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weld discontinuities

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Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001472
EISBN: 978-1-62708-173-3
...Abstract Abstract This article provides an overview of the types of weld discontinuities that are characteristic of specialized welding processes. These welding processes include electron-beam welding, plasma arc welding, electroslag welding, friction welding, resistance welding, and diffusion...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003509
EISBN: 978-1-62708-180-1
...Abstract Abstract This article briefly reviews the general causes of weldment failures, which may arise from rejection after inspection or failure to pass mechanical testing as well as loss of function in service. It focuses on the general discontinuities observed in welds, and shows how some...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002367
EISBN: 978-1-62708-193-1
... Axial Corners 1(F) Plain plate, flame-cut edges Axial Edges 2 Rolled I-beam Bending Corners 2A Riveted I-beam Bending Holes 3 Longitudinally welded plate, as-welded Axial Ripple 3(G) Longitudinally welded plate, weld ground Axial Corners or discontinuity 4 Welded I...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005588
EISBN: 978-1-62708-174-0
... product, after fusion welding, may contain physical discontinuities due to excessively rapid solidification, adverse microstructures due to inappropriate cooling, or residual stress and distortion due to the existence of incompatible plastic strains. To analyze these problems, this article presents...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001818
EISBN: 978-1-62708-180-1
...Abstract Abstract This article discusses the effect of using unsuitable alloys, metallurgical discontinuities, fabrication practices, and stress raisers on the failure of a pressure vessel. It provides information on pressure vessels made of composite materials and their welding practices...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001477
EISBN: 978-1-62708-173-3
.... Since the early 1980s, a number of fracture mechanics-based assessment procedures have been developed that enable the significance of weld discontinuities to be assessed on a “fitness-for-service” basis. Using this concept, a structure is considered to be fit for service if it can be operated safely...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002384
EISBN: 978-1-62708-193-1
... Defects and discontinuities in welded joints Fig. 2 Fracture paths for welded steel structures Fig. 3 Schematic representation of a crack growing in service under fatigue loading. Failure occurs if a f ≥ a c . a 0 , start-of-life defect size; a f , defect size due to fatigue...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005631
EISBN: 978-1-62708-174-0
... is a fusion process, the evaluation of weld quality is similar to other allied processes. Table 3 and Fig. 10 and 11 illustrate the common types of discontinuities that are assessed for weld quality of an application. Common types of discontinuities Table 3 Common types of discontinuities...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002386
EISBN: 978-1-62708-193-1
... with a through-thickness crack (β = 1) Fig. 20 Weld discontinuity in leak-before-break analysis (see text, Case 2 of Example 4 ) Fig. 21 Operating stress map with net section yield lines and critical stresses for ASTM A285C weldment Fig. 23 Elliptical function vs. aspect ratio...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001343
EISBN: 978-1-62708-173-3
.... Nondestructive Characterization Techniques Internal Characterization Requiring Destructive Procedures Weld Characterization Examples Acknowledgment References References 1. Standard Welding Terms and Definitions, ANSI/AWS A3.0-89, AWS, 1989 2. Weld Discontinuities , Metals Handbook...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003539
EISBN: 978-1-62708-180-1
... iron. Fatigue in this relatively brittle gray iron is macroscopically indistinguishable from overload fracture. Source: Ref 7 Fig. 11 Subsurface fatigue origin at gross welding discontinuity. Source: Ref 13 Fig. 27 Discrete bands of fast overload fracture (dull gray) separated...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006776
EISBN: 978-1-62708-295-2
... brittle gray iron is macroscopically indistinguishable from overload fracture. Source: Ref 7 Fig. 11 Subsurface fatigue origin at gross welding discontinuity. Source: Ref 13 Fig. 27 Discrete bands of fast overload fracture (dull gray) separated by bands of progressive fatigue...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006450
EISBN: 978-1-62708-190-0
..., who pioneered in the development of eddy-current systems for the inspection of welded steel tubing. He began his work in 1930 and by 1935 had progressed to an inspection system that included a separate primary energizing coil, differential secondary detector coil, and a dc magnetic-saturating solenoid...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006468
EISBN: 978-1-62708-190-0
..., inclusions, open roots, or inadequate joint penetration Circular field can be selectively directed to weld area by prod placement. In conjunction with half-wave current and dry powder, provides excellent sensitivity to subsurface discontinuities. Prods, cables, and power packs can be brought to inspection...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003227
EISBN: 978-1-62708-199-3
... overall strength, a greater cross section, or fewer internal discontinuities may be needed. The features that help identify the crack origin, such as concentric fibrous marks, radial marks, and beach marks, and the fracture-surface characteristics that show the direction of crack propagation...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005330
EISBN: 978-1-62708-187-0
... as a maximum size per discontinuity, minimum separation between discontinuities, maximum number of discontinuities per area, and minimum size to count as a discontinuity; these are stipulated in the acceptance. Acceptance can also be based on some form of comparison to a standard. In-process welding is common...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003227
EISBN: 978-1-62708-199-3
..., if the crack origin is at the surface, surface alteration by such means as case hardening, shot peening, cold working of holes, and corrosion protection may eliminate recurrence of the problem. If the origin is subsurface, higher overall strength, a greater cross section, or fewer internal discontinuities may...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006758
EISBN: 978-1-62708-295-2
...) or a single material defect issue rather than design, material process, or human factor related factors. Cracking may also be due to loading conditions coupled with discontinuities such as, porosity, weld and casting discontinuities and inclusions, laps and delaminations. Without prior knowledge...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003774
EISBN: 978-1-62708-177-1
.... Dallam C.R. et al. , Characterization of Welds , Welding, Brazing, and Soldering , Vol 6 , ASM Handbook , ASM International , 1993 , p 97 – 106 52. Overview of Weld Discontinuities , Welding, Brazing, and Soldering , Vol 6 , ASM Handbook , ASM International , 1993 , p 1073 – 1080...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003785
EISBN: 978-1-62708-177-1
... Orientation in the Weld Fusion Zone , Weld. J. , Vol 45 ( No. 2 ), Feb 1966 , p 855s – 895s 3. Easterling K. , Introduction to the Physical Metallurgy of Welding , Butterworths , 1983 4. Kujanpaa V.P. , Weld Discontinuities in Austenitic Stainless Steel Sheets—Effects...