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Fabrication defects

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001013
EISBN: 978-1-62708-234-1
... carbon dioxide dissolved in water condensed from the gas stream, with organic acids possibly an aggravating factor. A gas analysis showed no other corrosive agents. No metallurgical or fabrication defects were found in the carbon steel part. The mode of attack was corrosion-erosion, caused...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001151
EISBN: 978-1-62708-219-8
... and truss materials, and mechanical testing of the truss material. It was concluded that substandard structural components in combination with faulty construction was responsible for this service failure. Angle iron Fabrication defects Roofing Trusses Structural steel (Other, miscellaneous...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c0047432
EISBN: 978-1-62708-224-2
... penetration defect at the root of the fabrication weld. As a result of this failure, steps were taken to ensure that good welding practice (back-gouging) would be followed in the future fabrication of these links. Penetration Stress concentration Weld defects Low-alloy steel Fatigue fracture...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0046870
EISBN: 978-1-62708-217-4
..., probably water in the hydraulic oil, had been present in service. No material or fabrication defects were detected, nor was there any other service damage that could be related to the failure. Chemical analysis showed that the steel conformed in composition to the requirements of the specified material...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001491
EISBN: 978-1-62708-217-4
... is the source of fabric for Lot A9-057. The convergent throat sections of nozzles from S/N 014R and S/N 018 were made from Lot A9-057 and were the only insulation to show significantly inferior bias strength properties. While it is as yet a mystery as to the cause of fiber/fabric defectiveness, it remains...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001906
EISBN: 978-1-62708-217-4
... defects 4340 UNS G43400 Metalworking related failures Introduction Component: MS3314 general purpose bomb suspension lug Manufacturing defects: Forging laps and seams Background Two MS3314 suspension lugs fabricated from AISI 4340 steel are threaded into each 500- and 1000-lb general...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001520
EISBN: 978-1-62708-235-8
... Abstract Two types of chromium-plated hydraulic cylinders failed by cracking on their outer surfaces. In one case, the parts had a history of cracking in the nominally unstressed, as-fabricated condition. In another, cracks were detected after the cylinders were subjected to a pressure impulse...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001517
EISBN: 978-1-62708-217-4
... Abstract The purpose of this investigation was to determine the cause of the ultrasonic signal attenuation noted during an inspection of a composite aircraft component. Although ultrasonics was able to identify the location of the defective areas, destructive analysis had to be utilized...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001779
EISBN: 978-1-62708-241-9
... mechanisms ( Fig. 3 ) [ 10 ]. These fabrication defects not only might be active zones for farther defects such as corrosion and erosion but also produce extra pressures on pump which might result in operational problems that could speed up cavitation phenomenon [ 9 ]. According to chemical analyses...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001905
EISBN: 978-1-62708-217-4
... Abstract A bomb retaining ring fabricated from type 302 stainless steel unwrapped during a practice flight, causing the bomb fins to deploy. The retaining ring was able to unwrap itself because it was thinner and softer than required. Hardness testing, metallography, and tensile testing...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c0047537
EISBN: 978-1-62708-228-0
... were fabricated using standard vertical down stove pipe-welding procedures with E7010 cellulosic electrodes. Investigation Examination of the radio-graphs indicated that the defects were located near the 6 o'clock region of the weld. This region of the weld was removed and sectioned...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001113
EISBN: 978-1-62708-214-3
... Cause Hydrogen-induced cracking in the HAZ, coupled with hydrogen-aided underbead cracking and toe-weld cracking during truss fabrication, produced the damage. Remedial Action Because none of the tests indicated that defective material was involved and because the cracks were produced during...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006838
EISBN: 978-1-62708-329-4
... and Fabrication Sources of Failure” in this article. Consideration of AM constraints during both embodiment design and detail design is an important mitigation strategy, because some “defects” inherent to AM processes can be effectively healed by HIP, as previously noted. Another approach is in situ monitoring...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001793
EISBN: 978-1-62708-241-9
... selection and performance. Even though the quality of the welds was low, relating to its fabrication procedures, it is inherently difficult to provide a welded joint without such defects, as the parts broadly dissimilar in sizes were used (diameters of 105 mm for the pipe and 6 mm for the wire spacer...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003512
EISBN: 978-1-62708-180-1
... Abstract This article provides an overview of the structural design process and discusses the life-limiting factors, including material defects, fabrication practices, and stress. It details the role of a failure investigator in performing nondestructive inspection. The article provides...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c9001690
EISBN: 978-1-62708-226-6
... assisted fracture. Additionally, some components were found to contain fabrication/processing defects that contributed to premature failure. The implant of nonbiocompatible materials results in immeasurable damage to patients as well as losses for the public investment. It is proposed that local sanitary...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006836
EISBN: 978-1-62708-329-4
... failures are also discussed. In addition, the article discusses common causes of failures and presents examples of specific spring failures, describes fatigue failures that resulted from these types of material defects, and demonstrates how improper fabrication can result in premature fatigue failure...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001068
EISBN: 978-1-62708-214-3
... and two dished ends. Before the second dished end was attached, the tank surfaces were cleaned and passivated. Fig. 1 Diagram of tank. Dimensions are in millimeters. After fabrication, gamma radiography and dye penetrant testing revealed no defects in any of the tanks. Following hydrostatic...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001744
EISBN: 978-1-62708-217-4
... formed during the fabrication of the axle mounting plate. So-called all-purpose electrodes were used. Thus, the main cause for failure was a manufacturing deficiency-fatigue failure developed because of improper welding during fabrication of the axle. The proper electrode should have been used...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001289
EISBN: 978-1-62708-215-0
... was attributed to hydrogen embrittlement. Measurement of hydrogen content in the raw material prior to fabrication was recommended. Careful control of acid pickling procedures for descaling of the hot-rolled bars was also deemed necessary. Inclusions Subsurface cracks 38KhA Hydrogen damage...