic of the principal welding processes. Discontinuities covered are metallurgical discontinuities, discontinuities associated with specialized welding processes, and base metal discontinuities. In addition, information on the common inspection methods used to detect these discontinuities is provided.
Book Chapter
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870285
EISBN: 978-1-62708-314-0
... Abstract This chapter discusses the effect of fiber length and orientation on the strength and stiffness of discontinuous-fiber composites. It also describes several fabrication processes, including spray-up, compression molding, reaction injection molding, and injection molding...
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in Liquid Penetrant, Magnetic Particle, and Eddy-Current Inspection
> Inspection of Metals: Understanding the Basics
Published: 01 April 2013
Fig. 10 (a) Single and (b) double prod contacts. Discontinuities are detected by a magnetic field generated between the prods. Source: Ref 2
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in Liquid Penetrant, Magnetic Particle, and Eddy-Current Inspection
> Inspection of Metals: Understanding the Basics
Published: 01 April 2013
Fig. 27 Several fabricated discontinuities used as reference standards in eddy current inspection. ASTM standards for eddy current testing include E 215 (aluminum alloy tube), E 376 (measurement of coating thickness), E 243 (copper and copper alloy tube), E 566 (ferrous metal sorting), E 571
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Published: 01 April 2013
Fig. 6 Typical discontinuities found in aluminum alloy forgings. Source: Ref 1
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Published: 01 April 2013
Fig. 13 Comparisons of discontinuities at normal orientation versus radial orientation. (a) Discontinuity normal to sound energy, almost total reflection of energy back toward transducer. (b) Discontinuity at 0° with respect to 45° sound energy path, almost no energy reflected back toward
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Published: 01 April 2013
Fig. 5 Weld discontinuities affecting weld shape and contour. (a) Undercut and overlapping in a fillet weld. (b) Undercut and overlapping in a groove weld. (c) and (d) Underfill in groove welds. Source: Ref 1
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Published: 01 November 2011
Fig. 5.20 Weld discontinuities affect weld shape and contour: (a) undercut and overlapping a fillet weld, (b) undercut and overlapping in a groove weld, and (c) and (d) underfill in groove welds. Source: Ref 5.9
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Published: 01 September 2008
Fig. 1 Schematic illustration of common types of discontinuities in welds. Reproduced with permission of the American Welding Society. See also Table 1 . Source: Ref 1
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Published: 01 November 2012
Fig. 19 Weld discontinuities affect weld shape and contour. (a) Undercut and overlapping a fillet weld. (b) Undercut and overlapping in a groove weld. (c) and (d) Underfill in groove welds. Source: Ref 14
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Published: 01 July 1997
Fig. 5 Weld discontinuities affecting weld shape and contour. (a) Undercut and overlapping in a fillet weld. (b) Undercut and overlapping in a groove weld. (c) and (d) Underfill in groove welds
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Published: 01 August 1999
Fig. 12.6 (Part 2) (d) and (e) Artificial discontinuity in a billet heated at 1200 °C for 15 min, hot rolled. 1% nital. 250×. (f) Artificial discontinuity in a billet heated at 1200 °C for 5 h, hot rolled. 1% nital. 250×.
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in Mechanical Work of Steels—Cold Working
> Metallography of Steels: Interpretation of Structure and the Effects of Processing
Published: 01 August 2018
Fig. 12.1 Engineering stress-strain curve for a steel that does not show discontinuous yield. After plastic deformation starts, the force required to continue deformation increases (and thus so does the engineering stress) up to the start of the specimen “necking.” After this point, work
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in Mechanical Work of Steels—Cold Working
> Metallography of Steels: Interpretation of Structure and the Effects of Processing
Published: 01 August 2018
Fig. 12.2 Engineering stress-strain curve for a steel that shows discontinuous yielding. The region of discontinuous yielding is shown. During the heterogeneous deformation that occurs with discontinuous yielding, Lüders bands are formed ( Fig. 12.3 and 12.4 ). If at point a the load
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Published: 01 April 2013
Fig. 5 Section through a heat-resistant alloy forging showing a central discontinuity that resulted from insufficient homogenization during conversion. Step machining was used to reveal the location of the rupture; original diameter is at right. Source: Ref 1
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Published: 01 December 2018
Fig. 6.5 (a) SEM micrograph of OD surface showing discontinuous fissures filled with oxide scales, 250×; and (b) SEM after metallography at location near failure showing fissures, 1000×
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Published: 01 December 2018
Fig. 6.48 Decarburization and discontinuous intergranular cracking in a carbon steel boiler tube resulting from hydrogen damage, (a) unetched view, 200× and (b) etched view, 200×
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Published: 01 December 2018
Fig. 6.51 SEM micrographs showing (a) fracture surface having fissures and discontinuous network of microcracks, 500×; and (b) coagulated fissures leading to formation of microcracks along ferrite grains, 2000×
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Published: 01 October 2012
Fig. 1.23 Cast discontinuous aluminum-matrix composites. (a) An Al-SiC p composite brake rotor. (b) Aluminum-SiC microwave radio-frequency packaging for communication satellites. Source: Ref 1.10
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