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Welded joints

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Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001350
EISBN: 978-1-62708-215-0
... boundary and in the shell of nozzle 2 Fig. 3 Fillet weld joint between the shell and double-wall nozzles. The hatched portion in the weld was removed by lathe machining. Fig. 4 Outside surface of the shell at position A of Fig. 2 Fig. 5 Surface of a portion of an opened...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001407
EISBN: 978-1-62708-220-4
... magnitude, were responsible. As all other welds were suspect, the remedy was to remove the joints and to reweld followed by local stress relief. Butt welds Caustic soda Corrosion environments Pipes Residual stress Sodium hydroxide Stress relieving Welded steel Intergranular fracture Stress...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001411
EISBN: 978-1-62708-234-1
... Abstract A welded joint between lengths of 4 in. OD x 13 SWG copper pipe which formed part of a cold-water main failed by cracking over one-third of the circumference. Microscopic examination of the filler metal showed that it had a structure corresponding to a brass of the 60:40 type commonly...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001186
EISBN: 978-1-62708-234-1
... Welded joints Wire Cold-drawn steel Ductile fracture A steel wire of 2.3 mm diameter broke during cable twisting. The fracture occurred obliquely to the longitudinal axis of the wire and showed a constriction at the end. Therefore it was a ductile fracture. File mark type work defects were...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0089738
EISBN: 978-1-62708-235-8
... that the crack in the header tube was the result of a stress concentration at the toe of the weld joining a doubler collar to the tube. The stress concentration was caused by undercutting from poor welding technique and an unfavorable joint design that did not permit a good fit-up. Recommendations included...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0048356
EISBN: 978-1-62708-229-7
... Abstract Welded to the top of a dust bin for rigid support, a furnace water-wall tube in a new stationary boiler broke at the welded joint shortly after start-up. The tubes measured 64 mm (2.5 in.) OD by 3.2 mm (0.125 in.) wall thickness and were made of carbon steel to ASME SA-226...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0089722
EISBN: 978-1-62708-217-4
... Butt welds Design Elbows Fatigue cracking Lap welds Tubes Vibratory stresses Welded joints 321 UNS S32100 Joining-related failures Fatigue fracture The welded elbow assembly shown in Fig. 1 was part of a hydraulic-pump pressure line for a jet aircraft. The other end of the tube...
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
... Abstract Nuclear power plants typically experience two or three high-cycle fatigue failures of stainless steel socket-welded connections in small bore piping during each plant-year of operation. This paper discusses fatigue-induced failure in socket-welded joints and the strategy Texas...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001317
EISBN: 978-1-62708-215-0
... for a sufficiently long time. In this dished end, cracks were observed in the orange peel region. No abnormal features were observed visually that had bearing on the failures. Specimen 1 was removed by cutting along the circumferential weld joint (retaining some portion of the weldment with the dished end...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c0047694
EISBN: 978-1-62708-219-8
... the welded joints in wrap tests. The welded wire was annealed by resistance heating. The wire ends had a chisel shape, produced by the use of sidecutters. Tests of the heat treatment temperatures showed that the wire near the weld area exceeded 775 deg C (1425 deg F). Metallographic examination revealed...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001344
EISBN: 978-1-62708-215-0
... caustic upset in the boiler feedwater system. Tests performed on a longitudinal weld joint, which connected two adjacent tubes in the tertiary superheater bank, confirmed caustic-induced stress-corrosion cracking, promoted by the presence of residual welding stresses. Improved maintenance of check valves...
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
... Abstract A 9310 steel gear was found to be defective after a period of engine service. A linear crack approximately was discovered by routine magnetic-particle inspection of an electron beam welded joint that attached a hollow stub shaft to the web of the gear. The welding procedure had...
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Published: 01 June 2019
Fig. 27 Local attack at fusion welded joint More
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Published: 01 June 2019
Fig. 28 Scale build up and minor attack at flash welded joint More
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Published: 01 June 2019
Fig. 2 Photomacrograph of a cross section through a socket-welded joint. Notice the straight fatigue crack that initiated from the weld root and extended through the weld metal. 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 Failure of double fillet welded joint between vane and back plate disclosing lamellar tearing. More
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Published: 01 December 1992
Fig. 2 Fracture surface through weld joint. 3×. More
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Published: 01 December 1992
Fig. 3 Fracture opposite weld joint. 3×. More
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Published: 01 December 1992
Fig. 4 Fracture surface of weld joint. 10×. More