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fusion welding

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Published: 01 June 2019
Fig. 27 Local attack at fusion welded joint More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0047583
EISBN: 978-1-62708-217-4
... Abstract An aircraft fuel-nozzle-support assembly exhibited cracks along the periphery of a fusion weld that attached a support arm to a fairing in a joint that approximated a T-shape in cross section. The base metal was type 321 stainless steel. Examination showed a good-quality weld...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001909
EISBN: 978-1-62708-235-8
... Inspection was performed for the MK#83 and MK#84 conical bomb fins. It was noted upon visual examination at the manufacturing plant that the chamfered butt welds (fusion weld) and the plug welds (resistance weld) showed substandard workmanship. The plug welds attach the outer skin to the inner spar, while...
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Published: 30 August 2021
Fig. 44 Incomplete fusion (lack of fusion, or LOF) in (a) a single-V-groove weld and (b) a double-V-groove weld. Incomplete penetration (lack of penetration, or LOP) in (c) a single-V-groove weld and (d) a double-V-groove weld More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001429
EISBN: 978-1-62708-227-3
.... Crankshafts Fillet welds Stress relieving Welded steel Joining-related failures Fatigue fracture The following case illustrates very effectively the danger of attempting to reclaim highly stressed parts by the application of fusion welding. It concerns two Diesel engine crankshafts of similar...
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Published: 01 June 2019
Fig. 2 Appearance of failed weld region, with incomplete fusion of consumable weld metal insert. More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0047710
EISBN: 978-1-62708-225-9
... a cosmetic weld pass on top of the initial full-penetration weld. There were no other known service failures of gears were welded by this method. One zone of the welded joint showed incomplete fusion, surrounded by two zones containing fatigue beach marks This indicated that the incomplete-fusion zone...
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Published: 01 June 2019
Fig. 6 Grain Morphology of Fusion Zone Indicating Teardrop-Shaped Weld Pool (a) and Schematic of Moving Weld Pool (b) [ 2 ]. More
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Published: 01 June 2019
Fig. 6 Photomicrographs taken from the fusion zone of the weld from (A) and discolored test plate and (B) surface replica of the cylinder weldment. More
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Published: 01 January 2002
Fig. 19 Methods used to reduce lamellar tearing. (a) Angling the weld fusion line to avoid shrinkage stresses in the through-thickness direction. (b) Use of smaller partial-penetration welds to reduce joint restraint. (c) Placement of welding beads on the thinner plate (when welding plates More
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Published: 01 January 2002
Fig. 40 Incomplete fusion in (a) a single-V-groove weld and (b) a double-V-groove weld. Incomplete penetration in (c) a single-V-groove weld and (d) a double-V-groove weld More
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Published: 01 January 2002
Fig. 41 Causes and cures of incomplete fusion in welds More
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Published: 01 January 2002
Fig. 43 Incomplete fusion in a pulsed gas metal arc spot weld involving ERNiCu-7 (Monel 60), 0.89 mm (0.035 in.) diameter filler metal, copper-nickel to steel weldment. Etchant, 50% nitric-50% acetic acid. (a) View showing IF flaw. 30×. (b) View showing that IF was eliminated by tapering More
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Published: 30 August 2021
Fig. 5 Lap seam weld with oxides and areas of incomplete fusion, indicated by arrows, along the characteristic angled bond line More
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Published: 01 December 1993
Fig. 2 Optical micrographs showing weld profiles and extent of fusion More
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Published: 01 December 1993
Fig. 5 Photomicrograph showing crack at toe of weld. Note voids along fusion zone and intergranular corrosion within base metal and weld metal. 15.75× More
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Published: 01 December 1992
Fig. 7 Hard martensitic (acicular) transition at weld fusion line in sample B. 324×. More
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Published: 30 August 2021
Fig. 26 Thermal fatigue cracking at weld fusion line between grade 91 pipe and butter layer. Source: Ref 38 . Courtesy of C. Matherne More
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Published: 30 August 2021
Fig. 45 Causes and cures of incomplete fusion of welds More
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
... of arc welds. Mechanical and environmental failure origins related to other types of welding processes are also described. The article explains the cause and effects of process-related discontinuities including weld porosity, inclusions, incomplete fusion, and incomplete penetration. Different fitness...