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Weld flaws

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001161
EISBN: 978-1-62708-220-4
... fissure in one of the welded seams, which according to microscopic examination, originated in the base material of the container. Higher magnification revealed a narrow zone adjacent to the weld seam permeated with intergranular cracks, the result of hydrogen attack. It also showed the structure to be...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c0048795
EISBN: 978-1-62708-220-4
... during heating. After completion of each seam weld, the weld preheat should be continued for a short distance along the seam. The critical flaw size for this alloy and section thickness should be determined by fracture mechanics, and the capacity of available nondestructive testing methods for detecting...
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
... 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 and...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c9001142
EISBN: 978-1-62708-228-0
... part. The central part of the fracture was about 20 mm wide at the maximum value, being extruded about 25 mm high. Dividing the LPG cylinder into two parts along the central welding line and observing the internal surface, many flaws about 40–45 em long were found in the longitudinal direction as shown...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001544
EISBN: 978-1-62708-219-8
... Abstract A large crack developed at a girder-truss joint area of the Fremont bridge in Portland, OR, on 28 Oct 1971. It occurred during a positioning procedure involving a junction piece welded to a girder, starting as a brittle fracture and terminating in plastic hinges in the girder web welds...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001683
EISBN: 978-1-62708-234-1
... 1 . Weld appearance at the tubercle site was acceptable. There were no obvious crevices, no lack of fusion, and no crater pull-off flaws at the point of MIC attack. There was no heat discoloration in the vicinity of the tubercle, but there was a small dark deposit similar to “sugaring” evident at...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001079
EISBN: 978-1-62708-214-3
... level. A ring sample removed from a sound location was used to perform several mechanical property tests, including tensile, Charpy V-notch impact, and fracture toughness. Because of the limited sample size, standard specimens were fabricated by electron beam welding similar material attachments...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001515
EISBN: 978-1-62708-229-7
.... The forging and extrusion processes will partially weld up pipe cavities, forming a lamination. Nondestructive examination techniques for pressure tubes are not able to detect these tight, shallow-angle flaws. The lamination flaw probably opened in the following sequence. The lamination intersected...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001327
EISBN: 978-1-62708-215-0
... Abstract Three ASME SA106 grade B carbon steel feed water piping reducers from a pressurized water reactor showed indications of flaws near welds during ultrasonic testing. Further examination and testing indicated that the cracks resulted from a low-cycle corrosion fatigue phenomenon...
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
... criteria related to an examination. As such, the engineering community now tends to make specific distinctions between the terms discontinuity and defect (or flaw). Neither construction materials nor engineered structures are free from imperfections, and welds and weld repairs are not exceptions. All...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c9001137
EISBN: 978-1-62708-228-0
... ). 2. British Standard PD 6493:1980 “Guidance on some methods for the derivation of acceptance levels for defects in fusion welded joints” . 3. Holland M. L. , Ball M. F. , Tait R. B. and Garrett G. G. “A fracture mechanics assessment of an-unusual carbon steel used in...
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
... rotating components have a tendency to vibrate more as they age. Risk to the joint cannot be determined by simply measuring the frequency and amplitude (displacement) of the vibration. A determination of the stress intensity at the flaw in the socket-welded fitting is also needed. Details describing how...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001661
EISBN: 978-1-62708-229-7
... Abstract An evaluation of indications in the main turbine building column horizontal plate welds was conducted by the joint efforts of field metallography and nondestructive examinations. The turbine building main column horizontal plate welds were selected at random and were inspected to find...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001111
EISBN: 978-1-62708-214-3
... Abstract A catastrophic brittle fracture occurred in a welded steel (ASTM A517 grade H) trapezoidal cross-section box girder while the concrete deck of a large bridge was being poured. The failure occurred across the full width of a 57 mm (2 1 4 in.) thick, 760 mm (30 in.) wide flange...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001639
EISBN: 978-1-62708-229-7
... surrounded by reinforced concrete. The concrete, except for the tank top, is surrounded by dirt so that the tank is essentially a buried structure. The early type I and II tanks experience nitrate-induced stress-corrosion cracking (SCC). The cracks are associated with fabrication welds and are driven by the...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001136
EISBN: 978-1-62708-229-7
... the problem of slow, high cycle fatigue crack growth, at normal operating stresses in similar fans. Bending fatigue Centrifugal blowers Electric power generation Weld defects Low-carbon steel Fatigue fracture Joining-related failures References 1. Parr C.A...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001845
EISBN: 978-1-62708-241-9
... , 501 – 510 ( 2013 ) 10.1016/j.engfailanal.2013.07.003 5. Zhang M. , Chu Q. , Li J. et al. , Failure analysis of a welded impeller in coke oven gas environment . Eng. Fail. Anal . 38 , 16 – 24 ( 2014 ) 10.1016/j.engfailanal.2013.12.003 6. Patterson E.A...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001803
EISBN: 978-1-62708-241-9
... , 1999 , 20 , pp. 765 – 772 10.1016/S0142-9612(98)00229-4 . 25. Reclaru L. et al. : “ Corrosion Behaviour of a Welded Stainless-Steel Orthopedic Implant ,” Biomaterials , 2001 , 22 , pp. 269 – 279 10.1016/S0142-9612(00)00185-X . 26. Walczak J. , Shahgaldi F...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001708
EISBN: 978-1-62708-217-4
... Cracks were primarily transgranular with respect to the microstructure ( Figure 2 ). These cracks appear to have followed a crystallographic path, through the grain, rather than along the grain boundaries. Some crack branching from these volumetric flaws was observed. Indications of weld repairs...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c0089339
EISBN: 978-1-62708-233-4
... Abstract Leakage was identified around a coupling welded into a stainless steel holding tank that stored condensate water with low impurity content. The tank and fitting were manufactured from type 304 stainless steel. The coupling joint consisted of an internal groove weld and an external...