1-20 of 89 Search Results for

flaw detection

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
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c0059932
EISBN: 978-1-62708-236-5
...Abstract Abstract Field failures, traced to internal cracks that were initiated from gross nonmetallics, were encountered in the upset portion of forged 4118 steel shafts. Ultrasonic inspection was thought to be the best method for detection from the location of these cracks, their orientation...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001079
EISBN: 978-1-62708-214-3
...Abstract Abstract Numerous flaws were detected in a steam turbine rotor during a scheduled inspection and maintenance outage. A fracture-mechanics-based analysis of the flaws showed that the rotor could not be safely returned to service. Material, samples from the bore were analyzed to evaluate...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001639
EISBN: 978-1-62708-229-7
... automated ultrasonic inspection supplemented by remote visual inspection. The inspection system provided the following capabilities: Thickness mapping Weld inspection Crack detection Flaw sizing Through-wall bleed-out Visual/photography Inspection Equipment Ultrasonic System...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006758
EISBN: 978-1-62708-295-2
... removing the part from an assembly or a structure to document the pristine damage condition of the part before any destructive testing begins, ideally prior to removal or re-location of the part. Visual inspection can include optical magnifiers and light sources to aid in the detection of surface flaws...
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
... or material Can detect flaws up to 6.3 mm (¼ in.) below surface under good conditions Iron and steel, nickel, cobalt Ultrasonic testing (UT) High-frequency vibrations are introduced into sample. Waves are reflected or scattered by discontinuities. In many cases, UT may be used to detect, size, and image...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001050
EISBN: 978-1-62708-214-3
... with the product, and it was well maintained. Testing Procedure and Results Nondestructive Evaluation Ultrasonic Examination Within days of the failure, sections of the ruptured Yankee dryer were examined using ultrasonic flaw detection methods. The examination focused on the edges of the shell...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001594
EISBN: 978-1-62708-229-7
... of Flaw Detection Response to Cracks Identifying At-Risk Joints Repair Strategies and Methods Conclusions References References 1. EPRI Report TR-107455, Electric Power Research Institute. 2. Benac D.J. and Chell G.G. : SwRI Report No. 06-5229-166, Southwest Research...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003515
EISBN: 978-1-62708-180-1
.... A developer is applied to draw the penetrant out of the flaw, giving a visible indication. Used on metal, glass, and ceramics to locate surface-connected discontinuities. Relatively easy to use and does not require elaborate equipment Cannot detect discontinuities that do not break the surface of a test...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c9001137
EISBN: 978-1-62708-228-0
... yielded realistic critical flaw sizes (in the range 51 to 150 mm). These sizes were consistent with the limited fracture surface observations and such flaws could well have been present in the vessel dome prior to catastrophic failure. For similar pressure vessels, an inspection program based on a leak...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001368
EISBN: 978-1-62708-215-0
... pieces were ultrasonically inspected with a longitudinal-wave 2.25 MHz search unit from the diameters. The hub section was also inspected from the stub shaft end. Although the ultrasonic flaw detector was set to detect a 3 mm (0.1 in.) equivalent diameter flat-bottom hole, no flaws were detected...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001515
EISBN: 978-1-62708-229-7
... the likelihood of pressure tube rupture when a crack is detected. All pressure tube off-cuts were examined for lamination flaws by ultrasonics and metallography. In-reactor, non-destruetive inspections of pressure tubes from the top of ingots which contained deep shrinkage pipes were made, to ensure...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.rail.c9001659
EISBN: 978-1-62708-231-0
... conditions under which a shell turns into a detail crack. Figure 2 presents the complete section of a rail identified as rail 5 containing a detail fracture. The two halves of the fracture surface were identified as 5–17 and 5-1. The flaw was detected in service, at which time the rail was removed...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001820
EISBN: 978-1-62708-180-1
... of fracture mechanics to estimate the failure pressure of the corrosion flaw to verify that the failure resulted from the observed corrosion defect. This is also helpful in evaluating corrosion-defect severity when corrosion is detected on an operating pipeline. An example of a corrosion flaw in 610...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001845
EISBN: 978-1-62708-241-9
... led an investigation that included fractographic and microstructural analysis, hardness testing, inductively coupled plasma spectroscopy, and finite-element analysis. The fracture was shown to be brittle in nature and covered with oxide flakes, but no other flaws relevant to the failure were observed...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003524
EISBN: 978-1-62708-180-1
... under ultraviolet light. This method reveals surface cracks that are not visible to the naked eye. Liquid-Penetrant Inspection Liquid-penetrant inspection is used to detect surface flaws in materials. It is used mainly, but not exclusively, with nonmagnetic materials, on which magnetic-particle...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003507
EISBN: 978-1-62708-180-1
... produce a notch of unknown severity that acts as a stress raiser, which may adversely affect strength under load. Subsurface and core discontinuities may also occur. Subsurface flaws often (but not always) originate from the as-cast ingot due to shrinkage, voids, and porosity that form during...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001708
EISBN: 978-1-62708-217-4
... to two potential contributors to the propeller blade failure, viz., the presence of casting flaws at the low pressure side of the propeller blade and service stresses at this surface that reached approximately 400 MPa. This stress value exceeded the yield strength at the corresponding location...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001126
EISBN: 978-1-62708-214-3
... was attributed to growth of the inclusions, coupled with high residual stresses. Fracture mechanics analysis showed that the residual stresses alone were high enough to cause fracture of the glass, with a flaw of the size observed. Facades Sheet glass Stress cracking Tempered glass Brittle fracture...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001706
EISBN: 978-1-62708-217-4
... and reached the critical crack size. Apparently, the pit had been missed during optical inspection. Difficulties are encountered in inspecting and finding microscopic flaws and pitting on the inner painted surfaces. Emphasis should be placed on adequate surface finishing and inspection of the machined...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001030
EISBN: 978-1-62708-214-3
..., brittle (untempered) martensite was detected in two holes, one as described previously and another with a diameter of 12.7 mm (0.500 in.), which was without interference-fit fastener requirements and had no cracks. A 0.05 mm (0.002 in.)thick brittle layer in the 12.7 mm (0.500 in.) diam hole is shown...