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weld pool

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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
...Abstract Abstract An unacceptable degree of porosity was identified in several closure welds on stainless steel containers for plutonium-bearing materials. The pores developed in the weld tie-in region due to gas trapped by the weld pool during the closure process. This paper describes...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001682
EISBN: 978-1-62708-229-7
... by liquation in the HAZ of the autogenous GTAW seam weld, and are defined as HAZ liquation cracks [ 1 ]. The grain morphology in the weld fusion zone was typical of a procedure utilizing a “high” welding speed and producing a teardrop-shaped weld pool [ 2 ], Figure 6 . Large grains grew epitaxially from...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001152
EISBN: 978-1-62708-234-1
...Abstract Abstract Thermal and transformation stresses, resulting from welding, adding up with operational stresses can result in failure. Examples involving the crankshaft of a shaft-drive to produce artificial waves in a swimming pool, the joint bar of a dredger cast out of a running non...
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
...Abstract Abstract This article briefly reviews the general causes of weldment failures, which may arise from rejection after inspection or failure to pass mechanical testing as well as loss of function in service. It focuses on the general discontinuities observed in welds, and shows how some...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001314
EISBN: 978-1-62708-215-0
... in the material itself If sufficient fluid is present to maintain the annular flow, pooling of liquid in the bottom of the coils near the exit of the tank is expected to occur. This pooling results in one and possibly two conditions in these coils which leads to the development of thermal stresses: Pooling...
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
... of weld pool. Transgranular cracks were observed in the WM and were perpendicular to the welding direction ( Fig. 5a ). Transgranular cracking was primarily along the dendrites whereas the branches of cracks were found initiating from the dendrite arms as seen in Fig. 5(a) . Figure 5(b) shows...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001710
EISBN: 978-1-62708-229-7
... References 1. Howell J.P. , “Durability of Aluminum-Clad Spent Nuclear Fuels in Wet Basin Storage,” NACE Corrosion/96 , paper 128, Houston, Texas ( 1966 ). 2. Howell J.P. , “Corrosion Surveillance in Spent Fuel Storage Pools,” NACE Corrosion/97 , paper 107, Houston, Texas...
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
... not have been rectified by subsequent re-machining. It is well known that the application of welding to comparatively massive parts, such as these crankshafts, gives rise to severe residual stresses in the region of the weld, especially when the weld deposit is small. After solidification, the pool...
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 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...
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
... J.M. , and Effinger T.N. , “Microbiologically Influenced Corrosion Investigations in Electric Power Generating Stations” , NACE Corrosion/88 , Paper 83, 1989 5. Poole A. B. , “Trending of the Extent of Damage to Stainless Steel Pipe Welds Affected by Microbiologically Induced...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001171
EISBN: 978-1-62708-219-8
..., are an evidence of it ( Fig. 1 ). Fig. 1 Transverse welding seam (internal side). 0.4 × The pipe specimen shown in Figs. 2 and 1 was cut from a pipeline system for the feed of a swimming pool with sea water. The pipeline was in intermittent service for about two years when a failure...
Book Chapter

Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003548
EISBN: 978-1-62708-180-1
... the resistance of the current path in the solution and the external circuit. Thus, if dissimilar pipes are butt welded with the electrolyte flowing through them, the most severe corrosion will occur adjacent to the weld on the anodic member. Effect of Shape The geometry of the circuit elements determines...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006783
EISBN: 978-1-62708-295-2
... and the anode surfaces affects the resistance of the current path in the solution and the external circuit. Thus, if dissimilar pipes are butt welded with the electrolyte flowing through them, the most severe corrosion will occur immediately adjacent to the weld on the anodic member. Effect of Shape...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001695
EISBN: 978-1-62708-229-7
... been no new initiation of pitting observed since 1993. This paper describes the corrosion of spent fuel and the metallographic examination of Mark 31A target slugs removed from the K-basin storage pool after 5 years of storage. It discusses the SRS Corrosion Surveillance Program and the improvements...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001561
EISBN: 978-1-62708-229-7
.... This suggests that the inside surface condition (after welding) of a stainless steel pipe, or the corrosion films developed during exposure to the fuel pool coolant, may have an influence on the initiation of IGSCC. The most significant result obtained during this series of tests is the partially...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003552
EISBN: 978-1-62708-180-1
... hydrogen, tensile stress, and low-ductility microstructure, such as martensite. Hydrogen can be transferred to the molten weld pool from the arc atmosphere. Sources of hydrogen include the shielding gas, flux, or surface contamination. As the weld metal cools, it becomes supersaturated with hydrogen, which...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006784
EISBN: 978-1-62708-295-2
..., thorium, and their alloys. The presence of hydrides in these metals can cause significant increases in laboratory-measured strength and large losses in ductility and toughness. As in other types of alloys, excess hydrogen is readily picked up during melting or welding, and hydride formation takes place...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001814
EISBN: 978-1-62708-241-9
... Estimate of the Wall Stress at Operating Pressures during Temperature Excursions References References 1. Shoemaker L.E. , Smith G.D. , Baker B.A. , Poole J.M. : Fabricating nickel alloys to avoid stress relaxation cracking . In: NACE Corrosion 2007 Conference and Expo...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001812
EISBN: 978-1-62708-241-9
.... In this case, the proximity of the weld to the flange (where bolting stresses were high) is an additional factor favouring crack initiation at the weld. Geometric factors may have also led to mercury ‘pooling’ around this location. Cracking was more extensive for this failure compared with previous...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001816
EISBN: 978-1-62708-180-1
... ever causing failure. Figure 2 shows a poorly made weld with incomplete fusion amounting to more than half the tube wall thickness, yet this weld gave more than 27 years of service without failure. Nevertheless, fabrication and repair procedures should be aimed at producing defect-free systems...