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niobium

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.homegoods.c9001610
EISBN: 978-1-62708-222-8
...Abstract Abstract This investigation characterizes five surgical stainless steel piercings and one niobium piercing that caused adverse reactions during use, culminating with the removal of the jewelry. Chemical composition shows that none of the materials are in accordance with ISO standards...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0045918
EISBN: 978-1-62708-235-8
...Abstract Abstract Cracks, with no other damage, were observed in a niobium alloy (Nb-106) part when it was pulled from several months of protective storage for assembly into a rocket nozzle. SEM views showed the cracks to be intergranular, with contaminant particles on a large number...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c0045987
EISBN: 978-1-62708-221-1
... condition and had a ductile-to-brittle transition temperature exceeding 93 deg C (200 deg F). This transition temperature was much too high for the application. It was recommended that a modified ASTM A572, grade 42 (0.15% C max), type 1 or 2, steel be used (type 1, which contains niobium, may be needed...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001049
EISBN: 978-1-62708-214-3
..., the presence of niobium-bearing carbide particles associated with the dendrites, and a crack following the interdendritic path. Figure 6 is a high-magnification view of this area and reveals microcracks adjacent to the carbide particles. Figure 7 , taken from a polished specimen, shows corrosion product...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001816
EISBN: 978-1-62708-241-9
... of NbC and Ti(C,N) is very important during both room temperature and high temperature deformation of the material. Figure 13 shows a particle precipitated at grain boundaries, which was initially formed as a titanium carbonitride and then became a substrate for a niobium carbide layer, as confirmed...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001328
EISBN: 978-1-62708-215-0
... observed. SEM/EDS analysis of an original weldment showed a secondary phase in the cover pass rich in nickel, niobium, and silicon. This phase varied in terms of the relative niobium content. Niobium is also an effective carbide stabilizer. Corrosion Deposits Grain boundary oxidation products were...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c9001223
EISBN: 978-1-62708-233-4
... such as titanium or niobium. If such steels are heated to temperatures between 425 and 870° C 1 the carbon comes out of supersaturated solution, particularly between 600 and 700° C, and forms carbides with a high chromium content which precipitate preferentially at grain boundaries. The matrix...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001394
EISBN: 978-1-62708-234-1
... showed the material to have the following composition: Per cent. Chromium 23.0 Nickel 18.0 Molybdenum 1.8 Silicon 1.2 Manganese 0.75 Titanium Nil Niobium Nil As far as it was possible to ascertain, this particular composition does not conform to a standard...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0046252
EISBN: 978-1-62708-229-7
... analyses were made of the piping and of samples from welds 1 and 2 ( Fig. 1 ). Although some minor deviations from normal composition were found (particularly involving molybdenum, niobium, and titanium contents), these deviations did not affect material properties. Microhardness measurements were...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001395
EISBN: 978-1-62708-220-4
... fabrications there are obvious practical difficulties of carrying out such treatment. By the addition of titanium or niobium to the steel — the so-called “stabilising elements” — which have a greater affinity for carbon thar does chromium so that titanium or niobium carbides are preferentially formed...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006759
EISBN: 978-1-62708-295-2
..., and depending on the type, the low-alloying elements of niobium, vanadium, and titanium in the 0.005 to 0.15 wt% range ( Ref 3 , 4 ). While the tensile strength of A36 is specified to be between 58 and 80 ksi (400 and 550 MPa), HSLAs have specified tensile strength between 60 and 80 ksi minimum (415 and 550...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0091533
EISBN: 978-1-62708-217-4
... 1.2 Niobium 0.4 Titanium 0.3 Iron Bal The operating temperature of the duct surrounded by the clamp was 425 to 540 °C (800 to 1000 °F). The life of the clamp was expected to equal that of the aircraft. After 2 to 3 years of service, the clamp fractured in the area adjacent...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001171
EISBN: 978-1-62708-219-8
..., it is able to form a carbide less soluble in the γ phase than the chromium carbide. The most used stabilizing elements are titanium and niobium (sometimes also Nb plus Ta). The titanium additions should be, in theory, five times the carbon content of the steel, but, in practice, owing...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001104
EISBN: 978-1-62708-214-3
... 1.66 Sulfur <0.010 0.44 Phosphorus 0.014 0.012 Chromium 17.3 16.2 Nickel 35.5 37.0 Molybdenum 0.12 0.11 Copper 0.16 0.16 Titanium 0.12 <0.05 Aluminum … … Niobium <0.05 <0.05 Discussion The failure of the sinter belt material...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001213
EISBN: 978-1-62708-220-4
... to intergranular corrosion, i.e. an alloy in which the carbon is bound to e. g. titanium or niobium as a carbide of low solubility. The following steels should be taken into consideration for such an application: X 10 CrNiMoTi 18 10 (Material No. 1.4571) or X 10 CrNiMoNb 18 10 (Material No. 1.4180). Reference...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001316
EISBN: 978-1-62708-215-0
... <0.03 Lead <0.02 <0.02 <0.02 Aluminum <0.01 0.04 <0.01 Tin … <0.02 <0.02 Vanadium <0.01 <0.01 <0.01 Niobium … <0.01 <0.01 Boron … <0.0005 <0.0005 Titanium <0.03 <0.03 <0.03 Discussion Erosion...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001351
EISBN: 978-1-62708-215-0
... requirements for AISI 347 stainless steel Carbon 0.076 0.08 max Chromium 17.8 17–19 Nickel 9.4 9–13 Manganese 1.34 2.00 max Silicon 0.85 1.00 max Phosphorus 0.042 0.045 max Sulfur 0.002 0.030 max Niobium 0.44 10× Cu min Iron bal bal Mechanical Properties...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001336
EISBN: 978-1-62708-215-0
...) Phosphorus 0.016 0.023 0.045 (max) Sulfur 0.009 0.017 0.030 (max) Nitrogen <0.009 <0.002 0.10 (max) Titanium <0.01 <0.01 NR Niobium <0.01 <0.01 NR Copper 0.02 0.01 NR (a) NR, no requirement Corrosion Deposits Qualitative energy-dispersive...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001357
EISBN: 978-1-62708-215-0
... found were nickel, chromium, and cobalt; titanium, aluminum, and molybdenum were minor alloying elements. Tungsten, niobium, and tantalum were not detected. A more accurate chemical analysis revealed the following composition: 53.7% Ni, 18 to 20% Cr, 18.2% Co, 3.7% Ti, 3.7% Mo, 2.5% Al, 0.1 to 0.2% Fe...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001268
EISBN: 978-1-62708-215-0
..., there was no significant difference in grain size between the leafs. It was revealed that specimens from leafs 6 and 7 etched lighter than those taken from the remaining leafs. The dark etching characteristic indicates that niobium is tied in the γ′ phase, the strengthening mechanism of Inconel 718. Fig. 3...