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weld bead size

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Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001837
EISBN: 978-1-62708-241-9
.... Although no cracks were found when the welds were visually inspected, X-ray radiography showed small discontinuous surface cracks adjacent to the weld bead in the heat affected zone. Further investigation, including optical microscopy, microhardness testing, and residual stress measurements, revealed...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001770
EISBN: 978-1-62708-241-9
.... The cracks were subsequently welded over with 308 stainless steel filler wire and the base plate was replaced with new material. Soon after, the tank began leaking along the weld bead, triggering a full-scale investigation; spectroscopy, optical and scanning electron microscopy, fractography, SEM-EDS...
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
... geometry (included angle or root opening too small) Improper backgouging (narrow or shallow) Unbalanced heat input To prevent cracking in multiple-pass groove or fillet welds: Increase bead size of the first pass by using lower travel speed, a short arc, and an uphill (∼5°) welding mode...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001049
EISBN: 978-1-62708-214-3
... and/or brittle grain-boundary phases (such as the niobium carbides), hot cracking generally appears as interdendritic fissures. Both mechanical and metallurgical factors cause hot cracking. Mechanical factors include the size and shape of the weld bead. Niobium is generally considered to be a potent contributor...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001206
EISBN: 978-1-62708-235-8
...Abstract Abstract A number of seamless pipe nipples of 70 mm diam and 3.5 mm wall thickness made of steel type 35.8 were oxyacetylene welded to collectors of greater wall thickness with a round bead. X-ray examination showed crack initiation in the interior of the nipples close to the root...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001669
EISBN: 978-1-62708-229-7
... there was subsurface cracking. Analysis of samples 11, 12 and 13 removed near the failure site established that the leak was the result of advanced stress-rupture cracking in the weld metal. Figure 3 shows the macrostructure of the three-bead width of the longitudinal seam weld as contained in boat sample 12...
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
... and incorporated into the weld bead at weld closure. The gas is trapped in the molten weld pool and becomes the spherical pore observed in the weld tie-in region. A predictive model was developed to correlate the container chamfer and axial gap to pore size. This model predicts that the pore size is related...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.pulp.c0047529
EISBN: 978-1-62708-230-3
... to the outside of the head completed the groove for the circumferential attachment weld. Investigation (visual inspection and actual size views etched in hot 50% hydrochloric acid) supported the conclusion that cracking occurred in the HAZ in the head of the original design, originating in the sharp corner...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001176
EISBN: 978-1-62708-229-7
...; this is also true for the bordering regions of the pipe material. This weld was probably placed in two passes and the grain size of the inner layer was changed during the deposition of the second bead. Fig. 9 Specimen 2, longitudinal section, etch: picral. Overall view. 2 × Fig. 10 Specimen 2...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001208
EISBN: 978-1-62708-229-7
... of the rod directly next to the weld bead. Investigation showed that the fracture of the superheated steam push rod spindle was caused by hardening and hardening crack formation in the weld seams and adjoining areas. It would have been preferable to avoid welding near the cross sectional transitions...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001276
EISBN: 978-1-62708-215-0
... through the piping, extremely turbulent flow, and/or intrusions (weld backing rings or weld bead protrusions) on the internal surface of the pipes. Increasing the pipe diameter and decreasing the intrusions on the internal surface would help to eliminate the problem. Diameters Leakage Mechanical...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.rail.c0048087
EISBN: 978-1-62708-231-0
... the electrode adjacent to the weld. A relatively broad HAZ containing tempered and untempered martensite was present at each of the weld beads because of multiple-pass welding. The rail and beam both exhibited normal as-rolled steel structures with no irregularities. Chemical analysis revealed the rail...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001820
EISBN: 978-1-62708-180-1
.... Investigation of this general category of failures is similar; therefore, only selected examples of these failure causes will be described. Another type of defect in double-submerged arc welds results from lack of penetration, in which the inside and outside beads are too shallow and do not overlap...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001323
EISBN: 978-1-62708-215-0
... received for analysis. These tube samples were labelled 1T and 4T. Visual Examination of General Physical Features U-bend T2 was a replacement bend made out of two 90° elbows. U-bends T3 and T4 were original to the boiler. U-bend T3 contained a patch weld over a past failure. Both tubes 1T and 4T...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001358
EISBN: 978-1-62708-215-0
... stress-relief temperatures. The same welding parameters (heat input, electrode size, etc.) were used for each experimental weld. Table 1 shows average microhardness results for the weld metal, HAZ, and base metal of the experimental welds and the actual welds. The results indicate that the welding...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001580
EISBN: 978-1-62708-229-7
... . The volume of the globule is approximately 51.9 mm 3 . These volumes are referenced to the can OD surface. Since the weld bead is typically concave due to the can/plug gap, the hole is actually smaller and the globule larger than these volumes indicate. During the mapping process, it is not possible...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001088
EISBN: 978-1-62708-214-3
... fracture as 139.07 mm (5.475 in.) from one end. The fracture origin was flat and dull, with the final propagating fracture surface being shiny. Additionally, the toe of the SMA tack weld bead was present at the origin ( Fig. 2 and 3 ). No thread damage was present. The fracture surface from specimen B...
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
..., 170 MPa, and 30%. The part analyzed was sectioned in the area where the localized cracks originated ( Figure 4 ). Figure 5 shows the general appearance of the defects. Note that the repair weld bead seen in Figure 2 was applied without all the defects having been removed by grinding...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001667
EISBN: 978-1-62708-235-8
... cylinders. This led to the concern that oxygen was introduced into the part during the welding procedure and caused alpha case formation of the surface of the titanium which could lead to detrimental part performance. Due to its size and value, a comprehensive on-site nondestructive microstructural analysis...
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
... automated ultrasonic inspection supplemented by remote visual inspection. The inspection system provided the following capabilities: Thickness mapping Weld inspection Crack detection Flaw sizing Through-wall bleed-out Visual/photography Inspection Equipment Ultrasonic System...