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low-temperature fracture toughness

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Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001835
EISBN: 978-1-62708-241-9
... fracture stress concentration metallographic analysis silicate and oxide inclusions stress analysis low-temperature fracture toughness Fe-0.34C-0.7Mn-0.34Cr (chromium alloy steel) Introduction Wind power generation has rapidly spread in recent years as one of the clean energy resources...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001114
EISBN: 978-1-62708-214-3
... was found. The cleavage features on the fracture surface of the clamp material were indicative of brittle fracture. This mechanism is favored in materials with low toughness, rapid rate of loading, and/or low temperatures. In this particular failure, the service temperature and the rate of loading were...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006809
EISBN: 978-1-62708-329-4
... mitigation storage tanks METAL TEMPERATURE highly influences the fracture toughness of carbon and low-alloy steel materials. At low temperatures, the material tends to behave in a brittle manner, making it much more susceptible to sudden fracture without warning. At high temperatures, the material...
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
... was initiated by weld imperfections and propagated in a brittle manner as a result of service stresses acting on plate having low toughness at the low service temperatures encountered. Recommendations On the basis of fracture toughness studies, it was suggested that the specifications for the steel...
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
..., the microstructure contained islands of ferrite in combination with pools of martensite of higher-than-average carbon content. As a result, plate A developed very low fracture toughness (compare Figs. 4 and 7 ) and widely different fracture characteristics between surface and midthickness of the plate ( Fig. 6...
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 fracture toughness level. Surface Examination Scanning Electron Microscopy/Fractography Figure 2 shows the ring sample with the flaw. This sample was cut in half. One half was examined as a cross section, and the other half was broken open at a low temperature and examined in a scanning...
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
...-section at room temperature, indicated an energy absorption of only 1.75 kpm/cm 2 confirming the expected low shock resistance. Fig. 2 Coarse bainitic structure of steel in condition as received, etched with Nital. 200 × An attempt was made to improve the toughness of the steel...
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
... , 5 . Figure 4 shows the amount of energy needed to fracture versus the testing temperature. Figure 5 is a plot of dynamic fracture toughness versus temperature for both sets of samples. The non-banded samples show an increase in toughness over the banded cores. Fig. 4 Charpy impact energy...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001136
EISBN: 978-1-62708-229-7
... of a large industrial fan. The failure occurred from high cycle bending fatigue and appeared to have originated from a weld defect. The fracture toughness of the plate was relatively low, equivalent to K Q = 65 ± 9 MPa m over the operating temperature range of 0 to 400°C. By means...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001053
EISBN: 978-1-62708-214-3
... that this imperfection, although small, initiated fracture because of the local geometry and stress conditions and the low toughness of the steel. It was recommended that (1) the probability of flaws be reduced by welding over or grinding out arc strikes, (2) the local stresses be lowered by post weld stress relief...
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
... philosophy was consequently regarded as acceptable. Fracture mechanics Low temperature Pressure vessels 1ZEET Fatigue fracture An extended ‘fitness for purpose’ evaluation of cold service pressure vessels (CSPV) used in the oil from coal industry was undertaken in 1982 ( 1 ). This study made...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003543
EISBN: 978-1-62708-180-1
... was secondary• Short-term, high-temperature, high-stress rupture has ductile appearance (see creep) • Load exceeded the dynamic strength of the part• Check for proper alloy and processing as well as proper toughness, grain size• Loading direction may show failure was secondary or impact induced• Low...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006944
EISBN: 978-1-62708-395-9
... temperature (DBTT) behavior in thermoplastics for high strain-rates resembles the fracture behavior of BCC metals, such as low-carbon and low-alloy steels. Figure 8 shows the variation of the apparent fracture toughness, K Q , as a function of temperature for a rubber-toughened thermoplastic. The K Q...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006774
EISBN: 978-1-62708-295-2
... energy absorption at fracture, and adequate toughness or ductility may be evaluated and defined by impact data, where criteria to determine whether the fracture is ductile or brittle involve some minimum level of absorbed energy at the service temperature of interest. The macroscale definition...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006778
EISBN: 978-1-62708-295-2
... toughness, grain size • Loading direction may show failure was secondary or impact induced • Low temperatures • Cyclic stress exceeded the endurance limit of the material • Check for proper strength, surface finish, assembly, and operation • Prior damage by mechanical or corrosion modes may have initiated...
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
... level of the ratio of fracture toughness to applied nominal stress. However, brittle fracture in a hot-rolled steel of 0.2% C, in a thin section (4.06 mm, or 0. 160 in., in this instance) at a service temperature of −1 to 4 °C (30 to 40 °F) is somewhat surprising. It should also be noted...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003537
EISBN: 978-1-62708-180-1
... with smooth grain boundaries Likely either improper thermal processing or environmental assisted fracture (high temperature, corrosive environment) Less common is low Δ K fatigue Intergranular with dimpled grain boundaries “Decohesive rupture—fracture at high fraction of melting point...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001004
EISBN: 978-1-62708-229-7
...) fracture, viz., in low temperature RTE fracture, initiation and propagation of microcracks are rate controlling while at high temperatures the nucleation and growth of creep cavitation, dislocation mobility and grain boundary sliding are important. Wilkinson et al ( 6 ) observed that the ductility of P...
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
... transition temperature in excess of 1000C. The sequence of events leading to failure was detailed. The main recommendation was to quench and temper existing couplings and to use a lower carbon quenched and tempered steel for new couplings. Couplings Drilling rigs 4142 UNS G41420 Brittle fracture...
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...