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notch toughness

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Published: 30 August 2021
Fig. 19 Notch toughness as a function of tempering temperature for a 4140 steel. Tempering time was 1 h. More
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Published: 01 June 2019
Fig. 5 Notch impact toughness as function of impact temperature. More
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 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
... 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 fracture morphologies...
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
... mechanism. As for the factors involved, cadmium plating, acid pickling, and steelmaking processes introduce hydrogen on part surfaces. As a second contributing factor, both bolts were 10 Rc points higher in hardness than specified (25 Rc), lessening ductility and notch toughness. A third factor...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001591
EISBN: 978-1-62708-227-3
... was probably as good as was available at the time the ship was constructed, it was very inferior when compared with modern steel. The notch toughness showed a very low value (4 J) for the steel at the water temperature (-2 deg C) in the North Atlantic at the time of the accident. Nonmetallic inclusions...
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Published: 01 December 2019
Fig. 6 The V-notched impact toughness test specimens More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c9001549
EISBN: 978-1-62708-224-2
... below the specified minimum value of 25 ft-lb (35 J) at 0 C (32 F). No notch toughness value was specified for the fishplates. Further, metallographic examination and sulfur printing of the broken components showed them to be rimming steels, which were not in conformance with the material specification...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001210
EISBN: 978-1-62708-227-3
...: Picral. View of part not subject to welding heat. 100 × The fine grained raw material had an elongation of 21.0 % (δ 10 ) at a yield point of 42.7 kp/mm 2 and 66.7 kp/mm 2 tensile strength. It had 63 % reduction of area and 16.1 and 15.2 kpm/cm 2 notch toughness at 18 and 0 °C, respectively...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001792
EISBN: 978-1-62708-241-9
... to have excellent notch toughness, which is in anomaly compared with other high strength steels. Tempered martensitic microstructure (see Fig. 3a ) revealed by metallography on gearbox shaft materials suggests that the shaft was heat treated. The circumferential geometrical discontinuity in the gearbox...
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
... (unnotched) tension specimen loaded slowly and under controlled conditions to fracture. Notch toughness represents the ability of a material to absorb energy and is determined under impact loading in the presence of a notch. Notch toughness is measured by using a variety of specimens, such as the Charpy V...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c0047414
EISBN: 978-1-62708-233-4
... Abstract There was a fracture of an anchor link that rides on a post with a spherical surface. No bevel or radius was called for, leaving an extremely sharp edge. A fatigue crack grew from the top sharp edge. The casting had good toughness and strength (1448 MPa, or 210 ksi, tensile strength...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.rail.c0089716
EISBN: 978-1-62708-231-0
... plates be modified to include a toughness requirement: the Charpy V-notch requirement of 20 J (15 ft ⋅ lbf) at -46 °C (-50 °F), which is specified in ASTM A 300 for ASTM A212, grade B, steel, should be adequate for this application. In addition, improved welding and inspection practices were recommended...
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
.... Care was taken to ensure that the test specimens removed were from the same location and in the same orientation as for the specimens removed from the broken blade. To determine strength and Charpy V-notch toughness properties, specimens were extracted from the surface location, as well as from...
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: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001353
EISBN: 978-1-62708-215-0
... in low toughness. It was recommended that fully killed carbon steel with a fine-grain microstructure be used. Redesign of the flap to remove the step in the forging that acted as a notch was also recommended. Electric power generation Forgings Marine environments Weldments Fe-0.10C Fe-0.19C...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.rail.c9001138
EISBN: 978-1-62708-231-0
... As stated above, a number of detail design and manufacturing problems allowed the failure to initiate and propagate. The design problems include both material selection and detail design. The alloy, although structurally strong, had poor notch toughness and a high ductile to brittle transition temperature...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c0048840
EISBN: 978-1-62708-220-4
...) tensile strength and a 241-MPa (35-ksi) yield strength. The steel mill tests showed a Charpy V-notch energy absorption of 30 J (22 ft · lb) at 20 °C (68 °F). The plates had been hot formed into segments during construction of the reactor. The inside of the vessel was refractory lined to keep its...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001544
EISBN: 978-1-62708-219-8
... the material met chemical and mechanical property requirements, tests showed it had low fracture toughness and critical-sized flaws oriented normal to the principal stress in the failed junction piece. Fabrication procedures resulted in high residual stresses and a metallurgical notch at the radius...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003516
EISBN: 978-1-62708-180-1
... steel becomes increasingly important. One can see how the design process and the usage environment narrow the material choices. An axle would also be designed from steel. In this instance machinability, strength, toughness, fatigue resistance, notch insensitivity, and corrosion resistance would...