1-20 of 21 Search Results for

weld bead morphology

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
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
... showing cracks adjacent to the weld bead Fig. 2 Location and morphology of cracks as revealed by dye penetrant testing The quality of the weld is partially governed by the quality of the weld metal (fusion zone) and HAZ. Major welding parameters that affect the quality of the weld are...
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
... 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 analysis...
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
... indications that are found by nondestructive testing methods. Surface features that are causes for rejection include: Excessive mismatch at the weld joint Excessive bead convexity and bead reinforcement Excessive bead concavity, underfill, and undersized welds Sharp undercut and overlap at the...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001321
EISBN: 978-1-62708-215-0
... welded support plates, gave rise of hot spots and areas of high heat flux, resulting in steam blanketing. The morphology of the corrosion damage confirmed that the boiler tubes failed as a result of steam blanketing that concentrated the phosphate salts resulting in alkaline attack. The powdery non...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001325
EISBN: 978-1-62708-215-0
... welded to the 3-in. pipe. The rupture is at the toe of the weld between the 3-in. pipe and the reduction socket (arrow) The arrow in Fig. 1 shows the location of the rupture at the toe of the weld joining the reduction socket to the 3-in. C-D run. The weld bead showed quite noticeable external...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006829
EISBN: 978-1-62708-295-2
... Abstract Fretting is a wear phenomenon that occurs between two mating surfaces; initially, it is adhesive in nature, and vibration or small-amplitude oscillation is an essential causative factor. Fretting generates wear debris, which oxidizes, leading to a corrosion-like morphology. This...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001821
EISBN: 978-1-62708-241-9
... steel ( Fig. 4 ). Analysis of the banding structure on several samples indicates that the plate rolling direction is circumferential around the tank. Also, it was found that several plates were welded together to form the cylindrical portion of the tank. The ferrite morphology was mixed blocky and...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001818
EISBN: 978-1-62708-180-1
... Abstract This article discusses the effect of using unsuitable alloys, metallurgical discontinuities, fabrication practices, and stress raisers on the failure of a pressure vessel. It provides information on pressure vessels made of composite materials and their welding practices. The article...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003553
EISBN: 978-1-62708-180-1
... bead geometry from deficiencies in welding Inclusions Interfaces in layer-type bonded materials (applied by cladding, rolling, electroplating, spraying, brazing, or soldering) Case-core interfaces in case-hardened steels Severe surface irregularities, such as rolling or forging laps, seams...
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
... 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, as is the common practical situation for such equipment. Fig. 4 Cutting plan of the piece analyzed...
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
... conservative; thus, even massive defects may be present in some areas without causing fracture to occur until after a considerable period of operation. Some imperfections may be present without ever causing failure. Figure 2 shows a poorly made weld with incomplete fusion amounting to more than half the tube...
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
... spaces should be used to completely isolate the fastener. (b) Weld filler metals should be more noble than base metals. Transition joints can be used when a galvanic couple is anticipated at the design stage, and weld beads should be properly oriented to minimize galvanic effects. (c) Local damage can...
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
... weld beads should be properly oriented to minimize galvanic effects. (c) Local damage can result from cuts across heavily worked areas. End grains should not be left exposed. (d) Galvanic corrosion is possible if a coated component is cut. When necessary, the cathodic component of a couple should be...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006791
EISBN: 978-1-62708-295-2
... by localized bonding. It occurs when high loads, temperatures, or pressures cause the asperities on two contacting metal surfaces in relative motion to deform and spot weld together, followed by plowing, tangential shearing, and tearing of the metal in small, discrete areas called microjoints ( Ref 3...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003517
EISBN: 978-1-62708-180-1
... stresses. For more details, see the section “Life Assessment Methods for Power Plant Piping and Tubing” in this article. Sigma phase sometimes is found in austenitic stainless steel weld metal as well as in gas turbine nickel-base superalloys. Although sigma phase can occur in the as-welded...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006764
EISBN: 978-1-62708-295-2
... neutrons passing through or reflecting from test object cast shadows or patterns on film or digital imaging plates Manufacturing, weld inspection, finding objects in closed containments, metrology of enclosed objects, thickness Hazardous radiation operation; not sensitive to discontinuities less than 1–2...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006788
EISBN: 978-1-62708-295-2
... been implicated in the corrosion of 304L stainless steel welds ( Ref 44 ). The pitting of stainless steel in natural waters has been linked to ennoblement of the metal surface by contact with MnO 2 in an overlying biofilm ( Ref 38 , 45 , 46 ). Where this approaches the pitting potential, it can...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003538
EISBN: 978-1-62708-180-1
... cleavage and MVC, and that fracture of the shear lip regions occurred by MVC. Close examination of the morphology of the dimples on the shear lip shows that they are elongated rather than being equiaxed, and that if dimples are present in the flat region, they can also be elongated or equiaxed. These cases...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006775
EISBN: 978-1-62708-295-2
... fracture area can occur by either or both cleavage and MVC, and that fracture of the shear lip regions occurred by MVC. Close examination of the morphology of the dimples on the shear lip shows that they are elongated rather than being equiaxed, and that if dimples are present in the flat region, they can...
Book Chapter

Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003562
EISBN: 978-1-62708-180-1