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temperature-induced fracture

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Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003554
EISBN: 978-1-62708-180-1
... of LMIE, the fracture is, of course, covered by a visible layer of the embrittler metal. At room temperature, mercury or its alloys are liquid, and other metals are present as a resolidified coating. Mercury-induced failures of aluminum alloys are characterized by the generation of significant quantities...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006786
EISBN: 978-1-62708-295-2
... at the head-to-shank fillet. (b) Intergranular fracture morphology. Failure was attributed to liquid-metal-induced embrittlement caused by excessive temperature exposure while under stress. Scanning electron microscope split screen. Original magnification: left, 105×; right, 1050× Acknowledgment...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0048616
EISBN: 978-1-62708-217-4
.... Mechanical stresses were induced by tightening of the clamp around the duct, which in effect acted to straighten the bolt. The action of these stresses on the carbides that precipitated in the grain boundaries resulted in fracture of the bolt. Due to the operating temperatures of the duct near the bolt...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001566
EISBN: 978-1-62708-229-7
... in the desuperheater assembly. A temperature fluctuation as low as 94° C (200° F) in the assembly, about the mean operating temperature of 480° C (900° F), could induce thermal strains in excess of the yield of the material. The beach markings on the fracture surface were attributed to crack propagation under...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001734
EISBN: 978-1-62708-234-1
...-induced fractures made at room and elevated temperatures with the bracket failure. The service failure exhibited grain separation and loss of delineation of the grain boundaries due to melting. SEM revealed deep voids between grains and tendrils that connected grains, which resulted from surface tension...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001802
EISBN: 978-1-62708-241-9
..., the stress-induced austenite to martensite phase transformation is suppressed. At 37 °C, the specimens are all just above the A f temperature, maximizing superelasticity. At −194 °C, the specimens were completely martensitic. As-drawn wire fracture surfaces were examined after torsional and fatigue...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001812
EISBN: 978-1-62708-241-9
..., fracture surfaces appear flat and largely featureless except for isolated tear ridges in some cases ( Fig. 4 ) and there are no obvious signs of slip around crack tips, consistent with an adsorption-induced decohesion process. However, dimples can be so small and shallow that they are not resolved...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c9001693
EISBN: 978-1-62708-228-0
... and down from the defect when the stress induced by filling reached a critical value for the steel, which had poor toughness properties. This steel had been used in the original construction of a tank in Ohio more than 40 years previously. The defect at which brittle fracture originated in the tank shell...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001758
EISBN: 978-1-62708-241-9
.../temperature combination for minimum stress-rupture life can exist almost anywhere on the airfoil depending on the blade design and internal cooling scheme. This gives rise to differences in creep rate radially along the airfoil with stress-rupture fracture normally occurring in a local region exhibiting...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001483
EISBN: 978-1-62708-225-9
... in between the bolt and the hole in the strip. The bolt end adjacent to the fracture had been subjected to intense local heating. The extent of the grain-growth indicating that the temperature had been in the region of 1200 deg C (2192 deg F). When the temperature reached the melting-point of copper, 1083...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003540
EISBN: 978-1-62708-180-1
... corrosion cracking steels INTERGRANULAR FRACTURE is the decohesion that may occur along a weakened grain boundary. Typically, the grain boundaries in polycrystalline materials are stronger than individual grains in a properly processed material below its creep-regime temperature. The grain boundaries...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006777
EISBN: 978-1-62708-295-2
... a case history on IG fracture of steam generator tubes, where a lowering of the operating temperature was proposed to reduce failures. dimpled intergranular fracture grain boundaries hydrogen embrittlement intergranular brittle cracking intergranular fatigue intergranular stress-corrosion...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c9001244
EISBN: 978-1-62708-224-2
... 2 sq mm. The furnace temperature was said to be 500 deg C. In addition to the fractures they also showed many more or less advanced cracks. These occurred in the circumferential grooves that recurred at regular intervals. The fractures were abraded and oxidized. They could have been fatigue...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001657
EISBN: 978-1-62708-227-3
... of a systematic approach, analyzing the nature of degeneration and failure of the failed components, utilizing conventional metallurgical techniques, is presented. The topographical features of the turbine blade fracture surface revealed a fatigue-induced crack growth pattern, where crack initiation had taken...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003552
EISBN: 978-1-62708-180-1
... temperatures Needs sustained stress. Not relevant for impact-induced cracking Hydrogen-induced blistering Low-strength steels at ambient temperatures Hydrogen forms gas-filled blisters Cracking from precipitation of internal gaseous hydrogen Heavy steel sections Induced by high-temperature exposure...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001746
EISBN: 978-1-62708-217-4
... Abstract Brittle intergranular fracture, typical of a hydrogen-induced delayed failure, caused the failure of an AISI 4340 Cr-Mo-Ni landing gear beam. Corrosion resulting from protective coating damage released nascent hydrogen, which diffused into the steel under the influence of sustained...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006784
EISBN: 978-1-62708-295-2
... Most common in Comments Hydrogen embrittlement High-strength steels and heavily cold-worked low-carbon steels, ambient temperatures Needs sustained stress. Not relevant for impact-induced cracking Hydrogen-induced blistering Low-strength steels at ambient temperatures Hydrogen forms gas...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006756
EISBN: 978-1-62708-295-2
... through the fracture at this location ( Fig. 3 ) exhibited none of the features associated with high-temperature creep damage, such as fissures and void coalescence at grain boundaries. This eliminated high-temperature creep as a potential damage mechanism. The examination, through the process...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c0090451
EISBN: 978-1-62708-218-1
... the parts to temperatures above the recognized limits for PET. Brittle fracture Chemical analysis Drying Feedstock Injection moldings Molding resins Plastic jackets Thermal shock Polyethylene terephthalate Brittle fracture (Other, general, or unspecified) processing-related failures...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001613
EISBN: 978-1-62708-235-8
... of the screw as evidenced by the “lip” seen in Fig. 3 . This type of nucleation is typical for H 2 -induced cracking/blistering in electroplated carbon and low alloy steels. Observation of the fracture surface at high magnification near the ID clearly demonstrates the transition in the fracture mode ( Fig. 4...