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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
... fasteners 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 Stress Analysis Chemical Composition Mechanical Characterization Metallographic...
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
...). The fracture 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. On the basis of fracture toughness studies, it was suggested that the specifications for the steel plates...
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
... risk 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...
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 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 ). Fig. 7 Charpy impact test results...
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
... the ductility requirements of API type 2 material; the elongation and reduction of area were less than specified. The toughness of the steel was low at ambient temperature. No evidence of overloading was found. The cleavage features on the fracture surface of the clamp material were indicative of brittle...
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
... in Fig. 2 . 355×. Figure 4 shows an SEM view of the fracture surface of the other half of the ring sample, which was broken open at a low temperature. The oxide-covered flaw surface and the fresh cleavage fracture caused by low-temperature breaking are clearly shown. Several such examinations...
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 Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001135
EISBN: 978-1-62708-219-8
... plates. Because of this, and the segregation problem, it seems as if the temperature used for normalizing was too low or times were too short. Therefore, the center of the plate did not get up to temperature. The results of our impact testing revealed poor impact properties for the banded cores...
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
... this resides in interpretation of fracture surface features at both the micro- and macroscales. It is important that examination of the fracture surface and adjacent component surface be done starting at low magnification with sequential examination of features of interest at increasing magnification...
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 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
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001136
EISBN: 978-1-62708-229-7
.... For the fracture toughness it was presumed that COD fracture toughness tests (in accordance with BS-5762, 1979 2 ) should be undertaken since the low carbon, medium strength steel may be expected to behaved plastically at ambient temperatures. Unfortunately the steel exhibited elastic brittle behavior...
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
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001272
EISBN: 978-1-62708-215-0
... full shelf toughness is achieved. This would further decrease the allowable nominal stress. Fig. 13 (a) Low magnification of flat fracture above thread imprints (regions 1 to 4 in Fig. 8 ). (b) High magnification of Fig. 7 showing brittle fracture. Fracture features are similar to those...
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
...-before-break 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...
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
.... This probably is the result of the differences between the mechanisms of low and high temperature (creep) 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...
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
.... , Mazhar A.A. , Fatigue behaviour of certain high-strength, low-alloy steel sheets . Met. Technol. 3 , 79 – 85 ( 1976 ) 10.1179/030716976803391665 22. Parker E.R. , Zackay V.F. , Microstructural features affecting fracture toughness of high strength steels . Eng. Fract. Mech...
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.marine.c9001591
EISBN: 978-1-62708-227-3
... toughness and the low ductile-brittle transition temperature. It has been suggested that the sinking of the RMS Titanic was due exclusively to the fracture of the rivets holding the hull plates together. The rivets were made from wrought iron. This implies that fracture of the plates would not have...
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
... purposes, Figure 10 displays the facets of the flaw region from the opened up subsidiary crack presented in Figure 5 .) Outside the shiny area is the fracture of the tensile specimen and the facets (see Figure 11 ) are comparable with those in Figure 7 from the fracture produced at low temperature...