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fracture toughness

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001605
EISBN: 978-1-62708-217-4
... found at the tips of the cracks were evaluated using electron micrograph stereo image pairs to characterize local fracture toughness. To complete the failure analysis, nondestructive evaluation, metallographic examination, and chemical investigations were carried out. No secondary cracks could be found...
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Published: 01 December 1992
Fig. 2 Fracture morphology of fracture toughness specimen (fusion line). More
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Published: 01 June 2019
Fig. 6 Influence of carbon content on dynamic fracture toughness at different temperature More
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Published: 01 January 2002
Fig. 47 Effect of section thickness on fracture toughness. Source: Ref 65 More
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Published: 01 January 2002
Fig. 5 Effect of thickness on fracture toughness More
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Published: 01 January 2002
Fig. 7 Plot showing the effect of temper embrittlement on the fracture toughness of a 1CrMoV steel. Source: Ref 8 More
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Published: 01 January 2002
Fig. 23 Effect of thickness on state of stress and fracture toughness at the crack tip. Source: Ref 5 More
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Published: 01 January 2002
Fig. 13 Schematic of variation in fracture toughness and macro-scale features of fracture surfaces for an inherently ductile material. As section thickness ( B ) or preexisting crack length ( a ) increases, plane strain conditions develop first along the centerline and result in a flat fracture More
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Published: 01 January 2002
Fig. 55 Correlation of shear lip width with fracture toughness. The depth of the shear lip ( D ) is related to the plane-stress plastic zone size and then to the fracture toughness. See text for discussion Source: Ref 25 More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.rail.c9001531
EISBN: 978-1-62708-231-0
... fracture toughness, KID, is obviously lower than static fracture toughness, KIC, and has the same trend as KIC. The ratio of KID/sigma YD is the most reasonable parameter to evaluate the fracture resistance of wheel steels with different composition and yield strength. Decreasing carbon content...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003513
EISBN: 978-1-62708-180-1
... force and resistance (i.e., toughness). The second edition of the BSI PD 6493 ( Ref 6 ) presents failure assessments in the form of FADs using CTOD to characterize both crack-driving force and fracture toughness. The British Standards Institution has issued an updated and expanded version of PD 6493...
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Published: 01 January 2002
Fig. 9 Crack-tip opening displacement (CTOD) toughness, HSLA 50. δ, CTOD; δ c , CTOD fracture toughness, no significant stable crack extension, unstable fracture; δ e , elastic component of CTOD; δ m , CTOD fracture toughness, significant stable crack extension, plastic collapse; δ p , plastic More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001135
EISBN: 978-1-62708-219-8
... Segregation Toughness ASTM A441 Brittle fracture Fatigue fracture Introduction In 1979, during a Routine Bridge inspection, a 4″ fatigue crack was discovered in the top flange plate of one tie girder of a tied arch bridge crossing the Mississippi River. This bridge was relatively new, having been...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001128
EISBN: 978-1-62708-214-3
...Abstract Abstract Creep crack growth and fracture toughness tests were performed using test material machined from a seam welded ASTM A-155-66 class 1 (2.25Cr-1Mo) steel steam pipe that had been in service for 15 years. The fracture morphology was examined using SEM fractography. Dimpled...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001780
EISBN: 978-1-62708-241-9
... propagation rates, fracture toughness, notch toughness, and transverse tensile properties, and do so in an anisotropic manner with respect to rolling direction. Significant property anisotropy has been documented in the failures investigated, providing evidence that designers failed to account for it. Typical...
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
... the actual mechanical properties and to determine the metallurgical cause of the observed indications. Samples were examined in a scanning electron microscope and subjected to chemical analysis and several mechanical property tests, including tensile, Charpy V-notch impact, and fracture toughness...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001111
EISBN: 978-1-62708-214-3
... in.) wide flange and arrested 100 mm (4 in.) down the slant web. Failure analysis revealed a major deficiency in fracture toughness. The failure occurred as a brittle fracture after the formation of a welding hot crack and approximately 40 mm (1 1 2 in.) of slow crack growth. It was recommended...
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Published: 30 August 2021
Fig. 3 General plot of the ratios of toughness and stress showing the relationship between linear elastic fracture mechanics and strength of materials as it relates to fracture and structural integrity. K , stress-intensity factor; K Ic , plane-strain fracture toughness; S , factor of safety More
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001272
EISBN: 978-1-62708-215-0
... mechanics Fracture toughness Galvanized steels Mechanical properties Stresses Tanks ASTM A446 grade B ASTM A446 grade F Brittle fracture Background A large grain bin failed cataclysmically soon after erection ( Fig. 1 , 2 ). Failure occurred while the bin was in the static loaded condition...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c9001142
EISBN: 978-1-62708-228-0
... elongated. In addition, the stress intensity factor KI calculated from the value of the internal pressure was lower than that estimated by the fracture toughness test. All of this suggests that the tanks were not sufficiently annealed and prone to brittle fracture. The analysis thus proves that cracks...