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niobium alloys

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Published: 01 June 2019
Fig. 1 Combined SEM/AES analysis of failed niobium alloy rocket-nozzle component. (a) Intergranular-fracture surface with contaminant particles on grain facets. (b) AES spectra of contaminated fracture surface More
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 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 of the grain facets...
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
... of the stainless steel piercings passed the pitting-corrosion resistance criterion, which implies that %Cr + 3.3 × %Mo > 26. 7 Results of EDS revealed that Jewelry 4 is composed of dissimilar materials: the body of the jewelry is niobium, while its extremities (spherical nuts) are an iron-niobium alloy...
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
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001394
EISBN: 978-1-62708-234-1
... presumed. Spectroscope examination showed this particular composition (Fe-23Cr-18Ni-1.8Mo-1.2Si) did not conform to a standard specification and is apparently a proprietary alloy. It was evident that the particular mode of failure was related to the inherent structure of the material. Corrosion...
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
... (0.032 in.) thick, and the V-section was 1.3 mm (0.050 in.) thick; both were made of 19-9 DL heat-resisting alloy with the following composition: Element Composition, % Carbon 0.3 Manganese 1.1 Silicon 0.6 Chromium 19 Nickel 9 Molybdenum 1.25 Tungsten 1.2 Niobium...
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
... components superplastic deformation boundary sliding dislocation creep high-strength low alloy steel decohesions traction testing grain size elongation Ti-Nb microalloyed ultrafine-grained steel (UGS steel, general) high-strength low-alloy steel (HSLA steel, general) Introduction A material...
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
... 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 identified through EDS as consisting mostly...
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
... and an unused section of new wire showed that the fracture resulted from sulfur attack and overheating during service. It was recommended that the sinter belt material be changed to Nicrofer 3220-H (alloy 800H). Belt conveyors Carburization (corrosion) Furnace conveyors Sintering furnaces...
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
... requirements for carbon, manganese, phosphorus, sulfur, silicon, and when specified, copper, while HSLA A572 has requirements for carbon, manganese, phosphorus, sulfur, silicon, 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...
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
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001171
EISBN: 978-1-62708-219-8
... considerations can be made for the niobium whose amount must be not smaller than eight to ten times the carbon content 16 . Examples of steels satisfying these conditions are the types AISI 321 and 347, the alloy 20 (high-nickel stainless steel) and the alloy Ni-Fe-Cr 825 4 , 17 . The austenitic...
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
..., 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, <0.1% Nb, 0.085% C, and 0.006...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006783
EISBN: 978-1-62708-295-2
... of galvanic corrosion is affected by such factors as: The potential difference between the metals or alloys The nature of the environment/the electrical conductivity of the solution where the dissimilar metals are in contact The polarization behavior of the metals or alloys The geometric...
Book Chapter

Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003548
EISBN: 978-1-62708-180-1
... corrosion, pitting and crevice corrosion, intergranular corrosion, and velocity-affected corrosion. The article contains a table that lists combinations of alloys and environments subjected to selective leaching and the elements removed by leaching. corrosion crevice corrosion dealuminification...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001803
EISBN: 978-1-62708-241-9
... of titanium alloys especially intended to be used in living bodies began with the introduction of new alloys using biocompatible β stabilizer elements, such as iron, tantalum, zirconium, tin, and niobium. [ 3 ] The manufacturing of implant materials generally requires advanced casting and/or continuous...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006807
EISBN: 978-1-62708-329-4
..., it is essential to consider these possibilities when determining the short-term test conditions. Creep deformation mechanism maps, developed by Ashby and coworkers, identify the dominant deformation mechanism for a given stress-temperature combination for various metals and alloys ( Ref 5 ). Further details...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006787
EISBN: 978-1-62708-295-2
... exposed at 650 to 700 °C (1200 to 1290 °F). Nickel-chromium alloys containing titanium, niobium, and aluminum are better than basic nickel-chromium alloys exposed in carbon dioxide atmospheres at 700 to 800 °C (1290 to 1470 °F). The alumina scale-forming alloys appear to be much more resistant...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003517
EISBN: 978-1-62708-180-1
.... The article discusses metallurgical instabilities of steel-based alloys and nickel-base superalloys. It provides information on several life assessment methods, namely, the life fraction rule, parameter-based assessments, the thermal-mechanical fatigue, coating evaluations, hardness testing, microstructural...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003553
EISBN: 978-1-62708-180-1
... mm (0.050 in.) thick; both were made of 19-9 DL heat-resisting alloy with the following composition: Element Composition, % Carbon 0.3 Manganese 1.1 Silicon 0.6 Chromium 19 Nickel 9 Molybdenum 1.25 Tungsten 1.2 Niobium 0.4 Titanium 0.3 Iron Bal...