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weldment integrity

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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
... imperfections may be tolerable and how the other may be root-cause defects in service failures. The article explains the effects of joint design on weldment integrity. It outlines the origins of failure associated with the inherent discontinuity of welds and the imperfections that might be introduced from arc...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c9001514
EISBN: 978-1-62708-218-1
... out more frequently in high stress areas that are critical to the integrity of the welded assembly. The floor sill-rocker panel flange weldment is not such a region. These defective welds are inconsequential in the ordinary use of the automobile. However, once the accident occurred the defect had...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001611
EISBN: 978-1-62708-219-8
... Abstract Cold cracking of structural steel weldments is a well-documented failure mechanism, and extensive work has been done to recognize welding and materials selection parameters associated with it. These efforts, however, have not fully eliminated the occurrence of such failures...
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
... the microstructural information needed to evaluate the integrity of the titanium weldment in question. No expensive dedicated field metallography equipment (such as a portable microscope or electrolytic polisher) was needed. No evidence was found to suggest that a significant amount of oxygen had diffused...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001328
EISBN: 978-1-62708-215-0
... cracks showed intergranular cracks originating at weld toes and filled with oxidation product, which precluded determination of the cracking mechanism. All weldments exhibited high degrees of secondary precipitates, with original fabrication welds exhibiting higher apparent levels than repair welds. SEM...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001909
EISBN: 978-1-62708-235-8
... was focused on the integrity of the plug welds. ARL performed radiography, tensile testing, visual examination, and metallography of the failed test specimens in order to characterize the weldments. Radiographic examination did not reveal significant nonconformities within the welds. Initial peel tests...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001129
EISBN: 978-1-62708-214-3
... occurred previously. A recent inspection failed to disclose any defects prior to the failure. A 45 Mg (50 ton) rail crane bolster made from 0.25C-1.24Mn-0.62Cr-0.24Mo cast steel failed. Because neither a blueprint nor detailed specifications were furnished, comments on the integrity of the design...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001264
EISBN: 978-1-62708-215-0
... Microstructure of one of the semilenticular areas in Fig. 4 , clearly showing it to be a weldment. 61×. Fig. 6 Microstructure of material away from the repair welds. 122×. Fig. 7 Microstructure of material adjacent to the weld and at the fracture surface shown in Fig. 4 . 122...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001141
EISBN: 978-1-62708-227-3
... and bulkhead weldments. In some cases these tears may propagate through the hull thickness and become a nuisance by causing a minor leak. However, the metallographical results in this report and 20 years successful service suggest that this is not a major problem which would affect the hull integrity...
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
... counterbore and weldment (pipe approximately 0.33″ thick) Fig. 4 Photomicrograph of crack after ASTM A-262 Practice A was performed Examination of the base material outside of the heat-affected zone after the ASTM A262 Practice A test revealed virtually no evidence of material sensitization...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c0091362
EISBN: 978-1-62708-220-4
...% oxalic acid. 100× The evidence indicated weldment contamination; therefore, effort was directed at finding the levels of carbon, nitrogen, and oxygen in the various components present before and after welding. The averaged results were as follows: Content Component, ppm C N C + N O...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006808
EISBN: 978-1-62708-329-4
... that the weld discontinuities evaluated through NDE in weld production are not considered a weld failure, but they may contribute to developing into one while in service. Methods of Nondestructive Inspection of Welds The nondestructive inspection of weldments has two functions: Quality control...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003556
EISBN: 978-1-62708-180-1
... inhibitors degradation environmentally assisted cracking failure analysis heat exchangers inspection iron lubricants microbially induced corrosion piping sampling steel tanks MICROORGANISMS can directly or indirectly affect the integrity of many materials used in industrial systems. Most...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006814
EISBN: 978-1-62708-329-4
... engineered systems. Other examples involve weldments, that is, an assembly joined by welding ( Ref 2 ). A structure that has welded connections could be called a weldment, although this is not typical; structures are normally one-of-a-kind products, designed by civil or structural engineers, and expected...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006822
EISBN: 978-1-62708-329-4
... Abstract This article discusses the failure analysis of several steel transmission pipeline failures, describes the causes and characteristics of specific pipeline failure modes, and introduces pipeline failure prevention and integrity management practices and methodologies. In addition...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001041
EISBN: 978-1-62708-214-3
... an integral part of the truck frame, transmitting torsional and bending loads from the suspension torque rods to the truck side rails. Two truck cross members fabricated from SAE 950X plate, comprising a formed channel section and an internal fillet-welded diaphragm, had failed on prototype vehicles...
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
... Methods Properties that control the integrity and useful life of blades deteriorate with time in service, and it is imperative that the condition of blades is assessed periodically. The “remaining life” is also estimated to determine what actions, if any, need to be taken to ensure continued safe...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006812
EISBN: 978-1-62708-329-4
...) mechanical integrity requirements and American Petroleum Institute (API) inspection requirements. A knowledge base of equipment failures is also a useful input into a plant mechanical integrity program, with the aim of continual reliability improvement. Objectives of a Failure Analysis The objectives...
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
... outlet temperature of 566 deg C, the 11.4 cm thick header had operated for approximately 187,000 h at the time of the failure. Discussion focuses on the results of a metallographic examination of boat samples removed from the longitudinal seam weldment in the vicinity of the failure and at other areas...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003520
EISBN: 978-1-62708-180-1
... corrosion products, deposits, or coatings. Determine mechanical properties and compare with specifications or standards. Perform macroscopic examination to evaluate homogeneity, integrity, and quality. Perform metallographic examination to evaluate microstructural features. Determine...