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radiography

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Published: 01 June 2019
Fig. 2 X-ray radiography film of J-2 joint. The picture shows several pits (black circle) around the welding protrusion (one white band among two dark bands) More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0060144
EISBN: 978-1-62708-234-1
... was instigated as a result of the failure. It was concluded after laboratory radiography and macroexamination that if the fissure were large enough to show on a radiograph, either with or without the catalyst, the tube could be expected to fail within one year. The set up for in-service radiograph examination...
Image
Published: 01 June 2019
of a section removed from a failed tube that contained no catalyst showing fissures near the ruptured area. (c) Same section as (b) but containing a catalyst. Fissures are visible but less apparent. (d) Macrograph showing fissures in a tube that were detected by radiography. 6├Ś. (e) Macrograph showing fine More
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
... radiography surface discontinuities surface inspection ultrasonic inspection NONDESTRUCTIVE TESTING (NDT), also known as nondestructive evaluation (NDE), includes various techniques to characterize materials without damage. The methods of NDE involve dimensional metrology, visual examination...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c9001463
EISBN: 978-1-62708-224-2
... of this magnitude could be revealed by radiography or ultrasonics but it would be difficult to detect the presence of cracks in course of development from the defects. It would be more prudent to ensure that welded links of this type were free from internal cavities before being put into service. Chains...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001074
EISBN: 978-1-62708-214-3
... for sequential polishing and metallographic observations to determine the size of the cavities. Four randomly selected numbers of unmachined castings obtained from the same supplier were used for radiography to assess the location of shrinkage cavities. Cut portions containing the defect locations from...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0048299
EISBN: 978-1-62708-229-7
... cause of failure was concluded to be exfoliation of the scale from the ID surface of the tube. Creep failures were interpreted to be caused by localized temperatures higher than the maximum service temperature. Replacement of the affected tubes was recommended. Inspection of the tubes by radiography...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001446
EISBN: 978-1-62708-234-1
..., about 2 in. long, developed at the approximate mid-length of the vessel, and allowed slow de-pressurization. Subsequent examination by radiography and ultrasonic means indicated the crack was associated with an irregularly shaped, laminar type of defect located within the wall of the vessel...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c0091384
EISBN: 978-1-62708-219-8
... perforations and cracking along its axis. The perforations and the crack were at the 6 o'clock position. Investigation (visual inspection, radiography, unetched macrographs, and tensile testing) supported the conclusion that the failure occurred as result of years of exposure to ground water in the soil...
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
... and measured 1.5 m (58 in.) in diameter and 8.5 m (28 ft) in length. Investigation (visual inspection, chemical analysis, radiography, dye-penetrant inspection, and hydrostatic testing of all E-Brite welds, 4x images, 100x/200x images electrolytically etched with 10% oxalic acid, and V-notch Charpy testing...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c9001543
EISBN: 978-1-62708-218-1
... by visual inspection, hardness traverses, radiography, dye penetrant inspection, chemical analysis, macrometallography, optical microscopy, and electron microscopy. The crown of one piston had a rough, crumbly deposit, which was detachable with a knife. Two pistons had remains of carbonaceous deposits...
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
... after a circumferential welding process. The nozzle assembly was made from low-carbon CrMoV alloy steel that was subsequently single-pass butt welded using gas tungsten arc welding. Although no cracks were found when the welds were visually inspected, X-ray radiography showed small discontinuous surface...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001326
EISBN: 978-1-62708-215-0
... Abstract Pressure testing of a batch of AISI type 316L stainless steel thermowells intended for use in a nuclear power-plant resulted in the identification of leakage at the tips in 20% of the parts. Radiography at the tip region of representative thermowells showed linear indications along...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001714
EISBN: 978-1-62708-232-7
... of a carburising processes. Metal dusting attacks the inner surface of HyL III radiation heat exchanger pipes in generating crater-like pits. Thickness of the pipes is generally reduced very much, very quickly. X-ray radiography can be used to identify the pits by showing black spots in the film. In order...
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.c0089563
EISBN: 978-1-62708-217-4
... reveals internal voids, such as gas porosity or shrinkage porosity, but does not detect a crack or a cold shut, unless the plane of the imperfection is nearly parallel to the x-ray beam and unless there is a finite opening; a cold shut that has its faces in contact is rarely revealed by radiography...
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
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0047856
EISBN: 978-1-62708-217-4
... vendors were notified about the excess size of the nonmetallic inclusions in the master connecting rods and a nondestructive-testing procedure for detection of large nonmetallic inclusions was established. Inspection Magnetic particle testing Radiography Stress concentration AMS 6412 4337 UNS...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001339
EISBN: 978-1-62708-215-0
... of aluminum when the mercury-contaminated surface is first exposed to moist, ambient air. The aluminum turns a gray color, and a voluminous white gamma alumina is observed growing from the freshly exposed aluminum surface. Testing Procedure and Results Radiography Radiographic examination...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0048801
EISBN: 978-1-62708-229-7
... corrosion products covering early-fracture region and freshly exposed fracture surface of weld metal. The sample containing the circumferential weld was examined using radiography and was found to be acceptable. Radiography of the samples containing the longitudinal seam weld detected only one sample...