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weld geometry

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Published: 30 August 2021
Fig. 6 Effect of weld geometry on solidification cracking susceptibility. Reprinted from Ref 10 with permission from The Lincoln Electric Company More
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Published: 30 August 2021
Fig. 14 Class W and F weld geometries in accordance with British standard PD 5500. Adapted from Ref 52 More
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Published: 01 June 2019
Fig. 1 Schematic of weld joint geometry, noting the location of the observed cracking More
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Published: 01 June 2019
Fig. 1 Section of stainless steel tube/fin assembly removed from economizer. Note the weld geometry and fin weld locations. More
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001053
EISBN: 978-1-62708-214-3
... that this imperfection, although small, initiated fracture because of the local geometry and stress conditions and the low toughness of the steel. It was recommended that (1) the probability of flaws be reduced by welding over or grinding out arc strikes, (2) the local stresses be lowered by post weld stress relief...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.pulp.c0047615
EISBN: 978-1-62708-230-3
... is commonly used in black liquor recovery boilery. Fig. 1 Section of stainless steel tube/fin assembly removed from economizer. Note the weld geometry and fin weld locations. The economizer began experiencing tube leaks that resulted in unscheduled outages. These leaks occurred at the end...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001329
EISBN: 978-1-62708-215-0
... fitting and two ASME SB-148 CA 954 valve bodies) and an entire valve assembly. The leaks were found to be in the socket-weld crevice area and had resulted from dealloying. It was recommended that the weld joint geometry be modified. Control valves Cooling systems Cooling water Hydraulic valves...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001777
EISBN: 978-1-62708-241-9
..., local stress concentration as a result of geometry restrictions, and weld defects. This particular section was responsible for the load transfer between the front tie member and the boom extremity, and its failure was the main cause of the catastrophic failure of the equipment. welded flange...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001647
EISBN: 978-1-62708-235-8
... shape relating to a “wandering” arc Venting gas Elongated/tubular porosity Random distribution of porosity and/or blowout at weld tie-in Weld-joint geometry conditions with the potential to “trap” a pocket of gas Porosity located with respect to joint geometry Use of carbon steel/aluminum...
Image
Published: 15 January 2021
Fig. 12 (a) Schematic showing time-of-flight diffraction (TOFD) inspection geometry across a weld. PCS, probe center separation. (b) Portable system with manual TOFD yoke and transducers. Used with permission of Olympus More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001611
EISBN: 978-1-62708-219-8
... in. The welding orientation represents a combination of geometries 11 and 12, as characterized in Ref 1 . The 3.25 in. flange was beveled to comply with American Welding Society (AWS) D1.1-00 2 requirements, and the joining was completed with multiple weld passes using the flux cored arc welding (FCAW) process...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c0048840
EISBN: 978-1-62708-220-4
... stress analysis of the weld was made for the design geometry and geometries that included sharp notches at the shroud-support ring-to-shell junction. These analyses included a condition meant to simulate a hot spot from the missing refractory lining and a combination of hot spot plus notch. The operating...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006819
EISBN: 978-1-62708-329-4
... and rotating equipment. Often, original designs either do not properly consider fatigue or original fabrication defects, or unfavorable geometry/weld details lead to premature fatigue failure. Examples of Industry Failures Many fixed and rotating equipment fatigue failures have occurred...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001594
EISBN: 978-1-62708-229-7
... and propagate cracks through-wall in socket-welded fittings. These cracks are most likely to initiate at the weld root or at the axial weld toe. Cracks that initiate in the root are sometimes, but not always, associated with poor quality welds. Joint geometry causes a stress concentration at the tip...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006808
EISBN: 978-1-62708-329-4
... not involve melting. As shown in Fig. 2 , there are many different processes available for welding metals ( Ref 3 ), and the selection depends on the type of material, geometry, application, cost, and properties targeted at the joint, among others. When metals are welded together, acceptance criteria...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001675
EISBN: 978-1-62708-220-4
... the origin of the damage and the particular operating problem. Proper identification of the origin is fundamental knowledge for taking corrective measures. For tubing, elimination or reduction of the causes of thermal fatigue generally depends on the possibility of modifying the geometry of the system...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001352
EISBN: 978-1-62708-215-0
... a stress-concentration site because of the abrupt change in geometry. Several cracks were noticed in welds B and C, which were located at the two junctions of the ball and stem. These cracks originated from the root of the multipass weld and propagated into the base metal of the stem of the ball...
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
... geometry such as a welded assembly, or is additively manufactured, or if the part has both metallic and nonmetallic or composite sections. There are terahertz (THz) imaging, infrared (IR) imaging and laser shearography (ST) techniques available that use discontinuity location and damage mode where other...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003513
EISBN: 978-1-62708-180-1
...-plastic fracture mechanics. Such applications, however, can require sophisticated analytical techniques that require time and/or resources beyond those available to the designer or analyst. One of the first engineering tools to address this dilemma was The Welding Institute dimensionless crack tip opening...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006768
EISBN: 978-1-62708-295-2
...) and their associated tensile residual-stress maxima. In cases where the component geometry is such that stress measurements can be performed in the areas of interest (near the failure), stress mapping can be performed in both loaded and unloaded conditions. Stress-mapping techniques are routinely applied to welds...