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impact toughness

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c9001196
EISBN: 978-1-62708-224-2
..., 200x micrographs, chemical analysis, and metallographic examination) supported the conclusion that the primary cause of the failure was the brittleness (lack of impact toughness) of the steel. The coarse bainitic microstructure was inadequate for the service application. The microstructure resulted...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001055
EISBN: 978-1-62708-214-3
... fractographic, metallographic, chemical, and mechanical property (tension and impact toughness) analyses were conducted. On the basis of the tests and observations, it was concluded that the failure was the combined result of poor notch toughness (impact) properties of the steel, high stresses in the joint area...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003566
EISBN: 978-1-62708-180-1
... rolling contact. Hence, the spalling of gear teeth and bearing materials is also known as fatigue wear or rolling contact fatigue. Spalling damage on a surface can also occur from impact events. For example, the spalling of striking/struck tools is of considerable interest from the engineering...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003565
EISBN: 978-1-62708-180-1
... impacts. Increasing the number of impacts not only increases the number of cracks but also increases the wear at each crack before the coating eventually starts to delaminate or spall. Cracks arise when a hard coating is not tough or ductile enough to accommodate the stress of deformation under an impact...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006793
EISBN: 978-1-62708-295-2
... also increases the wear at each crack before the coating eventually starts to delaminate or spall. Cracks arise when a hard coating is not tough or ductile enough to accommodate the stress of deformation under an impact. In ballistic impact wear testers, repetitive impacts are achieved by firing...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006761
EISBN: 978-1-62708-295-2
... testing, macroindentation hardness, microindentation hardness, and the impact toughness test. bend testing failure analysis impact toughness test macroindentation hardness microindentation hardness static load testing uniaxial compression testing uniaxial tension testing...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001768
EISBN: 978-1-62708-241-9
... of the crack, supporting the metallurgical findings. A substantial deterioration of the Charpy impact toughness of the material in the heel region was also observed which is believed to have caused the initiation and propagation of the cracks leading to the failure. splice plate fracture...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001301
EISBN: 978-1-62708-215-0
... impact strength. Failure was attributed to low toughness caused by the absence of, or improper, heat treatment. Casting defects identified during metallographic examination were determined to be the fracture initiation site, but were considered less significant than the low as-received impact strength of...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001353
EISBN: 978-1-62708-215-0
... tensile properties of the forging material were found to be satisfactory, the notch sensitivity of the material (i.e., its toughness) was extremely poor, as indicated by Charpy impact testing (3.9 J, or 2.9 ft . lbf). The coarse grain structure of the forging, accompanied by inferior chemical composition...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001150
EISBN: 978-1-62708-235-8
... effects of the low fracture toughness of the plate on planes parallel in the rolling direction, the presence of the preexisting cracks, and the relatively large section thickness of the bars, the bars whose lengths were transverse to the rolling direction fractured brittlely when subjected to impact loads...
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
... 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. The...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001637
EISBN: 978-1-62708-221-1
... due to SCC and showed that this was usually initiated by bending of the bolts that occurred due to lateral movement of the rock strata. It also showed that many of the failed bolts had very low toughness with Charpy impact values of 4 to 7 Joules. Fracture Fe-0.5C-0.8Cr Fe-0.4C-NbVTi Fe-0.5C...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0047347
EISBN: 978-1-62708-234-1
.... This alloy has low ductility and toughness and is excellent for resistance to abrasive wear. However, little plastic displacement will occur with this material, resulting in brittle cracking (chipping) of the surface material. Also, impacting by a hard substance will result in chipping. Fig. 1...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001752
EISBN: 978-1-62708-241-9
... ultra-low sulfur AMS 6414 steels. aircraft crankshafts fatigue fracture forging defects low-sulfur steel planar dimpled facets tension-to-tension fatigue testing notch impact toughness AMS 6414 (low-alloy steel) UNS G43400 References 1. Teledyne...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001787
EISBN: 978-1-62708-241-9
... of improving the strength and toughness of the steel [ 15 ]. Bainite matrix can increase the impact and twist resistance. Once these adaptable microstructures of the drill bit are obtained, the carburized layer can well match the matrix. In accordance with microstructure observation and hardness...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001035
EISBN: 978-1-62708-214-3
... dimples. No evidence of prior cracking was found. The exemplar specimens from the simulation impact testing failed in a manner consistent with that observed in the axle. The examination confirmed that the failure was a one-time impact overload fracture and not the result of any prior crack in the material...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c9001550
EISBN: 978-1-62708-228-0
... would have tended to lower this and improve toughness, it is clear that the original material had poor impact properties and a high DBTT. Fig. 5 Charpy V-notch impact energy data for pad and shell plate (mean values). It is clear that the cause of the tank failure was brittle fracture...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001261
EISBN: 978-1-62708-219-8
... Tensile Strength Elongation Reduction in Area upper lower L O = 5d kp/mm 2 kp/mm 2 kp/mm 2 % % 21,8 21,7 35,3 35,5 70 23,7 23,0 35,5 38,4 70 Figure 5 shows notch impact toughness as a function of testing temperature of ISO-V-notch specimens. The values at + 40...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c9001167
EISBN: 978-1-62708-228-0
...) normalized from 9000C. Microscopic examination revealed the crack's initiation point and subsequent propagation. SEM examination of chemically stripped corrosion showed that corrosion fatigue and stress corrosion might have contributed to the initial slow crack growth. Impact tests revealed a fracture...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003560
EISBN: 978-1-62708-180-1
.... They have fairly good resistance to gouging abrasion, combined with good toughness and the ability to be heat treated in heavy sections ( Ref 9 ). For other applications involving gouging abrasion, such as autogenous mill liners, impactor bars in impact crushers, and earth-moving tools, the manganese...